First version of submodule implementation

Based on ATTiny2313 / ATTiny4313
Merge tag '2.1' into develop
2018-11-18 11:16:33 +01:00 · 2018-04-29 11:06:33 +02:00 · 2018-04-29 11:04:48 +02:00
43 changed files with 6908 additions and 5 deletions
--- a/.gitignore
+++ b/.gitignore
@ -4,3 +4,5 @@ bin
 *.sublime-workspace
 node_modules
 src/secret.h
+/kicad/Stairs.kicad_pcb-bak
+/kicad/Stairs.bak
--- a/kicad/Stairs-cache.lib
+++ b/kicad/Stairs-cache.lib
@ -0,0 +1,387 @@
+EESchema-LIBRARY Version 2.4
+#encoding utf-8
+#
+# AMS1117-5.0_AMS1117-5.0
+#
+DEF AMS1117-5.0_AMS1117-5.0 U 0 40 Y Y 1 L N
+F0 "U" -400 220 50 H V L BNN
+F1 "AMS1117-5.0_AMS1117-5.0" -401 -321 50 H V L BNN
+F2 "SOT229P700X180-4N" 0 0 50 H I L BNN
+F3 "Sot223/Pkg 1-Amp 5-Volt Low Drop Out Voltage Regulatator" 0 0 50 H I L BNN
+F4 "Unavailable" 0 0 50 H I L BNN
+F5 "Advanced Monolithic Systems" 0 0 50 H I L BNN
+F6 "None" 0 0 50 H I L BNN
+F7 "None" 0 0 50 H I L BNN
+F8 "AMS1117-5.0" 0 0 50 H I L BNN
+DRAW
+S -400 200 400 -200 0 1 0 f
+X ADJ/GND 1 600 -100 200 L 40 40 0 0 W
+X VOUT 2 600 100 200 L 40 40 0 0 O
+X VIN 3 -600 100 200 R 40 40 0 0 I
+ENDDRAW
+ENDDEF
+#
+# Connector_Generic_Conn_01x02
+#
+DEF Connector_Generic_Conn_01x02 J 0 40 Y N 1 F N
+F0 "J" 0 100 50 H V C CNN
+F1 "Connector_Generic_Conn_01x02" 0 -200 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ Connector*:*_1x??_*
+$ENDFPLIST
+DRAW
+S -50 -95 0 -105 1 1 6 N
+S -50 5 0 -5 1 1 6 N
+S -50 50 50 -150 1 1 10 f
+X Pin_1 1 -200 0 150 R 50 50 1 1 P
+X Pin_2 2 -200 -100 150 R 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Connector_Generic_Conn_01x04
+#
+DEF Connector_Generic_Conn_01x04 J 0 40 Y N 1 F N
+F0 "J" 0 200 50 H V C CNN
+F1 "Connector_Generic_Conn_01x04" 0 -300 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ Connector*:*_1x??_*
+$ENDFPLIST
+DRAW
+S -50 -195 0 -205 1 1 6 N
+S -50 -95 0 -105 1 1 6 N
+S -50 5 0 -5 1 1 6 N
+S -50 105 0 95 1 1 6 N
+S -50 150 50 -250 1 1 10 f
+X Pin_1 1 -200 100 150 R 50 50 1 1 P
+X Pin_2 2 -200 0 150 R 50 50 1 1 P
+X Pin_3 3 -200 -100 150 R 50 50 1 1 P
+X Pin_4 4 -200 -200 150 R 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Connector_Generic_Conn_01x06
+#
+DEF Connector_Generic_Conn_01x06 J 0 40 Y N 1 F N
+F0 "J" 0 300 50 H V C CNN
+F1 "Connector_Generic_Conn_01x06" 0 -400 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ Connector*:*_1x??_*
+$ENDFPLIST
+DRAW
+S -50 -295 0 -305 1 1 6 N
+S -50 -195 0 -205 1 1 6 N
+S -50 -95 0 -105 1 1 6 N
+S -50 5 0 -5 1 1 6 N
+S -50 105 0 95 1 1 6 N
+S -50 205 0 195 1 1 6 N
+S -50 250 50 -350 1 1 10 f
+X Pin_1 1 -200 200 150 R 50 50 1 1 P
+X Pin_2 2 -200 100 150 R 50 50 1 1 P
+X Pin_3 3 -200 0 150 R 50 50 1 1 P
+X Pin_4 4 -200 -100 150 R 50 50 1 1 P
+X Pin_5 5 -200 -200 150 R 50 50 1 1 P
+X Pin_6 6 -200 -300 150 R 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Connector_Generic_Conn_02x03_Counter_Clockwise
+#
+DEF Connector_Generic_Conn_02x03_Counter_Clockwise J 0 40 Y N 1 F N
+F0 "J" 50 200 50 H V C CNN
+F1 "Connector_Generic_Conn_02x03_Counter_Clockwise" 50 -200 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ Connector*:*_2x??_*
+$ENDFPLIST
+DRAW
+S -50 -95 0 -105 1 1 6 N
+S -50 5 0 -5 1 1 6 N
+S -50 105 0 95 1 1 6 N
+S -50 150 150 -150 1 1 10 f
+S 150 -95 100 -105 1 1 6 N
+S 150 5 100 -5 1 1 6 N
+S 150 105 100 95 1 1 6 N
+X Pin_1 1 -200 100 150 R 50 50 1 1 P
+X Pin_2 2 -200 0 150 R 50 50 1 1 P
+X Pin_3 3 -200 -100 150 R 50 50 1 1 P
+X Pin_4 4 300 -100 150 L 50 50 1 1 P
+X Pin_5 5 300 0 150 L 50 50 1 1 P
+X Pin_6 6 300 100 150 L 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_C
+#
+DEF Device_C C 0 10 N Y 1 F N
+F0 "C" 25 100 50 H V L CNN
+F1 "Device_C" 25 -100 50 H V L CNN
+F2 "" 38 -150 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ C_*
+$ENDFPLIST
+DRAW
+P 2 0 1 20 -80 -30 80 -30 N
+P 2 0 1 20 -80 30 80 30 N
+X ~ 1 0 150 110 D 50 50 1 1 P
+X ~ 2 0 -150 110 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_Crystal_Small
+#
+DEF Device_Crystal_Small Y 0 40 N N 1 F N
+F0 "Y" 0 100 50 H V C CNN
+F1 "Device_Crystal_Small" 0 -100 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ Crystal*
+$ENDFPLIST
+DRAW
+S -30 -60 30 60 0 1 0 N
+P 2 0 1 15 -50 -30 -50 30 N
+P 2 0 1 15 50 -30 50 30 N
+X 1 1 -100 0 50 R 50 50 1 1 P
+X 2 2 100 0 50 L 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_R
+#
+DEF Device_R R 0 0 N Y 1 F N
+F0 "R" 80 0 50 V V C CNN
+F1 "Device_R" 0 0 50 V V C CNN
+F2 "" -70 0 50 V I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ R_*
+$ENDFPLIST
+DRAW
+S -40 -100 40 100 0 1 10 N
+X ~ 1 0 150 50 D 50 50 1 1 P
+X ~ 2 0 -150 50 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# MAX485_MAX485
+#
+DEF MAX485_MAX485 U 0 40 Y Y 1 L N
+F0 "U" -401 301 50 H V L BNN
+F1 "MAX485_MAX485" -401 -301 50 H V L BNN
+F2 "" 0 0 50 H I C CNN
+F3 "Maxim Integrated" 0 0 50 H I L BNN
+F4 "None" 0 0 50 H I L BNN
+F5 "Unavailable" 0 0 50 H I L BNN
+F6 "None" 0 0 50 H I L BNN
+F7 "MAX485" 0 0 50 H I L BNN
+$FPLIST
+ DIL08
+ SO08
+$ENDFPLIST
+DRAW
+S -400 300 400 -200 0 1 0 f
+X RO 1 -600 200 200 R 40 40 0 0 B
+X RE 2 -600 100 200 R 40 40 0 0 B I
+X DE 3 -600 0 200 R 40 40 0 0 B
+X DI 4 -600 -100 200 R 40 40 0 0 B
+X GND 5 600 -100 200 L 40 40 0 0 W
+X A 6 600 0 200 L 40 40 0 0 B
+X B 7 600 100 200 L 40 40 0 0 B
+X VCC 8 600 200 200 L 40 40 0 0 W
+ENDDRAW
+ENDDEF
+#
+# MCU_Microchip_ATtiny_ATtiny2313A-SU
+#
+DEF MCU_Microchip_ATtiny_ATtiny2313A-SU U 0 20 Y Y 1 F N
+F0 "U" -500 1050 50 H V L BNN
+F1 "MCU_Microchip_ATtiny_ATtiny2313A-SU" 100 -1050 50 H V L TNN
+F2 "Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm" 0 0 50 H I C CIN
+F3 "" 0 0 50 H I C CNN
+ALIAS ATtiny2313-20SU ATtiny2313A-SU ATtiny4313-SU
+$FPLIST
+ SOIC*7.5x12.8mm*P1.27mm*
+$ENDFPLIST
+DRAW
+S -500 -1000 500 1000 0 1 10 f
+X PA2/~RESET 1 -600 800 100 R 50 50 1 1 T
+X GND 10 0 -1100 100 U 50 50 1 1 W
+X PD6 11 600 -700 100 L 50 50 1 1 T
+X PB0 12 600 800 100 L 50 50 1 1 T
+X PB1 13 600 700 100 L 50 50 1 1 T
+X PB2 14 600 600 100 L 50 50 1 1 T
+X PB3 15 600 500 100 L 50 50 1 1 T
+X PB4 16 600 400 100 L 50 50 1 1 T
+X PB5 17 600 300 100 L 50 50 1 1 T
+X PB6 18 600 200 100 L 50 50 1 1 T
+X PB7 19 600 100 100 L 50 50 1 1 T
+X PD0 2 600 -100 100 L 50 50 1 1 T
+X VCC 20 0 1100 100 D 50 50 1 1 W
+X PD1 3 600 -200 100 L 50 50 1 1 T
+X PA1/XTAL2 4 -600 400 100 R 50 50 1 1 T
+X PA0/XTAL1 5 -600 600 100 R 50 50 1 1 T
+X PD2 6 600 -300 100 L 50 50 1 1 T
+X PD3 7 600 -400 100 L 50 50 1 1 T
+X PD4 8 600 -500 100 L 50 50 1 1 T
+X PD5 9 600 -600 100 L 50 50 1 1 T
+ENDDRAW
+ENDDEF
+#
+# PCA9685-TSSOP_PCA9685-TSSOP
+#
+DEF PCA9685-TSSOP_PCA9685-TSSOP U 0 40 Y Y 1 F N
+F0 "U" 0 -100 50 H V C CNN
+F1 "PCA9685-TSSOP_PCA9685-TSSOP" 0 100 50 H V C CNN
+F2 "MODULE" 0 0 50 H I C CNN
+F3 "DOCUMENTATION" 0 0 50 H I C CNN
+DRAW
+S -450 -850 450 850 1 0 0 f
+X A0 1 -750 650 300 R 50 50 1 1 I
+X LED4 10 -750 -250 300 R 50 50 1 1 O
+X LED5 11 -750 -350 300 R 50 50 1 1 O
+X LED6 12 -750 -450 300 R 50 50 1 1 O
+X LED7 13 -750 -550 300 R 50 50 1 1 O
+X GND 14 -750 -650 300 R 50 50 1 1 I
+X LED8 15 750 -650 300 L 50 50 1 1 O
+X LED9 16 750 -550 300 L 50 50 1 1 O
+X LED10 17 750 -450 300 L 50 50 1 1 O
+X LED11 18 750 -350 300 L 50 50 1 1 O
+X LED12 19 750 -250 300 L 50 50 1 1 O
+X A1 2 -750 550 300 R 50 50 1 1 I
+X LED13 20 750 -150 300 L 50 50 1 1 O
+X LED14 21 750 -50 300 L 50 50 1 1 O
+X LED15 22 750 50 300 L 50 50 1 1 O
+X OE 23 750 150 300 L 50 50 1 1 I
+X A5 24 750 250 300 L 50 50 1 1 I
+X EXTCLK 25 750 350 300 L 50 50 1 1 I
+X SCL 26 750 450 300 L 50 50 1 1 I
+X SDA 27 750 550 300 L 50 50 1 1 B
+X VCC 28 750 650 300 L 50 50 1 1 I
+X A2 3 -750 450 300 R 50 50 1 1 I
+X A3 4 -750 350 300 R 50 50 1 1 I
+X A4 5 -750 250 300 R 50 50 1 1 I
+X LED0 6 -750 150 300 R 50 50 1 1 O
+X LED1 7 -750 50 300 R 50 50 1 1 O
+X LED2 8 -750 -50 300 R 50 50 1 1 O
+X LED3 9 -750 -150 300 R 50 50 1 1 O
+ENDDRAW
+ENDDEF
+#
+# Switch_SW_Push
+#
+DEF Switch_SW_Push SW 0 40 N N 1 F N
+F0 "SW" 50 100 50 H V L CNN
+F1 "Switch_SW_Push" 0 -60 50 H V C CNN
+F2 "" 0 200 50 H I C CNN
+F3 "" 0 200 50 H I C CNN
+DRAW
+C -80 0 20 0 1 0 N
+C 80 0 20 0 1 0 N
+P 2 0 1 0 0 50 0 120 N
+P 2 0 1 0 100 50 -100 50 N
+X 1 1 -200 0 100 R 50 50 0 1 P
+X 2 2 200 0 100 L 50 50 0 1 P
+ENDDRAW
+ENDDEF
+#
+# Transistor_FET_IRLB8721PBF
+#
+DEF Transistor_FET_IRLB8721PBF Q 0 0 Y N 1 F N
+F0 "Q" 250 75 50 H V L CNN
+F1 "Transistor_FET_IRLB8721PBF" 250 0 50 H V L CNN
+F2 "Package_TO_SOT_THT:TO-220-3_Vertical" 250 -75 50 H I L CIN
+F3 "" 0 0 50 H I L CNN
+ALIAS IRF3205 IRF540N IRF740 IRLB8721PBF IRLZ34N IRLZ44N
+$FPLIST
+ TO?220*
+$ENDFPLIST
+DRAW
+C 65 0 111 0 1 10 N
+C 100 -70 11 0 1 0 F
+C 100 70 11 0 1 0 F
+P 2 0 1 0 10 0 -100 0 N
+P 2 0 1 0 30 -70 100 -70 N
+P 2 0 1 10 30 -50 30 -90 N
+P 2 0 1 0 30 0 100 0 N
+P 2 0 1 10 30 20 30 -20 N
+P 2 0 1 0 30 70 100 70 N
+P 2 0 1 10 30 90 30 50 N
+P 2 0 1 0 100 -70 100 -100 N
+P 2 0 1 0 100 -70 100 0 N
+P 2 0 1 0 100 100 100 70 N
+P 3 0 1 10 10 75 10 -75 10 -75 N
+P 4 0 1 0 40 0 80 15 80 -15 40 0 F
+P 4 0 1 0 100 -70 130 -70 130 70 100 70 N
+P 4 0 1 0 110 20 115 15 145 15 150 10 N
+P 4 0 1 0 130 15 115 -10 145 -10 130 15 N
+X G 1 -200 0 100 R 50 50 1 1 I
+X D 2 100 200 100 D 50 50 1 1 P
+X S 3 100 -200 100 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# power_+12V
+#
+DEF power_+12V #PWR 0 0 Y Y 1 F P
+F0 "#PWR" 0 -150 50 H I C CNN
+F1 "power_+12V" 0 140 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+DRAW
+P 2 0 1 0 -30 50 0 100 N
+P 2 0 1 0 0 0 0 100 N
+P 2 0 1 0 0 100 30 50 N
+X +12V 1 0 0 0 U 50 50 1 1 W N
+ENDDRAW
+ENDDEF
+#
+# power_+5V
+#
+DEF power_+5V #PWR 0 0 Y Y 1 F P
+F0 "#PWR" 0 -150 50 H I C CNN
+F1 "power_+5V" 0 140 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+DRAW
+P 2 0 1 0 -30 50 0 100 N
+P 2 0 1 0 0 0 0 100 N
+P 2 0 1 0 0 100 30 50 N
+X +5V 1 0 0 0 U 50 50 1 1 W N
+ENDDRAW
+ENDDEF
+#
+# power_GND
+#
+DEF power_GND #PWR 0 0 Y Y 1 F P
+F0 "#PWR" 0 -250 50 H I C CNN
+F1 "power_GND" 0 -150 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+DRAW
+P 6 0 1 0 0 0 0 -50 50 -50 0 -100 -50 -50 0 -50 N
+X GND 1 0 0 0 D 50 50 1 1 W N
+ENDDRAW
+ENDDEF
+#
+# power_PWR_FLAG
+#
+DEF power_PWR_FLAG #FLG 0 0 N N 1 F P
+F0 "#FLG" 0 75 50 H I C CNN
+F1 "power_PWR_FLAG" 0 150 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+DRAW
+P 6 0 1 0 0 0 0 50 -40 75 0 100 40 75 0 50 N
+X pwr 1 0 0 0 U 50 50 0 0 w
+ENDDRAW
+ENDDEF
+#
+#End Library
--- a/kicad/Stairs.kicad_pcb
+++ b/kicad/Stairs.kicad_pcb
--- a/kicad/Stairs.net
+++ b/kicad/Stairs.net
@ -0,0 +1,581 @@
+(export (version D)
+  (design
+    (source P:\Electronics\Stairs\kicad\Stairs.sch)
+    (date "11-11-2018 20:15:56")
+    (tool "Eeschema (5.0.1)-3")
+    (sheet (number 1) (name /) (tstamps /)
+      (title_block
+        (title "Stairs submodule")
+        (company "Mark van Renswoude")
+        (rev 1)
+        (date 2018-09-02)
+        (source Stairs.sch)
+        (comment (number 1) (value ""))
+        (comment (number 2) (value ""))
+        (comment (number 3) (value ""))
+        (comment (number 4) (value "")))))
+  (components
+    (comp (ref PCA9685)
+      (value PCA9685-TSSOP)
+      (footprint Housings_SSOP:TSSOP-28_4.4x9.7mm_Pitch0.65mm)
+      (datasheet DOCUMENTATION)
+      (libsource (lib PCA9685-TSSOP) (part PCA9685-TSSOP) (description ""))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5B8AD5C2))
+    (comp (ref U2)
+      (value MAX485)
+      (footprint Housings_SOIC:SO-8_5.3x6.2mm_Pitch1.27mm)
+      (datasheet "Maxim Integrated")
+      (fields
+        (field (name Field4) None)
+        (field (name Field5) Unavailable)
+        (field (name Field6) None)
+        (field (name Field7) MAX485))
+      (libsource (lib MAX485) (part MAX485) (description ""))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5B8AD72A))
+    (comp (ref P6)
+      (value PWR_IN)
+      (footprint Terminal_Blocks:TerminalBlock_bornier-2_P5.08mm)
+      (libsource (lib Connector_Generic) (part Conn_01x02) (description "Generic connector, single row, 01x02, script generated (kicad-library-utils/schlib/autogen/connector/)"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5B8AD8CA))
+    (comp (ref P5)
+      (value PWR_OUT)
+      (footprint Terminal_Blocks:TerminalBlock_bornier-2_P5.08mm)
+      (libsource (lib Connector_Generic) (part Conn_01x02) (description "Generic connector, single row, 01x02, script generated (kicad-library-utils/schlib/autogen/connector/)"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5B8ADA74))
+    (comp (ref P3)
+      (value SENSOR)
+      (footprint Terminal_Blocks:TerminalBlock_bornier-6_P5.08mm)
+      (libsource (lib Connector_Generic) (part Conn_01x06) (description "Generic connector, single row, 01x06, script generated (kicad-library-utils/schlib/autogen/connector/)"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5B8AE6A5))
+    (comp (ref P1)
+      (value DATA_IN)
+      (footprint Terminal_Blocks:TerminalBlock_bornier-2_P5.08mm)
+      (libsource (lib Connector_Generic) (part Conn_01x02) (description "Generic connector, single row, 01x02, script generated (kicad-library-utils/schlib/autogen/connector/)"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5B8AE987))
+    (comp (ref P2)
+      (value DATA_OUT)
+      (footprint Terminal_Blocks:TerminalBlock_bornier-2_P5.08mm)
+      (libsource (lib Connector_Generic) (part Conn_01x02) (description "Generic connector, single row, 01x02, script generated (kicad-library-utils/schlib/autogen/connector/)"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5B8AE9DD))
+    (comp (ref AMS1117)
+      (value AMS1117-5)
+      (footprint AMS1117-5.0:SOT229P700X180-4N)
+      (datasheet AMS1117-5.0)
+      (fields
+        (field (name Field4) None)
+        (field (name Field5) Unavailable)
+        (field (name Field6) "Sot223/Pkg 1-Amp 3.3-Volt Low Drop Out Voltage Regulatator")
+        (field (name Field7) "Advanced Monolithic Systems")
+        (field (name Field8) None))
+      (libsource (lib AMS1117-5.0) (part AMS1117-5.0) (description ""))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5B8AFB24))
+    (comp (ref C3)
+      (value 10µF)
+      (footprint Capacitors_Tantalum_SMD:CP_Tantalum_Case-D_EIA-7343-31_Hand)
+      (libsource (lib Device) (part C) (description "Unpolarized capacitor"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5B8B090B))
+    (comp (ref C4)
+      (value 100nF)
+      (footprint Capacitors_SMD:C_1206_HandSoldering)
+      (libsource (lib Device) (part C) (description "Unpolarized capacitor"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5B8B1267))
+    (comp (ref U1)
+      (value ATTINY2313A-SU)
+      (footprint Housings_SOIC:SOIC-20W_7.5x12.8mm_Pitch1.27mm)
+      (libsource (lib MCU_Microchip_ATtiny) (part ATtiny2313A-SU) (description "20MHz, 2kB Flash, 128B SRAM, 128B EEPROM, SOIC-20"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5B8AD3B8))
+    (comp (ref C2)
+      (value 33pF)
+      (footprint Capacitors_SMD:C_1206_HandSoldering)
+      (libsource (lib Device) (part C) (description "Unpolarized capacitor"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5B8B93C9))
+    (comp (ref C1)
+      (value 33pF)
+      (footprint Capacitors_SMD:C_1206_HandSoldering)
+      (libsource (lib Device) (part C) (description "Unpolarized capacitor"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5B8B9824))
+    (comp (ref XTAL1)
+      (value "8 Mhz")
+      (footprint Crystals:Crystal_HC49-U_Vertical)
+      (libsource (lib Device) (part Crystal_Small) (description "Two pin crystal, small symbol"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5B8B9A62))
+    (comp (ref R1)
+      (value 10K)
+      (footprint Resistors_SMD:R_0603_HandSoldering)
+      (libsource (lib Device) (part R) (description Resistor))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5B8C2380))
+    (comp (ref P7)
+      (value SSD1306)
+      (footprint Pin_Headers:Pin_Header_Straight_1x04_Pitch2.54mm)
+      (libsource (lib Connector_Generic) (part Conn_01x04) (description "Generic connector, single row, 01x04, script generated (kicad-library-utils/schlib/autogen/connector/)"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5B8C32B0))
+    (comp (ref Q1)
+      (value IRLB8721PBF)
+      (footprint TO_SOT_Packages_THT:TO-220-3_Horizontal)
+      (libsource (lib Transistor_FET) (part IRLB8721PBF) (description "62A Id, 30V Vds, N-Channel MOSFET, TO-220"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5B8C8EA8))
+    (comp (ref R2)
+      (value 150)
+      (footprint Resistors_SMD:R_0603_HandSoldering)
+      (libsource (lib Device) (part R) (description Resistor))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5B8CAD1E))
+    (comp (ref R3)
+      (value 150)
+      (footprint Resistors_SMD:R_0603_HandSoldering)
+      (libsource (lib Device) (part R) (description Resistor))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5B8CAE68))
+    (comp (ref Q2)
+      (value IRLB8721PBF)
+      (footprint TO_SOT_Packages_THT:TO-220-3_Horizontal)
+      (libsource (lib Transistor_FET) (part IRLB8721PBF) (description "62A Id, 30V Vds, N-Channel MOSFET, TO-220"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5B8CB00E))
+    (comp (ref P4)
+      (value LED)
+      (footprint Terminal_Blocks:TerminalBlock_bornier-4_P5.08mm)
+      (libsource (lib Connector_Generic) (part Conn_01x04) (description "Generic connector, single row, 01x04, script generated (kicad-library-utils/schlib/autogen/connector/)"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5B8CBF27))
+    (comp (ref R4)
+      (value 10K)
+      (footprint Resistors_SMD:R_0603_HandSoldering)
+      (libsource (lib Device) (part R) (description Resistor))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5B8C6BF9))
+    (comp (ref R5)
+      (value 10K)
+      (footprint Resistors_SMD:R_0603_HandSoldering)
+      (libsource (lib Device) (part R) (description Resistor))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5B925FBE))
+    (comp (ref J1)
+      (value PROG)
+      (footprint Pin_Headers:Pin_Header_Straight_2x03_Pitch2.54mm)
+      (datasheet ~)
+      (libsource (lib Connector_Generic) (part Conn_02x03_Counter_Clockwise) (description "Generic connector, double row, 02x03, counter clockwise pin numbering scheme (similar to DIP packge numbering), script generated (kicad-library-utils/schlib/autogen/connector/)"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5BEBD38C))
+    (comp (ref SW1)
+      (value Button)
+      (footprint SMD-BUTTON_4P-5.2X5.2X1.5MM-SKQGAKE010_:SW4-SMD-5.2X5.2X1.5MM)
+      (libsource (lib Switch) (part SW_Push) (description "Push button switch, generic, two pins"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5BF329CF)))
+  (libparts
+    (libpart (lib AMS1117-5.0) (part AMS1117-5.0)
+      (fields
+        (field (name Reference) U)
+        (field (name Value) AMS1117-5.0)
+        (field (name Footprint) SOT229P700X180-4N)
+        (field (name Datasheet) "Sot223/Pkg 1-Amp 5-Volt Low Drop Out Voltage Regulatator")
+        (field (name Field4) Unavailable)
+        (field (name Field5) "Advanced Monolithic Systems")
+        (field (name Field6) None)
+        (field (name Field7) None)
+        (field (name Field8) AMS1117-5.0))
+      (pins
+        (pin (num 1) (name ADJ/GND) (type power_in))
+        (pin (num 2) (name VOUT) (type output))
+        (pin (num 3) (name VIN) (type input))))
+    (libpart (lib Connector_Generic) (part Conn_01x02)
+      (description "Generic connector, single row, 01x02, script generated (kicad-library-utils/schlib/autogen/connector/)")
+      (docs ~)
+      (footprints
+        (fp Connector*:*_1x??_*))
+      (fields
+        (field (name Reference) J)
+        (field (name Value) Conn_01x02))
+      (pins
+        (pin (num 1) (name Pin_1) (type passive))
+        (pin (num 2) (name Pin_2) (type passive))))
+    (libpart (lib Connector_Generic) (part Conn_01x04)
+      (description "Generic connector, single row, 01x04, script generated (kicad-library-utils/schlib/autogen/connector/)")
+      (docs ~)
+      (footprints
+        (fp Connector*:*_1x??_*))
+      (fields
+        (field (name Reference) J)
+        (field (name Value) Conn_01x04))
+      (pins
+        (pin (num 1) (name Pin_1) (type passive))
+        (pin (num 2) (name Pin_2) (type passive))
+        (pin (num 3) (name Pin_3) (type passive))
+        (pin (num 4) (name Pin_4) (type passive))))
+    (libpart (lib Connector_Generic) (part Conn_01x06)
+      (description "Generic connector, single row, 01x06, script generated (kicad-library-utils/schlib/autogen/connector/)")
+      (docs ~)
+      (footprints
+        (fp Connector*:*_1x??_*))
+      (fields
+        (field (name Reference) J)
+        (field (name Value) Conn_01x06))
+      (pins
+        (pin (num 1) (name Pin_1) (type passive))
+        (pin (num 2) (name Pin_2) (type passive))
+        (pin (num 3) (name Pin_3) (type passive))
+        (pin (num 4) (name Pin_4) (type passive))
+        (pin (num 5) (name Pin_5) (type passive))
+        (pin (num 6) (name Pin_6) (type passive))))
+    (libpart (lib Connector_Generic) (part Conn_02x03_Counter_Clockwise)
+      (description "Generic connector, double row, 02x03, counter clockwise pin numbering scheme (similar to DIP packge numbering), script generated (kicad-library-utils/schlib/autogen/connector/)")
+      (docs ~)
+      (footprints
+        (fp Connector*:*_2x??_*))
+      (fields
+        (field (name Reference) J)
+        (field (name Value) Conn_02x03_Counter_Clockwise))
+      (pins
+        (pin (num 1) (name Pin_1) (type passive))
+        (pin (num 2) (name Pin_2) (type passive))
+        (pin (num 3) (name Pin_3) (type passive))
+        (pin (num 4) (name Pin_4) (type passive))
+        (pin (num 5) (name Pin_5) (type passive))
+        (pin (num 6) (name Pin_6) (type passive))))
+    (libpart (lib Device) (part C)
+      (description "Unpolarized capacitor")
+      (docs ~)
+      (footprints
+        (fp C_*))
+      (fields
+        (field (name Reference) C)
+        (field (name Value) C))
+      (pins
+        (pin (num 1) (name ~) (type passive))
+        (pin (num 2) (name ~) (type passive))))
+    (libpart (lib Device) (part Crystal_Small)
+      (description "Two pin crystal, small symbol")
+      (docs ~)
+      (footprints
+        (fp Crystal*))
+      (fields
+        (field (name Reference) Y)
+        (field (name Value) Crystal_Small))
+      (pins
+        (pin (num 1) (name 1) (type passive))
+        (pin (num 2) (name 2) (type passive))))
+    (libpart (lib Device) (part R)
+      (description Resistor)
+      (docs ~)
+      (footprints
+        (fp R_*))
+      (fields
+        (field (name Reference) R)
+        (field (name Value) R))
+      (pins
+        (pin (num 1) (name ~) (type passive))
+        (pin (num 2) (name ~) (type passive))))
+    (libpart (lib MAX485) (part MAX485)
+      (footprints
+        (fp DIL08)
+        (fp SO08))
+      (fields
+        (field (name Reference) U)
+        (field (name Value) MAX485)
+        (field (name Datasheet) "Maxim Integrated")
+        (field (name Field4) None)
+        (field (name Field5) Unavailable)
+        (field (name Field6) None)
+        (field (name Field7) MAX485))
+      (pins
+        (pin (num 1) (name RO) (type BiDi))
+        (pin (num 2) (name RE) (type BiDi))
+        (pin (num 3) (name DE) (type BiDi))
+        (pin (num 4) (name DI) (type BiDi))
+        (pin (num 5) (name GND) (type power_in))
+        (pin (num 6) (name A) (type BiDi))
+        (pin (num 7) (name B) (type BiDi))
+        (pin (num 8) (name VCC) (type power_in))))
+    (libpart (lib MCU_Microchip_ATtiny) (part ATtiny2313V-10SU)
+      (aliases
+        (alias ATtiny2313-20SU)
+        (alias ATtiny2313A-SU)
+        (alias ATtiny4313-SU))
+      (description "10MHz, 2kB Flash, 128B SRAM, 128B EEPROM, debugWIRE, SOIC-20")
+      (docs http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-2543-AVR-ATtiny2313_Datasheet.pdf)
+      (footprints
+        (fp SOIC*7.5x12.8mm*P1.27mm*))
+      (fields
+        (field (name Reference) U)
+        (field (name Value) ATtiny2313V-10SU)
+        (field (name Footprint) Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm))
+      (pins
+        (pin (num 1) (name PA2/~RESET) (type 3state))
+        (pin (num 2) (name PD0) (type 3state))
+        (pin (num 3) (name PD1) (type 3state))
+        (pin (num 4) (name PA1/XTAL2) (type 3state))
+        (pin (num 5) (name PA0/XTAL1) (type 3state))
+        (pin (num 6) (name PD2) (type 3state))
+        (pin (num 7) (name PD3) (type 3state))
+        (pin (num 8) (name PD4) (type 3state))
+        (pin (num 9) (name PD5) (type 3state))
+        (pin (num 10) (name GND) (type power_in))
+        (pin (num 11) (name PD6) (type 3state))
+        (pin (num 12) (name PB0) (type 3state))
+        (pin (num 13) (name PB1) (type 3state))
+        (pin (num 14) (name PB2) (type 3state))
+        (pin (num 15) (name PB3) (type 3state))
+        (pin (num 16) (name PB4) (type 3state))
+        (pin (num 17) (name PB5) (type 3state))
+        (pin (num 18) (name PB6) (type 3state))
+        (pin (num 19) (name PB7) (type 3state))
+        (pin (num 20) (name VCC) (type power_in))))
+    (libpart (lib PCA9685-TSSOP) (part PCA9685-TSSOP)
+      (fields
+        (field (name Reference) U)
+        (field (name Value) PCA9685-TSSOP)
+        (field (name Footprint) MODULE)
+        (field (name Datasheet) DOCUMENTATION))
+      (pins
+        (pin (num 1) (name A0) (type input))
+        (pin (num 2) (name A1) (type input))
+        (pin (num 3) (name A2) (type input))
+        (pin (num 4) (name A3) (type input))
+        (pin (num 5) (name A4) (type input))
+        (pin (num 6) (name LED0) (type output))
+        (pin (num 7) (name LED1) (type output))
+        (pin (num 8) (name LED2) (type output))
+        (pin (num 9) (name LED3) (type output))
+        (pin (num 10) (name LED4) (type output))
+        (pin (num 11) (name LED5) (type output))
+        (pin (num 12) (name LED6) (type output))
+        (pin (num 13) (name LED7) (type output))
+        (pin (num 14) (name GND) (type input))
+        (pin (num 15) (name LED8) (type output))
+        (pin (num 16) (name LED9) (type output))
+        (pin (num 17) (name LED10) (type output))
+        (pin (num 18) (name LED11) (type output))
+        (pin (num 19) (name LED12) (type output))
+        (pin (num 20) (name LED13) (type output))
+        (pin (num 21) (name LED14) (type output))
+        (pin (num 22) (name LED15) (type output))
+        (pin (num 23) (name OE) (type input))
+        (pin (num 24) (name A5) (type input))
+        (pin (num 25) (name EXTCLK) (type input))
+        (pin (num 26) (name SCL) (type input))
+        (pin (num 27) (name SDA) (type BiDi))
+        (pin (num 28) (name VCC) (type input))))
+    (libpart (lib Switch) (part SW_Push)
+      (description "Push button switch, generic, two pins")
+      (fields
+        (field (name Reference) SW)
+        (field (name Value) SW_Push))
+      (pins
+        (pin (num 1) (name 1) (type passive))
+        (pin (num 2) (name 2) (type passive))))
+    (libpart (lib Transistor_FET) (part BUZ11)
+      (aliases
+        (alias IRF3205)
+        (alias IRF540N)
+        (alias IRF740)
+        (alias IRLB8721PBF)
+        (alias IRLZ34N)
+        (alias IRLZ44N))
+      (description "30A Id, 50V Vds, N-Channel Power MOSFET, TO-220")
+      (docs http://www.fairchildsemi.com/ds/BU/BUZ11.pdf)
+      (footprints
+        (fp TO?220*))
+      (fields
+        (field (name Reference) Q)
+        (field (name Value) BUZ11)
+        (field (name Footprint) Package_TO_SOT_THT:TO-220-3_Vertical))
+      (pins
+        (pin (num 1) (name G) (type input))
+        (pin (num 2) (name D) (type passive))
+        (pin (num 3) (name S) (type passive)))))
+  (libraries
+    (library (logical AMS1117-5.0)
+      (uri P:\Electronics\Stairs\kicad/libs/AMS1117-5.0.lib))
+    (library (logical Connector_Generic)
+      (uri "C:\\Program Files\\KiCad\\share\\kicad\\library/Connector_Generic.lib"))
+    (library (logical Device)
+      (uri "C:\\Program Files\\KiCad\\share\\kicad\\library/Device.lib"))
+    (library (logical MAX485)
+      (uri P:\Electronics\Stairs\kicad/libs/MAX485.lib))
+    (library (logical MCU_Microchip_ATtiny)
+      (uri "C:\\Program Files\\KiCad\\share\\kicad\\library/MCU_Microchip_ATtiny.lib"))
+    (library (logical PCA9685-TSSOP)
+      (uri P:\Electronics\Stairs\kicad/libs/PCA9685-TSSOP.lib))
+    (library (logical Switch)
+      (uri "C:\\Program Files\\KiCad\\share\\kicad\\library/Switch.lib"))
+    (library (logical Transistor_FET)
+      (uri "C:\\Program Files\\KiCad\\share\\kicad\\library/Transistor_FET.lib")))
+  (nets
+    (net (code 1) (name "Net-(PCA9685-Pad25)")
+      (node (ref PCA9685) (pin 25)))
+    (net (code 2) (name "Net-(PCA9685-Pad15)")
+      (node (ref PCA9685) (pin 15)))
+    (net (code 3) (name "Net-(PCA9685-Pad16)")
+      (node (ref PCA9685) (pin 16)))
+    (net (code 4) (name "Net-(PCA9685-Pad17)")
+      (node (ref PCA9685) (pin 17)))
+    (net (code 5) (name "Net-(PCA9685-Pad18)")
+      (node (ref PCA9685) (pin 18)))
+    (net (code 6) (name "Net-(PCA9685-Pad19)")
+      (node (ref PCA9685) (pin 19)))
+    (net (code 7) (name "Net-(PCA9685-Pad20)")
+      (node (ref PCA9685) (pin 20)))
+    (net (code 8) (name /PD)
+      (node (ref R4) (pin 1))
+      (node (ref PCA9685) (pin 5))
+      (node (ref PCA9685) (pin 4))
+      (node (ref PCA9685) (pin 23))
+      (node (ref PCA9685) (pin 24))
+      (node (ref PCA9685) (pin 3))
+      (node (ref PCA9685) (pin 2))
+      (node (ref PCA9685) (pin 1)))
+    (net (code 9) (name GND)
+      (node (ref J1) (pin 4))
+      (node (ref AMS1117) (pin 1))
+      (node (ref U1) (pin 10))
+      (node (ref P3) (pin 5))
+      (node (ref SW1) (pin 2))
+      (node (ref C4) (pin 1))
+      (node (ref C3) (pin 1))
+      (node (ref C2) (pin 2))
+      (node (ref C1) (pin 2))
+      (node (ref Q1) (pin 3))
+      (node (ref P7) (pin 4))
+      (node (ref U2) (pin 5))
+      (node (ref P6) (pin 1))
+      (node (ref P5) (pin 2))
+      (node (ref P3) (pin 2))
+      (node (ref PCA9685) (pin 14))
+      (node (ref R4) (pin 2))
+      (node (ref Q2) (pin 3)))
+    (net (code 10) (name "Net-(PCA9685-Pad21)")
+      (node (ref PCA9685) (pin 21)))
+    (net (code 11) (name "Net-(P4-Pad3)")
+      (node (ref P4) (pin 3))
+      (node (ref Q1) (pin 2)))
+    (net (code 12) (name +12V)
+      (node (ref AMS1117) (pin 3))
+      (node (ref P6) (pin 2))
+      (node (ref P4) (pin 4))
+      (node (ref P5) (pin 1))
+      (node (ref P4) (pin 2)))
+    (net (code 13) (name "Net-(P4-Pad1)")
+      (node (ref Q2) (pin 2))
+      (node (ref P4) (pin 1)))
+    (net (code 14) (name "Net-(PCA9685-Pad22)")
+      (node (ref PCA9685) (pin 22)))
+    (net (code 15) (name "Net-(PCA9685-Pad13)")
+      (node (ref PCA9685) (pin 13)))
+    (net (code 16) (name "Net-(PCA9685-Pad12)")
+      (node (ref PCA9685) (pin 12)))
+    (net (code 17) (name "Net-(PCA9685-Pad11)")
+      (node (ref PCA9685) (pin 11)))
+    (net (code 18) (name "Net-(PCA9685-Pad10)")
+      (node (ref PCA9685) (pin 10)))
+    (net (code 19) (name "Net-(PCA9685-Pad9)")
+      (node (ref PCA9685) (pin 9)))
+    (net (code 20) (name "Net-(PCA9685-Pad8)")
+      (node (ref PCA9685) (pin 8)))
+    (net (code 21) (name "Net-(PCA9685-Pad7)")
+      (node (ref R3) (pin 1))
+      (node (ref PCA9685) (pin 7)))
+    (net (code 22) (name "Net-(PCA9685-Pad6)")
+      (node (ref R2) (pin 1))
+      (node (ref PCA9685) (pin 6)))
+    (net (code 23) (name "Net-(Q2-Pad1)")
+      (node (ref Q2) (pin 1))
+      (node (ref R3) (pin 2)))
+    (net (code 24) (name +5V)
+      (node (ref P3) (pin 3))
+      (node (ref PCA9685) (pin 28))
+      (node (ref U2) (pin 8))
+      (node (ref P3) (pin 6))
+      (node (ref J1) (pin 6))
+      (node (ref P7) (pin 3))
+      (node (ref R5) (pin 2))
+      (node (ref R1) (pin 1))
+      (node (ref U1) (pin 20))
+      (node (ref AMS1117) (pin 2))
+      (node (ref C4) (pin 2))
+      (node (ref C3) (pin 2)))
+    (net (code 25) (name RST)
+      (node (ref J1) (pin 3))
+      (node (ref U1) (pin 1))
+      (node (ref R5) (pin 1)))
+    (net (code 26) (name MOSI)
+      (node (ref PCA9685) (pin 27))
+      (node (ref U1) (pin 17))
+      (node (ref R1) (pin 2))
+      (node (ref P7) (pin 1))
+      (node (ref J1) (pin 5)))
+    (net (code 27) (name SCK)
+      (node (ref P7) (pin 2))
+      (node (ref J1) (pin 2))
+      (node (ref U1) (pin 19))
+      (node (ref PCA9685) (pin 26)))
+    (net (code 28) (name MISO)
+      (node (ref U1) (pin 18))
+      (node (ref J1) (pin 1)))
+    (net (code 29) (name "Net-(Q1-Pad1)")
+      (node (ref R2) (pin 2))
+      (node (ref Q1) (pin 1)))
+    (net (code 30) (name "Net-(SW1-Pad1)")
+      (node (ref SW1) (pin 1))
+      (node (ref U1) (pin 12)))
+    (net (code 31) (name "Net-(P3-Pad1)")
+      (node (ref U1) (pin 7))
+      (node (ref P3) (pin 1)))
+    (net (code 32) (name "Net-(U1-Pad15)")
+      (node (ref U1) (pin 15)))
+    (net (code 33) (name "Net-(U1-Pad9)")
+      (node (ref U1) (pin 9)))
+    (net (code 34) (name "Net-(U1-Pad8)")
+      (node (ref U1) (pin 8)))
+    (net (code 35) (name "Net-(U1-Pad16)")
+      (node (ref U1) (pin 16)))
+    (net (code 36) (name "Net-(U1-Pad14)")
+      (node (ref U1) (pin 14)))
+    (net (code 37) (name "Net-(U1-Pad13)")
+      (node (ref U1) (pin 13)))
+    (net (code 38) (name "Net-(P3-Pad4)")
+      (node (ref P3) (pin 4))
+      (node (ref U1) (pin 6)))
+    (net (code 39) (name "Net-(P1-Pad1)")
+      (node (ref U2) (pin 7))
+      (node (ref P2) (pin 2))
+      (node (ref P1) (pin 1)))
+    (net (code 40) (name "Net-(U1-Pad11)")
+      (node (ref U1) (pin 11))
+      (node (ref U2) (pin 3))
+      (node (ref U2) (pin 2)))
+    (net (code 41) (name "Net-(U1-Pad2)")
+      (node (ref U2) (pin 1))
+      (node (ref U1) (pin 2)))
+    (net (code 42) (name "Net-(U1-Pad3)")
+      (node (ref U1) (pin 3))
+      (node (ref U2) (pin 4)))
+    (net (code 43) (name "Net-(C1-Pad1)")
+      (node (ref U1) (pin 4))
+      (node (ref XTAL1) (pin 2))
+      (node (ref C1) (pin 1)))
+    (net (code 44) (name "Net-(C2-Pad1)")
+      (node (ref XTAL1) (pin 1))
+      (node (ref U1) (pin 5))
+      (node (ref C2) (pin 1)))
+    (net (code 45) (name "Net-(P1-Pad2)")
+      (node (ref P2) (pin 1))
+      (node (ref U2) (pin 6))
+      (node (ref P1) (pin 2)))))
--- a/kicad/Stairs.pro
+++ b/kicad/Stairs.pro
@ -0,0 +1,30 @@
+update=2-9-2018 10:38:10
+version=1
+last_client=kicad
+[pcbnew]
+version=1
+LastNetListRead=
+UseCmpFile=1
+PadDrill=0.600000000000
+PadDrillOvalY=0.600000000000
+PadSizeH=1.500000000000
+PadSizeV=1.500000000000
+PcbTextSizeV=1.500000000000
+PcbTextSizeH=1.500000000000
+PcbTextThickness=0.300000000000
+ModuleTextSizeV=1.000000000000
+ModuleTextSizeH=1.000000000000
+ModuleTextSizeThickness=0.150000000000
+SolderMaskClearance=0.000000000000
+SolderMaskMinWidth=0.000000000000
+DrawSegmentWidth=0.200000000000
+BoardOutlineThickness=0.100000000000
+ModuleOutlineThickness=0.150000000000
+[cvpcb]
+version=1
+NetIExt=net
+[general]
+version=1
+[eeschema]
+version=1
+LibDir=
--- a/kicad/Stairs.sch
+++ b/kicad/Stairs.sch
@ -0,0 +1,992 @@
+EESchema Schematic File Version 4
+LIBS:Stairs-cache
+EELAYER 26 0
+EELAYER END
+$Descr A4 11693 8268
+encoding utf-8
+Sheet 1 1
+Title "Stairs submodule"
+Date "2018-09-02"
+Rev "1"
+Comp "Mark van Renswoude"
+Comment1 ""
+Comment2 ""
+Comment3 ""
+Comment4 ""
+$EndDescr
+$Comp
+L PCA9685-TSSOP:PCA9685-TSSOP PCA9685
+U 1 1 5B8AD5C2
+P 7950 2600
+F 0 "PCA9685" H 7950 3615 50  0000 C CNN
+F 1 "PCA9685-TSSOP" H 7950 3524 50  0000 C CNN
+F 2 "Housings_SSOP:TSSOP-28_4.4x9.7mm_Pitch0.65mm" H 7950 2600 50  0001 C CNN
+F 3 "DOCUMENTATION" H 7950 2600 50  0001 C CNN
+	1    7950 2600
+	1    0    0    -1  
+$EndComp
+$Comp
+L MAX485:MAX485 U2
+U 1 1 5B8AD72A
+P 6050 5050
+F 0 "U2" H 6050 5517 50  0000 C CNN
+F 1 "MAX485" H 6050 5426 50  0000 C CNN
+F 2 "Housings_SOIC:SO-8_5.3x6.2mm_Pitch1.27mm" H 6050 5050 60  0001 C CNN
+F 3 "Maxim Integrated" H 6050 5050 50  0001 L BNN
+F 4 "None" H 6050 5050 50  0001 L BNN "Field4"
+F 5 "Unavailable" H 6050 5050 50  0001 L BNN "Field5"
+F 6 "None" H 6050 5050 50  0001 L BNN "Field6"
+F 7 "MAX485" H 6050 5050 50  0001 L BNN "Field7"
+F 8 "" H 6050 5050 50  0001 L BNN "Field8"
+	1    6050 5050
+	1    0    0    -1  
+$EndComp
+$Comp
+L Connector_Generic:Conn_01x02 P6
+U 1 1 5B8AD8CA
+P 4650 6700
+F 0 "P6" H 4728 6741 50  0000 L CNN
+F 1 "PWR_IN" H 4728 6650 50  0000 L CNN
+F 2 "Terminal_Blocks:TerminalBlock_bornier-2_P5.08mm" H 4650 6700 50  0001 C CNN
+F 3 "" H 4650 6700 50  0001 C CNN
+	1    4650 6700
+	1    0    0    1   
+$EndComp
+$Comp
+L Connector_Generic:Conn_01x02 P5
+U 1 1 5B8ADA74
+P 3400 6600
+F 0 "P5" H 3700 6550 50  0000 C CNN
+F 1 "PWR_OUT" H 3750 6650 50  0000 C CNN
+F 2 "Terminal_Blocks:TerminalBlock_bornier-2_P5.08mm" H 3400 6600 50  0001 C CNN
+F 3 "" H 3400 6600 50  0001 C CNN
+	1    3400 6600
+	-1   0    0    -1  
+$EndComp
+$Comp
+L Connector_Generic:Conn_01x06 P3
+U 1 1 5B8AE6A5
+P 5700 6050
+F 0 "P3" H 5778 6091 50  0000 L CNN
+F 1 "SENSOR" H 5778 6000 50  0000 L CNN
+F 2 "Terminal_Blocks:TerminalBlock_bornier-6_P5.08mm" H 5700 6050 50  0001 C CNN
+F 3 "" H 5700 6050 50  0001 C CNN
+	1    5700 6050
+	1    0    0    1   
+$EndComp
+$Comp
+L Connector_Generic:Conn_01x02 P1
+U 1 1 5B8AE987
+P 7250 4650
+F 0 "P1" H 7328 4691 50  0000 L CNN
+F 1 "DATA_IN" H 7328 4600 50  0000 L CNN
+F 2 "Terminal_Blocks:TerminalBlock_bornier-2_P5.08mm" H 7250 4650 50  0001 C CNN
+F 3 "" H 7250 4650 50  0001 C CNN
+	1    7250 4650
+	0    1    -1   0   
+$EndComp
+$Comp
+L Connector_Generic:Conn_01x02 P2
+U 1 1 5B8AE9DD
+P 7250 5350
+F 0 "P2" H 7550 5300 50  0000 C CNN
+F 1 "DATA_OUT" H 7600 5400 50  0000 C CNN
+F 2 "Terminal_Blocks:TerminalBlock_bornier-2_P5.08mm" H 7250 5350 50  0001 C CNN
+F 3 "" H 7250 5350 50  0001 C CNN
+	1    7250 5350
+	0    1    1    0   
+$EndComp
+$Comp
+L AMS1117-5.0:AMS1117-5.0 AMS1117
+U 1 1 5B8AFB24
+P 2450 2150
+F 0 "AMS1117" H 2450 2517 50  0000 C CNN
+F 1 "AMS1117-5" H 2450 2426 50  0000 C CNN
+F 2 "AMS1117-5.0:SOT229P700X180-4N" H 2450 2150 50  0001 L BNN
+F 3 "AMS1117-5.0" H 2450 2150 50  0001 L BNN
+F 4 "None" H 2450 2150 50  0001 L BNN "Field4"
+F 5 "Unavailable" H 2450 2150 50  0001 L BNN "Field5"
+F 6 "Sot223/Pkg 1-Amp 3.3-Volt Low Drop Out Voltage Regulatator" H 2450 2150 50  0001 L BNN "Field6"
+F 7 "Advanced Monolithic Systems" H 2450 2150 50  0001 L BNN "Field7"
+F 8 "None" H 2450 2150 50  0001 L BNN "Field8"
+	1    2450 2150
+	1    0    0    -1  
+$EndComp
+$Comp
+L power:GND #PWR05
+U 1 1 5B8AFFEE
+P 3200 2400
+F 0 "#PWR05" H 3200 2150 50  0001 C CNN
+F 1 "GND" H 3205 2227 50  0000 C CNN
+F 2 "" H 3200 2400 50  0001 C CNN
+F 3 "" H 3200 2400 50  0001 C CNN
+	1    3200 2400
+	1    0    0    -1  
+$EndComp
+$Comp
+L power:+12V #PWR02
+U 1 1 5B8B02AC
+P 1700 1900
+F 0 "#PWR02" H 1700 1750 50  0001 C CNN
+F 1 "+12V" H 1715 2073 50  0000 C CNN
+F 2 "" H 1700 1900 50  0001 C CNN
+F 3 "" H 1700 1900 50  0001 C CNN
+	1    1700 1900
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	1700 1900 1700 2050
+Wire Wire Line
+	1700 2050 1850 2050
+Wire Wire Line
+	3050 2050 3200 2050
+Wire Wire Line
+	3200 2050 3200 1900
+Wire Wire Line
+	3050 2250 3200 2250
+Wire Wire Line
+	3200 2250 3200 2400
+$Comp
+L Device:C C3
+U 1 1 5B8B090B
+P 4450 3500
+F 0 "C3" H 4565 3546 50  0000 L CNN
+F 1 "10µF" H 4565 3455 50  0000 L CNN
+F 2 "Capacitors_Tantalum_SMD:CP_Tantalum_Case-D_EIA-7343-31_Hand" H 4488 3350 50  0001 C CNN
+F 3 "" H 4450 3500 50  0001 C CNN
+	1    4450 3500
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:C C4
+U 1 1 5B8B1267
+P 4950 3500
+F 0 "C4" H 5065 3546 50  0000 L CNN
+F 1 "100nF" H 5065 3455 50  0000 L CNN
+F 2 "Capacitors_SMD:C_1206_HandSoldering" H 4988 3350 50  0001 C CNN
+F 3 "" H 4950 3500 50  0001 C CNN
+	1    4950 3500
+	1    0    0    -1  
+$EndComp
+$Comp
+L power:GND #PWR011
+U 1 1 5B8B1C8E
+P 4000 5850
+F 0 "#PWR011" H 4000 5600 50  0001 C CNN
+F 1 "GND" H 4005 5677 50  0000 C CNN
+F 2 "" H 4000 5850 50  0001 C CNN
+F 3 "" H 4000 5850 50  0001 C CNN
+	1    4000 5850
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	4000 5750 4000 5850
+$Comp
+L power:GND #PWR013
+U 1 1 5B8B3466
+P 6750 5150
+F 0 "#PWR013" H 6750 4900 50  0001 C CNN
+F 1 "GND" H 6755 4977 50  0000 C CNN
+F 2 "" H 6750 5150 50  0001 C CNN
+F 3 "" H 6750 5150 50  0001 C CNN
+	1    6750 5150
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	6650 4850 6750 4850
+Wire Wire Line
+	6650 5150 6750 5150
+$Comp
+L power:GND #PWR010
+U 1 1 5B8B3A20
+P 7050 3250
+F 0 "#PWR010" H 7050 3000 50  0001 C CNN
+F 1 "GND" H 7055 3077 50  0000 C CNN
+F 2 "" H 7050 3250 50  0001 C CNN
+F 3 "" H 7050 3250 50  0001 C CNN
+	1    7050 3250
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	7050 3250 7200 3250
+Wire Wire Line
+	8850 1950 8700 1950
+$Comp
+L power:+5V #PWR03
+U 1 1 5B8B883E
+P 3200 1900
+F 0 "#PWR03" H 3200 1750 50  0001 C CNN
+F 1 "+5V" H 3215 2073 50  0000 C CNN
+F 2 "" H 3200 1900 50  0001 C CNN
+F 3 "" H 3200 1900 50  0001 C CNN
+	1    3200 1900
+	1    0    0    -1  
+$EndComp
+$Comp
+L power:+5V #PWR06
+U 1 1 5B8B8A0A
+P 4000 3500
+F 0 "#PWR06" H 4000 3350 50  0001 C CNN
+F 1 "+5V" H 4015 3673 50  0000 C CNN
+F 2 "" H 4000 3500 50  0001 C CNN
+F 3 "" H 4000 3500 50  0001 C CNN
+	1    4000 3500
+	1    0    0    -1  
+$EndComp
+$Comp
+L power:+5V #PWR012
+U 1 1 5B8B8BF6
+P 6750 4850
+F 0 "#PWR012" H 6750 4700 50  0001 C CNN
+F 1 "+5V" H 6765 5023 50  0000 C CNN
+F 2 "" H 6750 4850 50  0001 C CNN
+F 3 "" H 6750 4850 50  0001 C CNN
+	1    6750 4850
+	1    0    0    -1  
+$EndComp
+$Comp
+L power:+5V #PWR07
+U 1 1 5B8B8E5A
+P 8850 1950
+F 0 "#PWR07" H 8850 1800 50  0001 C CNN
+F 1 "+5V" H 8865 2123 50  0000 C CNN
+F 2 "" H 8850 1950 50  0001 C CNN
+F 3 "" H 8850 1950 50  0001 C CNN
+	1    8850 1950
+	1    0    0    -1  
+$EndComp
+$Comp
+L MCU_Microchip_ATtiny:ATtiny2313A-SU U1
+U 1 1 5B8AD3B8
+P 4000 4750
+F 0 "U1" H 4000 6400 50  0000 C CNN
+F 1 "ATTINY2313A-SU" H 4000 6300 50  0000 C CNN
+F 2 "Housings_SOIC:SOIC-20W_7.5x12.8mm_Pitch1.27mm" H 4000 4750 50  0001 C CIN
+F 3 "" H 4000 4750 50  0001 C CNN
+	1    4000 4750
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:C C2
+U 1 1 5B8B93C9
+P 2350 4000
+F 0 "C2" H 2465 4046 50  0000 L CNN
+F 1 "33pF" H 2465 3955 50  0000 L CNN
+F 2 "Capacitors_SMD:C_1206_HandSoldering" H 2388 3850 50  0001 C CNN
+F 3 "" H 2350 4000 50  0001 C CNN
+	1    2350 4000
+	0    1    1    0   
+$EndComp
+$Comp
+L Device:C C1
+U 1 1 5B8B9824
+P 2350 4500
+F 0 "C1" H 2465 4546 50  0000 L CNN
+F 1 "33pF" H 2465 4455 50  0000 L CNN
+F 2 "Capacitors_SMD:C_1206_HandSoldering" H 2388 4350 50  0001 C CNN
+F 3 "" H 2350 4500 50  0001 C CNN
+	1    2350 4500
+	0    1    1    0   
+$EndComp
+$Comp
+L Device:Crystal_Small XTAL1
+U 1 1 5B8B9A62
+P 2600 4250
+F 0 "XTAL1" V 2554 4338 50  0000 L CNN
+F 1 "8 Mhz" V 2645 4338 50  0000 L CNN
+F 2 "Crystals:Crystal_HC49-U_Vertical" H 2600 4250 50  0001 C CNN
+F 3 "" H 2600 4250 50  0001 C CNN
+	1    2600 4250
+	0    1    1    0   
+$EndComp
+Wire Wire Line
+	3400 4350 2600 4350
+Wire Wire Line
+	2600 4000 2500 4000
+Wire Wire Line
+	2600 4350 2600 4500
+Wire Wire Line
+	2600 4500 2500 4500
+Wire Wire Line
+	3400 4150 2600 4150
+Wire Wire Line
+	2600 4150 2600 4000
+$Comp
+L power:GND #PWR09
+U 1 1 5B8B9DAC
+P 2100 4500
+F 0 "#PWR09" H 2100 4250 50  0001 C CNN
+F 1 "GND" H 2105 4327 50  0000 C CNN
+F 2 "" H 2100 4500 50  0001 C CNN
+F 3 "" H 2100 4500 50  0001 C CNN
+	1    2100 4500
+	1    0    0    -1  
+$EndComp
+$Comp
+L power:GND #PWR08
+U 1 1 5B8B9E4D
+P 2100 4000
+F 0 "#PWR08" H 2100 3750 50  0001 C CNN
+F 1 "GND" H 2105 3827 50  0000 C CNN
+F 2 "" H 2100 4000 50  0001 C CNN
+F 3 "" H 2100 4000 50  0001 C CNN
+	1    2100 4000
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	2200 4000 2100 4000
+Wire Wire Line
+	2200 4500 2100 4500
+Wire Wire Line
+	6650 5050 7250 5050
+Wire Wire Line
+	7250 5000 7250 5050
+Wire Wire Line
+	6650 4950 7050 4950
+Wire Wire Line
+	7250 4950 7250 4850
+Wire Wire Line
+	7150 4850 7150 5000
+Wire Wire Line
+	7150 5000 7250 5000
+Connection ~ 7250 5050
+Wire Wire Line
+	7150 5150 7050 5150
+Wire Wire Line
+	7050 5150 7050 4950
+Connection ~ 7050 4950
+Wire Wire Line
+	5450 4950 5300 4950
+Wire Wire Line
+	5300 4950 5300 5050
+Wire Wire Line
+	5300 5050 5450 5050
+$Comp
+L Device:R R1
+U 1 1 5B8C2380
+P 4900 4150
+F 0 "R1" H 4970 4196 50  0000 L CNN
+F 1 "10K" H 4970 4105 50  0000 L CNN
+F 2 "Resistors_SMD:R_0603_HandSoldering" V 4830 4150 50  0001 C CNN
+F 3 "" H 4900 4150 50  0001 C CNN
+	1    4900 4150
+	1    0    0    -1  
+$EndComp
+$Comp
+L power:+5V #PWR014
+U 1 1 5B8C2462
+P 4900 3950
+F 0 "#PWR014" H 4900 3800 50  0001 C CNN
+F 1 "+5V" H 4915 4123 50  0000 C CNN
+F 2 "" H 4900 3950 50  0001 C CNN
+F 3 "" H 4900 3950 50  0001 C CNN
+	1    4900 3950
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	4900 3950 4900 4000
+Wire Wire Line
+	4600 4450 4900 4450
+Wire Wire Line
+	4900 4450 4900 4300
+$Comp
+L Connector_Generic:Conn_01x04 P7
+U 1 1 5B8C32B0
+P 9800 2150
+F 0 "P7" H 9877 2191 50  0000 L CNN
+F 1 "SSD1306" H 9877 2100 50  0000 L CNN
+F 2 "Pin_Headers:Pin_Header_Straight_1x04_Pitch2.54mm" H 9800 2150 50  0001 C CNN
+F 3 "" H 9800 2150 50  0001 C CNN
+	1    9800 2150
+	1    0    0    -1  
+$EndComp
+Text Notes 10350 2400 0    60   ~ 0
+1 = SDA\n2 = SCL\n3 = VCC\n4 = GND
+$Comp
+L power:+5V #PWR016
+U 1 1 5B8C452D
+P 9350 2250
+F 0 "#PWR016" H 9350 2100 50  0001 C CNN
+F 1 "+5V" H 9365 2423 50  0000 C CNN
+F 2 "" H 9350 2250 50  0001 C CNN
+F 3 "" H 9350 2250 50  0001 C CNN
+	1    9350 2250
+	-1   0    0    1   
+$EndComp
+$Comp
+L power:GND #PWR018
+U 1 1 5B8C457C
+P 9500 2350
+F 0 "#PWR018" H 9500 2100 50  0001 C CNN
+F 1 "GND" H 9505 2177 50  0000 C CNN
+F 2 "" H 9500 2350 50  0001 C CNN
+F 3 "" H 9500 2350 50  0001 C CNN
+	1    9500 2350
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	9600 2350 9500 2350
+Wire Wire Line
+	9600 2250 9350 2250
+Wire Wire Line
+	8700 2050 8950 2050
+Wire Wire Line
+	8700 2150 9150 2150
+Connection ~ 9150 2150
+Connection ~ 8950 2050
+Connection ~ 4900 4450
+Wire Wire Line
+	5150 5150 5450 5150
+$Comp
+L Transistor_FET:IRLB8721PBF Q1
+U 1 1 5B8C8EA8
+P 6050 2250
+F 0 "Q1" V 6378 2250 50  0000 C CNN
+F 1 "IRLB8721PBF" V 6287 2250 50  0000 C CNN
+F 2 "TO_SOT_Packages_THT:TO-220-3_Horizontal" H 6300 2175 50  0001 L CIN
+F 3 "" H 6050 2250 50  0001 L CNN
+	1    6050 2250
+	0    -1   -1   0   
+$EndComp
+Wire Wire Line
+	5450 4850 4600 4850
+Wire Wire Line
+	4600 4950 5150 4950
+Wire Wire Line
+	5150 4950 5150 5150
+Wire Wire Line
+	4600 4650 4700 4650
+Wire Wire Line
+	5450 4650 5450 3950
+Wire Wire Line
+	5450 3950 9150 3950
+Wire Wire Line
+	9150 3950 9150 2150
+Wire Wire Line
+	8950 2050 8950 3750
+Wire Wire Line
+	8950 3750 5250 3750
+Wire Wire Line
+	5250 3750 5250 4450
+$Comp
+L Device:R R2
+U 1 1 5B8CAD1E
+P 6700 2450
+F 0 "R2" V 6493 2450 50  0000 C CNN
+F 1 "150" V 6584 2450 50  0000 C CNN
+F 2 "Resistors_SMD:R_0603_HandSoldering" V 6630 2450 50  0001 C CNN
+F 3 "" H 6700 2450 50  0001 C CNN
+	1    6700 2450
+	0    1    1    0   
+$EndComp
+$Comp
+L Device:R R3
+U 1 1 5B8CAE68
+P 6700 2550
+F 0 "R3" V 6900 2550 50  0000 C CNN
+F 1 "150" V 6800 2550 50  0000 C CNN
+F 2 "Resistors_SMD:R_0603_HandSoldering" V 6630 2550 50  0001 C CNN
+F 3 "" H 6700 2550 50  0001 C CNN
+	1    6700 2550
+	0    1    1    0   
+$EndComp
+$Comp
+L Transistor_FET:IRLB8721PBF Q2
+U 1 1 5B8CB00E
+P 6050 2750
+F 0 "Q2" V 6286 2750 50  0000 C CNN
+F 1 "IRLB8721PBF" V 6377 2750 50  0000 C CNN
+F 2 "TO_SOT_Packages_THT:TO-220-3_Horizontal" H 6300 2675 50  0001 L CIN
+F 3 "" H 6050 2750 50  0001 L CNN
+	1    6050 2750
+	0    -1   1    0   
+$EndComp
+$Comp
+L power:GND #PWR015
+U 1 1 5B8CB569
+P 6300 2150
+F 0 "#PWR015" H 6300 1900 50  0001 C CNN
+F 1 "GND" H 6305 1977 50  0000 C CNN
+F 2 "" H 6300 2150 50  0001 C CNN
+F 3 "" H 6300 2150 50  0001 C CNN
+	1    6300 2150
+	0    -1   -1   0   
+$EndComp
+$Comp
+L power:GND #PWR020
+U 1 1 5B8CB5C8
+P 6300 2850
+F 0 "#PWR020" H 6300 2600 50  0001 C CNN
+F 1 "GND" H 6305 2677 50  0000 C CNN
+F 2 "" H 6300 2850 50  0001 C CNN
+F 3 "" H 6300 2850 50  0001 C CNN
+	1    6300 2850
+	0    -1   -1   0   
+$EndComp
+$Comp
+L Connector_Generic:Conn_01x04 P4
+U 1 1 5B8CBF27
+P 5050 2550
+F 0 "P4" H 5128 2591 50  0000 L CNN
+F 1 "LED" H 5128 2500 50  0000 L CNN
+F 2 "Terminal_Blocks:TerminalBlock_bornier-4_P5.08mm" H 5050 2550 50  0001 C CNN
+F 3 "" H 5050 2550 50  0001 C CNN
+	1    5050 2550
+	-1   0    0    1   
+$EndComp
+Text Notes 4000 2700 0    60   ~ 0
+1 = LED1 +12V\n2 = LED1 GND\n3 = LED2 +12V\n4 = LED2 GND
+Wire Wire Line
+	6250 2150 6300 2150
+Wire Wire Line
+	6250 2850 6300 2850
+$Comp
+L power:+12V #PWR017
+U 1 1 5B8CDFC1
+P 5400 2350
+F 0 "#PWR017" H 5400 2200 50  0001 C CNN
+F 1 "+12V" H 5415 2523 50  0000 C CNN
+F 2 "" H 5400 2350 50  0001 C CNN
+F 3 "" H 5400 2350 50  0001 C CNN
+	1    5400 2350
+	0    1    1    0   
+$EndComp
+$Comp
+L power:+12V #PWR019
+U 1 1 5B8CE24A
+P 5400 2550
+F 0 "#PWR019" H 5400 2400 50  0001 C CNN
+F 1 "+12V" H 5415 2723 50  0000 C CNN
+F 2 "" H 5400 2550 50  0001 C CNN
+F 3 "" H 5400 2550 50  0001 C CNN
+	1    5400 2550
+	0    1    1    0   
+$EndComp
+Wire Wire Line
+	5250 2350 5400 2350
+Wire Wire Line
+	5250 2550 5400 2550
+Wire Wire Line
+	5250 2450 5750 2450
+Wire Wire Line
+	5750 2450 5750 2150
+Wire Wire Line
+	5750 2150 5850 2150
+Wire Wire Line
+	5250 2650 5750 2650
+Wire Wire Line
+	5750 2650 5750 2850
+Wire Wire Line
+	5750 2850 5850 2850
+Wire Wire Line
+	6550 2550 6050 2550
+Wire Wire Line
+	6850 2450 7200 2450
+Wire Wire Line
+	7200 2550 6850 2550
+Wire Wire Line
+	4000 3650 4450 3650
+Connection ~ 4450 3650
+Wire Wire Line
+	4000 3650 4000 3500
+$Comp
+L power:GND #PWR022
+U 1 1 5B8D17BD
+P 4700 3250
+F 0 "#PWR022" H 4700 3000 50  0001 C CNN
+F 1 "GND" H 4705 3077 50  0000 C CNN
+F 2 "" H 4700 3250 50  0001 C CNN
+F 3 "" H 4700 3250 50  0001 C CNN
+	1    4700 3250
+	-1   0    0    1   
+$EndComp
+Wire Wire Line
+	4450 3350 4450 3250
+Wire Wire Line
+	4450 3250 4700 3250
+Wire Wire Line
+	4950 3250 4950 3350
+Connection ~ 4700 3250
+NoConn ~ 7200 2650
+NoConn ~ 7200 2750
+NoConn ~ 7200 2850
+NoConn ~ 7200 2950
+NoConn ~ 7200 3050
+NoConn ~ 7200 3150
+NoConn ~ 8700 2550
+NoConn ~ 8700 2650
+NoConn ~ 8700 2750
+NoConn ~ 8700 2850
+NoConn ~ 8700 2950
+NoConn ~ 8700 3050
+NoConn ~ 8700 3150
+NoConn ~ 8700 3250
+NoConn ~ 8700 2250
+Wire Wire Line
+	7050 4950 7250 4950
+Wire Wire Line
+	9150 2150 9600 2150
+Wire Wire Line
+	8950 2050 9600 2050
+Wire Wire Line
+	4900 4450 5250 4450
+Wire Wire Line
+	4450 3650 4950 3650
+Wire Wire Line
+	4700 3250 4950 3250
+Wire Wire Line
+	7200 2350 7100 2350
+Wire Wire Line
+	7100 2350 7100 2250
+Wire Wire Line
+	7200 1950 7100 1950
+Connection ~ 7100 1950
+Wire Wire Line
+	7100 1950 7100 1850
+Wire Wire Line
+	7200 2050 7100 2050
+Connection ~ 7100 2050
+Wire Wire Line
+	7100 2050 7100 1950
+Wire Wire Line
+	7200 2150 7100 2150
+Connection ~ 7100 2150
+Wire Wire Line
+	7100 2150 7100 2050
+Wire Wire Line
+	7200 2250 7100 2250
+Connection ~ 7100 2250
+Wire Wire Line
+	7100 2250 7100 2150
+$Comp
+L Device:R R4
+U 1 1 5B8C6BF9
+P 7100 1700
+F 0 "R4" V 6893 1700 50  0000 C CNN
+F 1 "10K" V 6984 1700 50  0000 C CNN
+F 2 "Resistors_SMD:R_0603_HandSoldering" V 7030 1700 50  0001 C CNN
+F 3 "" H 7100 1700 50  0001 C CNN
+	1    7100 1700
+	-1   0    0    1   
+$EndComp
+$Comp
+L power:GND #PWR021
+U 1 1 5B8C6F7E
+P 7100 1500
+F 0 "#PWR021" H 7100 1250 50  0001 C CNN
+F 1 "GND" H 7105 1327 50  0000 C CNN
+F 2 "" H 7100 1500 50  0001 C CNN
+F 3 "" H 7100 1500 50  0001 C CNN
+	1    7100 1500
+	-1   0    0    1   
+$EndComp
+Wire Wire Line
+	7100 1500 7100 1550
+Wire Wire Line
+	7000 1950 7100 1950
+Text Label 7000 1950 2    50   ~ 0
+PD
+Wire Wire Line
+	8800 2350 8750 2350
+Text Label 8800 2350 0    50   ~ 0
+PD
+Wire Wire Line
+	8700 2450 8750 2450
+Wire Wire Line
+	8750 2450 8750 2350
+Connection ~ 8750 2350
+Wire Wire Line
+	8750 2350 8700 2350
+Text Notes 5150 6750 0    60   ~ 0
+1 = +12V\n2 = GND
+Wire Wire Line
+	4450 6700 4000 6700
+$Comp
+L power:GND #PWR024
+U 1 1 5B8E6FA0
+P 4000 6850
+F 0 "#PWR024" H 4000 6600 50  0001 C CNN
+F 1 "GND" H 4005 6677 50  0000 C CNN
+F 2 "" H 4000 6850 50  0001 C CNN
+F 3 "" H 4000 6850 50  0001 C CNN
+	1    4000 6850
+	1    0    0    -1  
+$EndComp
+$Comp
+L power:+12V #PWR023
+U 1 1 5B8E7817
+P 4000 6500
+F 0 "#PWR023" H 4000 6350 50  0001 C CNN
+F 1 "+12V" H 4015 6673 50  0000 C CNN
+F 2 "" H 4000 6500 50  0001 C CNN
+F 3 "" H 4000 6500 50  0001 C CNN
+	1    4000 6500
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	4000 6500 4000 6600
+Connection ~ 4000 6600
+Wire Wire Line
+	4000 6600 4450 6600
+Wire Wire Line
+	4000 6850 4000 6700
+Connection ~ 4000 6700
+$Comp
+L power:+12V #PWR0101
+U 1 1 5B8ED6A9
+P 1200 1900
+F 0 "#PWR0101" H 1200 1750 50  0001 C CNN
+F 1 "+12V" H 1215 2073 50  0000 C CNN
+F 2 "" H 1200 1900 50  0001 C CNN
+F 3 "" H 1200 1900 50  0001 C CNN
+	1    1200 1900
+	1    0    0    -1  
+$EndComp
+$Comp
+L power:PWR_FLAG #FLG0101
+U 1 1 5B8ED6E0
+P 1200 1900
+F 0 "#FLG0101" H 1200 1975 50  0001 C CNN
+F 1 "PWR_FLAG" H 1200 2073 50  0000 C CNN
+F 2 "" H 1200 1900 50  0001 C CNN
+F 3 "" H 1200 1900 50  0001 C CNN
+	1    1200 1900
+	-1   0    0    1   
+$EndComp
+NoConn ~ 4600 4050
+NoConn ~ 4600 4150
+NoConn ~ 4600 4250
+NoConn ~ 4600 4350
+NoConn ~ 4600 5250
+NoConn ~ 4600 5350
+$Comp
+L Device:R R5
+U 1 1 5B925FBE
+P 3250 3800
+F 0 "R5" V 3043 3800 50  0000 C CNN
+F 1 "10K" V 3134 3800 50  0000 C CNN
+F 2 "Resistors_SMD:R_0603_HandSoldering" V 3180 3800 50  0001 C CNN
+F 3 "" H 3250 3800 50  0001 C CNN
+	1    3250 3800
+	-1   0    0    1   
+$EndComp
+$Comp
+L power:+5V #PWR0102
+U 1 1 5B92641E
+P 3250 3550
+F 0 "#PWR0102" H 3250 3400 50  0001 C CNN
+F 1 "+5V" H 3265 3723 50  0000 C CNN
+F 2 "" H 3250 3550 50  0001 C CNN
+F 3 "" H 3250 3550 50  0001 C CNN
+	1    3250 3550
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	3250 3550 3250 3650
+Wire Wire Line
+	3250 3950 3400 3950
+$Comp
+L power:GND #PWR0103
+U 1 1 5B92CB1E
+P 1200 2500
+F 0 "#PWR0103" H 1200 2250 50  0001 C CNN
+F 1 "GND" H 1205 2327 50  0000 C CNN
+F 2 "" H 1200 2500 50  0001 C CNN
+F 3 "" H 1200 2500 50  0001 C CNN
+	1    1200 2500
+	1    0    0    -1  
+$EndComp
+$Comp
+L power:PWR_FLAG #FLG0102
+U 1 1 5B92CB57
+P 1200 2500
+F 0 "#FLG0102" H 1200 2575 50  0001 C CNN
+F 1 "PWR_FLAG" H 1200 2673 50  0000 C CNN
+F 2 "" H 1200 2500 50  0001 C CNN
+F 3 "" H 1200 2500 50  0001 C CNN
+	1    1200 2500
+	1    0    0    -1  
+$EndComp
+Connection ~ 2600 4150
+Connection ~ 2600 4350
+Connection ~ 4000 3650
+Text Notes 6100 6300 0    60   ~ 0
+1 = Sensor 1 +5V\n2 = Sensor 1 GND\n3 = Sensor 1 DATA\n4 = Sensor 2 +5V\n5 = Sensor 2 GND\n6 = Sensor 2 DATA\n
+$Comp
+L power:+5V #PWR0104
+U 1 1 5B93F20D
+P 5350 5750
+F 0 "#PWR0104" H 5350 5600 50  0001 C CNN
+F 1 "+5V" H 5350 6050 50  0000 C CNN
+F 2 "" H 5350 5750 50  0001 C CNN
+F 3 "" H 5350 5750 50  0001 C CNN
+	1    5350 5750
+	0    -1   -1   0   
+$EndComp
+$Comp
+L power:+5V #PWR0105
+U 1 1 5B93F49C
+P 5350 6050
+F 0 "#PWR0105" H 5350 5900 50  0001 C CNN
+F 1 "+5V" H 5350 6350 50  0000 C CNN
+F 2 "" H 5350 6050 50  0001 C CNN
+F 3 "" H 5350 6050 50  0001 C CNN
+	1    5350 6050
+	0    -1   -1   0   
+$EndComp
+$Comp
+L power:GND #PWR0106
+U 1 1 5B93F503
+P 5350 5850
+F 0 "#PWR0106" H 5350 5600 50  0001 C CNN
+F 1 "GND" H 5355 5677 50  0000 C CNN
+F 2 "" H 5350 5850 50  0001 C CNN
+F 3 "" H 5350 5850 50  0001 C CNN
+	1    5350 5850
+	0    1    1    0   
+$EndComp
+$Comp
+L power:GND #PWR0107
+U 1 1 5B93F5DD
+P 5350 6150
+F 0 "#PWR0107" H 5350 5900 50  0001 C CNN
+F 1 "GND" H 5355 5977 50  0000 C CNN
+F 2 "" H 5350 6150 50  0001 C CNN
+F 3 "" H 5350 6150 50  0001 C CNN
+	1    5350 6150
+	0    1    1    0   
+$EndComp
+Wire Wire Line
+	5350 5750 5500 5750
+Wire Wire Line
+	5350 5850 5500 5850
+Wire Wire Line
+	5350 6050 5500 6050
+Wire Wire Line
+	5350 6150 5500 6150
+Wire Wire Line
+	4600 5050 4850 5050
+Wire Wire Line
+	4850 5050 4850 5950
+Wire Wire Line
+	4850 5950 5500 5950
+Wire Wire Line
+	4600 5150 4750 5150
+Wire Wire Line
+	4750 5150 4750 6250
+Wire Wire Line
+	4750 6250 5500 6250
+Text Notes 7450 5050 0    60   ~ 0
+1 = RS485 A\n2 = RS485 B
+Connection ~ 4000 5850
+Wire Wire Line
+	7250 5050 7250 5150
+Wire Wire Line
+	3600 6600 4000 6600
+Wire Wire Line
+	3600 6700 4000 6700
+Wire Wire Line
+	6050 2450 6550 2450
+$Comp
+L Connector_Generic:Conn_02x03_Counter_Clockwise J1
+U 1 1 5BEBD38C
+P 9850 5900
+F 0 "J1" H 9900 6217 50  0000 C CNN
+F 1 "PROG" H 9900 6126 50  0000 C CNN
+F 2 "Pin_Headers:Pin_Header_Straight_2x03_Pitch2.54mm" H 9850 5900 50  0001 C CNN
+F 3 "~" H 9850 5900 50  0001 C CNN
+	1    9850 5900
+	1    0    0    -1  
+$EndComp
+Text GLabel 9650 5800 0    50   Input ~ 0
+MISO
+Text GLabel 9650 5900 0    50   Input ~ 0
+SCK
+Text GLabel 9650 6000 0    50   Input ~ 0
+RST
+Text GLabel 10150 5900 2    50   Input ~ 0
+MOSI
+$Comp
+L power:+5V #PWR0108
+U 1 1 5BEBE75C
+P 10250 5800
+F 0 "#PWR0108" H 10250 5650 50  0001 C CNN
+F 1 "+5V" H 10265 5973 50  0000 C CNN
+F 2 "" H 10250 5800 50  0001 C CNN
+F 3 "" H 10250 5800 50  0001 C CNN
+	1    10250 5800
+	1    0    0    -1  
+$EndComp
+$Comp
+L power:GND #PWR0109
+U 1 1 5BEBE86F
+P 10250 6000
+F 0 "#PWR0109" H 10250 5750 50  0001 C CNN
+F 1 "GND" H 10255 5827 50  0000 C CNN
+F 2 "" H 10250 6000 50  0001 C CNN
+F 3 "" H 10250 6000 50  0001 C CNN
+	1    10250 6000
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	10150 5800 10250 5800
+Wire Wire Line
+	10150 6000 10250 6000
+Text GLabel 3100 3950 0    50   Input ~ 0
+RST
+Wire Wire Line
+	3100 3950 3250 3950
+Connection ~ 3250 3950
+Text GLabel 4600 4550 2    50   Input ~ 0
+MISO
+Text GLabel 4850 4750 2    50   Input ~ 0
+SCK
+Text GLabel 5050 4550 2    50   Input ~ 0
+MOSI
+Wire Wire Line
+	4700 4650 4700 4750
+Wire Wire Line
+	4700 4750 4850 4750
+Connection ~ 4700 4650
+Wire Wire Line
+	4700 4650 5450 4650
+Wire Wire Line
+	4900 4450 4900 4550
+Wire Wire Line
+	4900 4550 5050 4550
+Wire Wire Line
+	5300 5050 5300 5450
+Wire Wire Line
+	5300 5450 4600 5450
+Connection ~ 5300 5050
+$Comp
+L Switch:SW_Push SW1
+U 1 1 5BF329CF
+P 5700 3500
+F 0 "SW1" H 5700 3785 50  0000 C CNN
+F 1 "Button" H 5700 3694 50  0000 C CNN
+F 2 "SMD-BUTTON_4P-5.2X5.2X1.5MM-SKQGAKE010_:SW4-SMD-5.2X5.2X1.5MM" H 5700 3700 50  0001 C CNN
+F 3 "" H 5700 3700 50  0001 C CNN
+	1    5700 3500
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	4600 3950 4800 3950
+Wire Wire Line
+	4800 3950 4800 3700
+Wire Wire Line
+	4800 3700 5500 3700
+Wire Wire Line
+	5500 3700 5500 3500
+$Comp
+L power:GND #PWR01
+U 1 1 5BF4430D
+P 5900 3500
+F 0 "#PWR01" H 5900 3250 50  0001 C CNN
+F 1 "GND" H 5905 3327 50  0000 C CNN
+F 2 "" H 5900 3500 50  0001 C CNN
+F 3 "" H 5900 3500 50  0001 C CNN
+	1    5900 3500
+	1    0    0    -1  
+$EndComp
+$EndSCHEMATC
--- a/kicad/fp-lib-table
+++ b/kicad/fp-lib-table
@ -0,0 +1,5 @@
+(fp_lib_table
+  (lib (name AMS1117-5.0)(type Legacy)(uri ${KIPRJMOD}/libs/AMS1117-5.0.mod)(options "")(descr ""))
+  (lib (name MAX485)(type Legacy)(uri ${KIPRJMOD}/libs/MAX485.mod)(options "")(descr ""))
+  (lib (name SMD-BUTTON_4P-5.2X5.2X1.5MM-SKQGAKE010_)(type Legacy)(uri ${KIPRJMOD}/libs/SMD-BUTTON_4P-5.2X5.2X1.5MM-SKQGAKE010_.mod)(options "")(descr ""))
+)
--- a/kicad/libs/AMS1117-5.0.bck
+++ b/kicad/libs/AMS1117-5.0.bck
@ -0,0 +1,29 @@
+EESchema-LIBRARY Version 2.3
+#encoding utf-8
+#(c) SnapEDA 2016 (snapeda.com)
+#This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License (CC BY-SA) with Design Exception 1.0
+#
+# AMS1117-5.0
+#
+DEF AMS1117-5.0 U 0 40 Y Y 1 L N
+F0 "U" -400 220 50 H V L BNN
+F1 "AMS1117-5.0" -401 -321 50 H V L BNN
+F2 "SOT229P700X180-4N" 0 0 50 H I L BNN
+F3 "Sot223/Pkg 1-Amp 5-Volt Low Drop Out Voltage Regulatator" 0 0 50 H I L BNN
+F4 "Unavailable" 0 0 50 H I L BNN
+F5 "Advanced Monolithic Systems" 0 0 50 H I L BNN
+F6 "None" 0 0 50 H I L BNN
+F7 "None" 0 0 50 H I L BNN
+F8 "AMS1117-5.0" 0 0 50 H I L BNN
+DRAW
+P 2 0 0 10 -400 200 400 200 N
+P 2 0 0 10 400 200 400 -200 N
+P 2 0 0 10 400 -200 -400 -200 N
+P 2 0 0 10 -400 -200 -400 200 N
+X VIN 3 -600 100 200 R 40 40 0 0 I 
+X VOUT 2 600 100 200 L 40 40 0 0 O 
+X ADJ/GND 1 600 -100 200 L 40 40 0 0 W 
+ENDDRAW
+ENDDEF
+#
+# End Library
--- a/kicad/libs/AMS1117-5.0.dcm
+++ b/kicad/libs/AMS1117-5.0.dcm
@ -0,0 +1,3 @@
+EESchema-DOCLIB  Version 2.0
+#
+#End Doc Library
--- a/kicad/libs/AMS1117-5.0.lib
+++ b/kicad/libs/AMS1117-5.0.lib
@ -0,0 +1,24 @@
+EESchema-LIBRARY Version 2.4
+#encoding utf-8
+#
+# AMS1117-5.0
+#
+DEF AMS1117-5.0 U 0 40 Y Y 1 L N
+F0 "U" -400 220 50 H V L BNN
+F1 "AMS1117-5.0" -401 -321 50 H V L BNN
+F2 "SOT229P700X180-4N" 0 0 50 H I L BNN
+F3 "Sot223/Pkg 1-Amp 5-Volt Low Drop Out Voltage Regulatator" 0 0 50 H I L BNN
+F4 "Unavailable" 0 0 50 H I L BNN
+F5 "Advanced Monolithic Systems" 0 0 50 H I L BNN
+F6 "None" 0 0 50 H I L BNN
+F7 "None" 0 0 50 H I L BNN
+F8 "AMS1117-5.0" 0 0 50 H I L BNN
+DRAW
+S -400 200 400 -200 0 1 0 f
+X ADJ/GND 1 600 -100 200 L 40 40 0 0 W
+X VOUT 2 600 100 200 L 40 40 0 0 O
+X VIN 3 -600 100 200 R 40 40 0 0 I
+ENDDRAW
+ENDDEF
+#
+#End Library
--- a/kicad/libs/AMS1117-5.0.mod
+++ b/kicad/libs/AMS1117-5.0.mod
@ -0,0 +1,73 @@
+PCBNEW-LibModule-V1  
+# encoding utf-8
+Units mm
+$INDEX
+SOT229P700X180-4N
+$EndINDEX
+$MODULE SOT229P700X180-4N
+Po 0 0 0 15 00000000 00000000 ~~
+Li SOT229P700X180-4N
+Cd 
+Sc 00000000
+At SMD
+Op 0 0 0
+.SolderMask 0
+.SolderPaste 0
+T0 -1.15242 -5.14581 1.00211 1.00211 0 0.05 N V 21 "SOT229P700X180-4N"
+T1 -0.516467 5.54073 1.00285 1.00285 0 0.05 N V 21 "VAL**"
+DS -3.36 1.86 -3.36 -1.86 0.127 24
+DS -3.36 -1.86 3.36 -1.86 0.127 24
+DS 3.36 -1.86 3.36 1.86 0.127 24
+DS 3.36 1.86 -3.36 1.86 0.127 24
+DS -3.36 1.86 -3.36 -1.86 0.127 21
+DS 3.36 1.86 3.36 -1.86 0.127 21
+DS -3.36 1.86 -3.1 1.86 0.127 21
+DS 3.11 1.86 3.36 1.86 0.127 21
+DS 3.36 -1.86 1.87 -1.86 0.127 21
+DS -1.76 -1.86 -3.36 -1.86 0.127 21
+DC -2.29 4.373 -2.19 4.373 0.2 21
+DS -3.61 -2.11 -3.61 2.11 0.05 26
+DS -3.61 2.11 -3.01 2.11 0.05 26
+DS -3.01 2.11 -3.01 4.25 0.05 26
+DS -3.01 4.25 3.01 4.25 0.05 26
+DS 3.01 4.25 3.01 2.11 0.05 26
+DS 3.01 2.11 3.61 2.11 0.05 26
+DS 3.61 2.11 3.61 -2.11 0.05 26
+DS 3.61 -2.11 1.87 -2.11 0.05 26
+DS 1.87 -2.11 1.87 -4.25 0.05 26
+DS 1.87 -4.25 -1.87 -4.25 0.05 26
+DS -1.87 -4.25 -1.87 -2.11 0.05 26
+DS -1.87 -2.11 -3.61 -2.11 0.05 26
+$PAD
+Sh "1" R 0.93 1.31 0 0 0
+At SMD N 00888000
+.SolderMask 0
+.SolderPaste 0
+Ne 0 ""
+Po -2.29 3.345
+$EndPAD
+$PAD
+Sh "2" R 0.93 1.31 0 0 0
+At SMD N 00888000
+.SolderMask 0
+.SolderPaste 0
+Ne 0 ""
+Po 0 3.345
+$EndPAD
+$PAD
+Sh "3" R 0.93 1.31 0 0 0
+At SMD N 00888000
+.SolderMask 0
+.SolderPaste 0
+Ne 0 ""
+Po 2.29 3.345
+$EndPAD
+$PAD
+Sh "4" R 3.24 1.31 0 0 0
+At SMD N 00888000
+.SolderMask 0
+.SolderPaste 0
+Ne 0 ""
+Po 0 -3.345
+$EndPAD
+$EndMODULE SOT229P700X180-4N
--- a/kicad/libs/MAX485.bck
+++ b/kicad/libs/MAX485.bck
@ -0,0 +1,3 @@
+EESchema-DOCLIB  Version 2.0
+#
+#End Doc Library
--- a/kicad/libs/MAX485.dcm
+++ b/kicad/libs/MAX485.dcm
@ -0,0 +1,3 @@
+EESchema-DOCLIB  Version 2.0
+#
+#End Doc Library
--- a/kicad/libs/MAX485.lib
+++ b/kicad/libs/MAX485.lib
@ -0,0 +1,32 @@
+EESchema-LIBRARY Version 2.4
+#encoding utf-8
+#
+# MAX485
+#
+DEF MAX485 U 0 40 Y Y 1 L N
+F0 "U" -401 301 50 H V L BNN
+F1 "MAX485" -401 -301 50 H V L BNN
+F2 "" 0 0 50 H I C CNN
+F3 "Maxim Integrated" 0 0 50 H I L BNN
+F4 "None" 0 0 50 H I L BNN
+F5 "Unavailable" 0 0 50 H I L BNN
+F6 "None" 0 0 50 H I L BNN
+F7 "MAX485" 0 0 50 H I L BNN
+$FPLIST
+ DIL08
+ SO08
+$ENDFPLIST
+DRAW
+S -400 300 400 -200 0 1 0 f
+X RO 1 -600 200 200 R 40 40 0 0 B
+X RE 2 -600 100 200 R 40 40 0 0 B I
+X DE 3 -600 0 200 R 40 40 0 0 B
+X DI 4 -600 -100 200 R 40 40 0 0 B
+X GND 5 600 -100 200 L 40 40 0 0 W
+X A 6 600 0 200 L 40 40 0 0 B
+X B 7 600 100 200 L 40 40 0 0 B
+X VCC 8 600 200 200 L 40 40 0 0 W
+ENDDRAW
+ENDDEF
+#
+#End Library
--- a/kicad/libs/MAX485.mod
+++ b/kicad/libs/MAX485.mod
@ -0,0 +1,214 @@
+PCBNEW-LibModule-V1  
+# encoding utf-8
+Units mm
+$INDEX
+DIL08
+SO08
+$EndINDEX
+$MODULE DIL08
+Po 0 0 0 15 00000000 00000000 ~~
+Li DIL08
+Cd <b>Dual In Line</b>
+Sc 00000000
+At STD
+Op 0 0 0
+.SolderMask 0
+.SolderPaste 0
+T0 -6.35758 1.27152 1.00119 1.00119 900 0.05 N V 21 "DIL08"
+T1 5.00698e-06 -2.00279e-06 1.00244 1.00244 0 0.05 N V 21 "VAL**"
+DS 5.08 -5.08 -5.08 -5.08 0.1524 21
+DS -5.08 5.08 5.08 5.08 0.1524 21
+DS 5.08 -5.08 5.08 -2.54 0.1524 21
+DS -5.08 -5.08 -5.08 -2.54 0.1524 21
+DS -5.08 5.08 -5.08 2.54 0.1524 21
+DA -5.08 0 -5.08 -1.016 1800 0.1524 21
+DS -5.08 -2.54 5.08 -2.54 0.1524 21
+DS -5.08 -2.54 -5.08 -1.016 0.2032 21
+DS 5.08 -2.54 5.08 2.54 0.1524 21
+DS -5.08 2.54 5.08 2.54 0.1524 21
+DS -5.08 2.54 -5.08 1.016 0.1524 21
+DS 5.08 2.54 5.08 5.08 0.1524 21
+$PAD
+Sh "1" C 1.6002 1.6002 0 0 0
+Dr 0.8128 0 0
+At STD N 00C0FFFF
+.SolderMask 0
+Ne 0 ""
+Po -3.81 3.81
+$EndPAD
+$PAD
+Sh "2" C 1.6002 1.6002 0 0 0
+Dr 0.8128 0 0
+At STD N 00C0FFFF
+.SolderMask 0
+Ne 0 ""
+Po -1.27 3.81
+$EndPAD
+$PAD
+Sh "3" C 1.6002 1.6002 0 0 0
+Dr 0.8128 0 0
+At STD N 00C0FFFF
+.SolderMask 0
+Ne 0 ""
+Po 1.27 3.81
+$EndPAD
+$PAD
+Sh "4" C 1.6002 1.6002 0 0 0
+Dr 0.8128 0 0
+At STD N 00C0FFFF
+.SolderMask 0
+Ne 0 ""
+Po 3.81 3.81
+$EndPAD
+$PAD
+Sh "5" C 1.6002 1.6002 0 0 0
+Dr 0.8128 0 0
+At STD N 00C0FFFF
+.SolderMask 0
+Ne 0 ""
+Po 3.81 -3.81
+$EndPAD
+$PAD
+Sh "6" C 1.6002 1.6002 0 0 0
+Dr 0.8128 0 0
+At STD N 00C0FFFF
+.SolderMask 0
+Ne 0 ""
+Po 1.27 -3.81
+$EndPAD
+$PAD
+Sh "7" C 1.6002 1.6002 0 0 0
+Dr 0.8128 0 0
+At STD N 00C0FFFF
+.SolderMask 0
+Ne 0 ""
+Po -1.27 -3.81
+$EndPAD
+$PAD
+Sh "8" C 1.6002 1.6002 0 0 0
+Dr 0.8128 0 0
+At STD N 00C0FFFF
+.SolderMask 0
+Ne 0 ""
+Po -3.81 -3.81
+$EndPAD
+$EndMODULE DIL08
+$MODULE SO08
+Po 0 0 0 15 00000000 00000000 ~~
+Li SO08
+Cd <b>Small Outline Package</b> Fits JEDEC packages (narrow SOIC-8)
+Sc 00000000
+At SMD
+Op 0 0 0
+.SolderMask 0
+.SolderPaste 0
+T0 -0.45744 -0.203305 0.320166 0.320166 0 0.05 N V 21 "SO08"
+T1 -0.254561 0.432759 0.32071 0.32071 0 0.05 N V 21 "VAL**"
+DS -2.362 1.803 2.362 1.803 0.1524 24
+DS 2.362 -1.803 -2.362 -1.803 0.1524 24
+DC -1.8034 0.9906 -1.6598 0.9906 0.2032 21
+DP 0 0 0 0 4 0 24
+Dl -2.08797 1.8542
+Dl -1.7272 1.8542
+Dl -1.7272 2.87731
+Dl -2.08797 2.87731
+DP 0 0 0 0 4 0 24
+Dl -0.813844 1.8542
+Dl -0.4572 1.8542
+Dl -0.4572 2.87389
+Dl -0.813844 2.87389
+DP 0 0 0 0 4 0 24
+Dl 0.458097 1.8542
+Dl 0.8128 1.8542
+Dl 0.8128 2.87584
+Dl 0.458097 2.87584
+DP 0 0 0 0 4 0 24
+Dl 1.72892 1.8542
+Dl 2.0828 1.8542
+Dl 2.0828 2.87306
+Dl 1.72892 2.87306
+DP 0 0 0 0 4 0 24
+Dl -2.08675 -2.8702
+Dl -1.7272 -2.8702
+Dl -1.7272 -1.85772
+Dl -2.08675 -1.85772
+DP 0 0 0 0 4 0 24
+Dl -0.813701 -2.8702
+Dl -0.4572 -2.8702
+Dl -0.4572 -1.85626
+Dl -0.813701 -1.85626
+DP 0 0 0 0 4 0 24
+Dl 0.458322 -2.8702
+Dl 0.8128 -2.8702
+Dl 0.8128 -1.85875
+Dl 0.458322 -1.85875
+DP 0 0 0 0 4 0 24
+Dl 1.73057 -2.8702
+Dl 2.0828 -2.8702
+Dl 2.0828 -1.85782
+Dl 1.73057 -1.85782
+$PAD
+Sh "1" R 0.6096 2.2098 0 0 0
+At SMD N 00888000
+.SolderMask 0
+.SolderPaste 0
+Ne 0 ""
+Po -1.905 2.6162
+$EndPAD
+$PAD
+Sh "2" R 0.6096 2.2098 0 0 0
+At SMD N 00888000
+.SolderMask 0
+.SolderPaste 0
+Ne 0 ""
+Po -0.635 2.6162
+$EndPAD
+$PAD
+Sh "3" R 0.6096 2.2098 0 0 0
+At SMD N 00888000
+.SolderMask 0
+.SolderPaste 0
+Ne 0 ""
+Po 0.635 2.6162
+$EndPAD
+$PAD
+Sh "4" R 0.6096 2.2098 0 0 0
+At SMD N 00888000
+.SolderMask 0
+.SolderPaste 0
+Ne 0 ""
+Po 1.905 2.6162
+$EndPAD
+$PAD
+Sh "5" R 0.6096 2.2098 0 0 0
+At SMD N 00888000
+.SolderMask 0
+.SolderPaste 0
+Ne 0 ""
+Po 1.905 -2.6162
+$EndPAD
+$PAD
+Sh "6" R 0.6096 2.2098 0 0 0
+At SMD N 00888000
+.SolderMask 0
+.SolderPaste 0
+Ne 0 ""
+Po 0.635 -2.6162
+$EndPAD
+$PAD
+Sh "7" R 0.6096 2.2098 0 0 0
+At SMD N 00888000
+.SolderMask 0
+.SolderPaste 0
+Ne 0 ""
+Po -0.635 -2.6162
+$EndPAD
+$PAD
+Sh "8" R 0.6096 2.2098 0 0 0
+At SMD N 00888000
+.SolderMask 0
+.SolderPaste 0
+Ne 0 ""
+Po -1.905 -2.6162
+$EndPAD
+$EndMODULE SO08
--- a/kicad/libs/PCA9685-TSSOP.bck
+++ b/kicad/libs/PCA9685-TSSOP.bck
@ -0,0 +1,43 @@
+EESchema-LIBRARY Version 2.2  Date: 04/05/2014-04:12:59
+#
+# PCA9685-TSSOP
+#
+DEF PCA9685-TSSOP U 0 40 Y Y 1 0 N
+F0 "U" 0 -100 50 H V C C
+F1 "PCA9685-TSSOP" 0 100 50 H V C C
+F2 "MODULE" 0 0 50 H I C C
+F3 "DOCUMENTATION" 0 0 50 H I C C
+DRAW
+S -450 -850 450 850 1 0 0 N
+X A0 1 -750 650 300 R 50 50 1 1 I
+X A1 2 -750 550 300 R 50 50 1 1 I
+X A2 3 -750 450 300 R 50 50 1 1 I
+X A3 4 -750 350 300 R 50 50 1 1 I
+X A4 5 -750 250 300 R 50 50 1 1 I
+X LED0 6 -750 150 300 R 50 50 1 1 O
+X LED1 7 -750 50 300 R 50 50 1 1 O
+X LED2 8 -750 -50 300 R 50 50 1 1 O
+X LED3 9 -750 -150 300 R 50 50 1 1 O
+X LED4 10 -750 -250 300 R 50 50 1 1 O
+X LED5 11 -750 -350 300 R 50 50 1 1 O
+X LED6 12 -750 -450 300 R 50 50 1 1 O
+X LED7 13 -750 -550 300 R 50 50 1 1 O
+X GND 14 -750 -650 300 R 50 50 1 1 I
+X LED8 15 750 -650 300 L 50 50 1 1 O
+X LED9 16 750 -550 300 L 50 50 1 1 O
+X LED10 17 750 -450 300 L 50 50 1 1 O
+X LED11 18 750 -350 300 L 50 50 1 1 O
+X LED12 19 750 -250 300 L 50 50 1 1 O
+X LED13 20 750 -150 300 L 50 50 1 1 O
+X LED14 21 750 -50 300 L 50 50 1 1 O
+X LED15 22 750 50 300 L 50 50 1 1 O
+X OE 23 750 150 300 L 50 50 1 1 I
+X A5 24 750 250 300 L 50 50 1 1 I
+X EXTCLK 25 750 350 300 L 50 50 1 1 I
+X SCL 26 750 450 300 L 50 50 1 1 I
+X SDA 27 750 550 300 L 50 50 1 1 B
+X VCC 28 750 650 300 L 50 50 1 1 I
+ENDDRAW
+ENDDEF
+#
+#End Library
--- a/kicad/libs/PCA9685-TSSOP.dcm
+++ b/kicad/libs/PCA9685-TSSOP.dcm
@ -0,0 +1,3 @@
+EESchema-DOCLIB  Version 2.0
+#
+#End Doc Library
--- a/kicad/libs/PCA9685-TSSOP.lib
+++ b/kicad/libs/PCA9685-TSSOP.lib
@ -0,0 +1,44 @@
+EESchema-LIBRARY Version 2.4
+#encoding utf-8
+#
+# PCA9685-TSSOP
+#
+DEF PCA9685-TSSOP U 0 40 Y Y 1 F N
+F0 "U" 0 -100 50 H V C CNN
+F1 "PCA9685-TSSOP" 0 100 50 H V C CNN
+F2 "MODULE" 0 0 50 H I C CNN
+F3 "DOCUMENTATION" 0 0 50 H I C CNN
+DRAW
+S -450 -850 450 850 1 0 0 f
+X A0 1 -750 650 300 R 50 50 1 1 I
+X LED4 10 -750 -250 300 R 50 50 1 1 O
+X LED5 11 -750 -350 300 R 50 50 1 1 O
+X LED6 12 -750 -450 300 R 50 50 1 1 O
+X LED7 13 -750 -550 300 R 50 50 1 1 O
+X GND 14 -750 -650 300 R 50 50 1 1 I
+X LED8 15 750 -650 300 L 50 50 1 1 O
+X LED9 16 750 -550 300 L 50 50 1 1 O
+X LED10 17 750 -450 300 L 50 50 1 1 O
+X LED11 18 750 -350 300 L 50 50 1 1 O
+X LED12 19 750 -250 300 L 50 50 1 1 O
+X A1 2 -750 550 300 R 50 50 1 1 I
+X LED13 20 750 -150 300 L 50 50 1 1 O
+X LED14 21 750 -50 300 L 50 50 1 1 O
+X LED15 22 750 50 300 L 50 50 1 1 O
+X OE 23 750 150 300 L 50 50 1 1 I
+X A5 24 750 250 300 L 50 50 1 1 I
+X EXTCLK 25 750 350 300 L 50 50 1 1 I
+X SCL 26 750 450 300 L 50 50 1 1 I
+X SDA 27 750 550 300 L 50 50 1 1 B
+X VCC 28 750 650 300 L 50 50 1 1 I
+X A2 3 -750 450 300 R 50 50 1 1 I
+X A3 4 -750 350 300 R 50 50 1 1 I
+X A4 5 -750 250 300 R 50 50 1 1 I
+X LED0 6 -750 150 300 R 50 50 1 1 O
+X LED1 7 -750 50 300 R 50 50 1 1 O
+X LED2 8 -750 -50 300 R 50 50 1 1 O
+X LED3 9 -750 -150 300 R 50 50 1 1 O
+ENDDRAW
+ENDDEF
+#
+#End Library
--- a/kicad/libs/SMD-BUTTON_4P-5.2X5.2X1.5MM-SKQGAKE010_.lib
+++ b/kicad/libs/SMD-BUTTON_4P-5.2X5.2X1.5MM-SKQGAKE010_.lib
@ -0,0 +1,47 @@
+EESchema-LIBRARY Version 2.3
+#encoding utf-8
+#(c) SnapEDA 2016 (snapeda.com)
+#This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License (CC BY-SA) with Design Exception 1.0
+#
+# SMD-BUTTON(4P-5.2X5.2X1.5MM-SKQGAKE010)
+#
+DEF SMD-BUTTON(4P-5.2X5.2X1.5MM-SKQGAKE010) SW 0 40 Y Y 1 L N
+F0 "SW" -201 201 50 H V L BNN
+F1 "SMD-BUTTON(4P-5.2X5.2X1.5MM-SKQGAKE010)" -200 -250 50 H V L BNN
+F2 "SW4-SMD-5.2X5.2X1.5MM" 0 0 50 H I L BNN
+F3 "None" 0 0 50 H I L BNN
+F4 "SKQGAKE010" 0 0 50 H I L BNN
+F5 "None" 0 0 50 H I L BNN
+F6 "Unavailable" 0 0 50 H I L BNN
+F7 "ALPS" 0 0 50 H I L BNN
+F8 "Switch Tactile N.O. SPST Button Gull Wing 0.05A 12VDC 3.43N SMD T/R" 0 0 50 H I L BNN
+DRAW
+P 2 0 0 10 -200 200 200 200 N
+P 2 0 0 10 200 200 200 100 N
+P 2 0 0 10 200 100 200 -100 N
+P 2 0 0 10 200 -100 200 -200 N
+P 2 0 0 10 200 -200 -200 -200 N
+P 2 0 0 10 -200 -200 -200 -100 N
+P 2 0 0 10 -200 -100 -200 100 N
+P 2 0 0 10 -200 100 -200 200 N
+P 2 0 0 6 -200 100 0 100 N
+P 2 0 0 6 0 100 200 100 N
+P 2 0 0 6 0 100 0 50 N
+P 2 0 0 6 0 50 -50 -30 N
+P 2 0 0 6 0 -50 0 -100 N
+P 2 0 0 6 0 -100 200 -100 N
+P 2 0 0 6 0 -100 -200 -100 N
+P 2 0 0 6 -250 100 -200 100 N
+P 2 0 0 6 -250 -100 -200 -100 N
+P 2 0 0 6 250 -100 200 -100 N
+P 2 0 0 6 250 100 200 100 N
+C -50 -30 6 0 0 0 N
+C 0 -50 6 0 0 0 N
+X A0 1 -350 100 100 R 40 40 0 0 B 
+X A1 2 350 100 100 L 40 40 0 0 B 
+X B0 3 -350 -100 100 R 40 40 0 0 B 
+X B1 4 350 -100 100 L 40 40 0 0 B 
+ENDDRAW
+ENDDEF
+#
+# End Library
--- a/kicad/libs/SMD-BUTTON_4P-5.2X5.2X1.5MM-SKQGAKE010_.mod
+++ b/kicad/libs/SMD-BUTTON_4P-5.2X5.2X1.5MM-SKQGAKE010_.mod
@ -0,0 +1,67 @@
+PCBNEW-LibModule-V1  
+# encoding utf-8
+Units mm
+$INDEX
+SW4-SMD-5.2X5.2X1.5MM
+$EndINDEX
+$MODULE SW4-SMD-5.2X5.2X1.5MM
+Po 0 0 0 15 00000000 00000000 ~~
+Li SW4-SMD-5.2X5.2X1.5MM
+Cd 
+Sc 00000000
+At SMD
+Op 0 0 0
+.SolderMask 0
+.SolderPaste 0
+T0 -0.523383 -3.25313 0.701862 0.701862 0 0.05 N V 21 "SW4-SMD-5.2X5.2X1.5MM"
+T1 -0.112861 -0.218191 0.501589 0.501589 0 0.05 N V 21 "VAL**"
+DS 2.6 1.46863 1.46863 2.6 0.127 24
+DS 1.5 2.6 -1.1 2.6 0.127 21
+DS -1.1 2.6 -1.45982 2.6 0.127 21
+DS -1.45982 2.6 -2.6 1.45982 0.127 24
+DS -2.6 -1.39584 -1.39584 -2.6 0.127 24
+DS -1.4 -2.6 1.5 -2.6 0.127 21
+DS 1.43381 -2.6 2.6 -1.43381 0.127 24
+DP 0 0 0 0 4 0 26
+Dl -2.50464 -2.6
+Dl 2.6 -2.6
+Dl 2.6 2.60484
+Dl -2.50464 2.60484
+DS -1.4 -2.6 -2.4 -1.6 0.127 21
+DS 1.5 -2.6 2.4 -1.7 0.127 21
+DS 1.5 2.6 2.4 1.7 0.127 21
+DS -1.45982 2.6 -1.5 2.6 0.127 21
+DS -1.5 2.6 -2.4 1.7 0.127 21
+$PAD
+Sh "1" R 1 0.7 0 0 0
+At SMD N 00888000
+.SolderMask 0
+.SolderPaste 0
+Ne 0 ""
+Po -3 -1.85
+$EndPAD
+$PAD
+Sh "2" R 1 0.7 0 0 0
+At SMD N 00888000
+.SolderMask 0
+.SolderPaste 0
+Ne 0 ""
+Po 3 -1.85
+$EndPAD
+$PAD
+Sh "3" R 1 0.7 0 0 0
+At SMD N 00888000
+.SolderMask 0
+.SolderPaste 0
+Ne 0 ""
+Po -3 1.85
+$EndPAD
+$PAD
+Sh "4" R 1 0.7 0 0 0
+At SMD N 00888000
+.SolderMask 0
+.SolderPaste 0
+Ne 0 ""
+Po 3 1.85
+$EndPAD
+$EndMODULE SW4-SMD-5.2X5.2X1.5MM
--- a/kicad/sym-lib-table
+++ b/kicad/sym-lib-table
@ -0,0 +1,6 @@
+(sym_lib_table
+  (lib (name PCA9685-TSSOP)(type Legacy)(uri ${KIPRJMOD}/libs/PCA9685-TSSOP.lib)(options "")(descr ""))
+  (lib (name MAX485)(type Legacy)(uri ${KIPRJMOD}/libs/MAX485.lib)(options "")(descr ""))
+  (lib (name AMS1117-5.0)(type Legacy)(uri ${KIPRJMOD}/libs/AMS1117-5.0.lib)(options "")(descr ""))
+  (lib (name SMD-BUTTON_4P-5.2X5.2X1.5MM-SKQGAKE010_)(type Legacy)(uri ${KIPRJMOD}/libs/SMD-BUTTON_4P-5.2X5.2X1.5MM-SKQGAKE010_.lib)(options "")(descr ""))
+)
--- a/module/build.bat
+++ b/module/build.bat
@ -0,0 +1 @@
+@pio run
--- a/module/fuses.bat
+++ b/module/fuses.bat
@ -0,0 +1,3 @@
+REM Internal 8 Mhz oscillator, no clock division
+REM   http://www.engbedded.com/fusecalc/
+@avrdude -c usbtiny -p t2313 -e -U lfuse:w:0xe4:m -U hfuse:w:0xdf:m -U efuse:w:0xff:m
--- a/module/platformio.ini
+++ b/module/platformio.ini
@ -0,0 +1,19 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; http://docs.platformio.org/page/projectconf.html
+
+[platformio]
+env_default = board
+
+[env:board]
+platform = atmelavr
+board = attiny4313
+board_build.f_cpu = 8000000L
+upload_speed = 115200
+upload_protocol = usbtiny
--- a/module/src/display.c
+++ b/module/src/display.c
@ -0,0 +1,126 @@
+/*
+ * Stairs lighting
+ * Copyright 2017 (c) Mark van Renswoude
+ *
+ * https://git.x2software.net/pub/Stairs
+*/
+#include "display.h"
+#include <stdint.h>
+#include <stdbool.h>
+#include <avr/pgmspace.h>
+#include "lib/VeryTinySSD1306.h"
+#include "lib/VeryTinyBigChars.h"
+#include "lib/TinyMillis.h"
+#include "global.h"
+
+
+#define CharSpacing 4
+#define CharOuterWidth (SSD1306_CharWidth_32px + CharSpacing)
+#define SingleCharCenteredX ((SSD1306_DisplayWidth - SSD1306_CharWidth_32px) / 2)
+#define WaitAnimationInterval 250
+
+
+#define WaitAnimationMaxStep 3
+const uint16_t WaitAnimation [] PROGMEM = {
+  0b0000000000000100, // Left
+  0b0000000010000000, // Middle
+  0b0001000000000000, // Right
+  0b0000000010000000  // Middle
+};
+/*
+#define WaitAnimationMaxStep 7
+const uint16_t WaitAnimation [] PROGMEM = {
+  0b0000000001000000, // Top
+  0b0000100000000000, // Top-right
+  0b0001000000000000, // Right
+  0b0010000000000000, // Bottom-right
+  0b0000000100000000, // Bottom
+  0b0000000000001000, // Bottom-left
+  0b0000000000000100, // Left
+  0b0000000000000010  // Top-left
+};
+*/
+
+
+bool isWait = false;
+uint16_t lastWait = 0;
+uint8_t waitAnimationStep = 0;
+
+
+
+inline void display_drawNumber(uint8_t* x, uint8_t value)
+{
+  if (value > 9)
+  {
+    ssd1306_drawdigit_32px(*x, value / 10);
+    *x += CharOuterWidth;
+    ssd1306_drawdigit_32px(*x, value % 10);
+  }
+  else
+    ssd1306_drawdigit_32px(*x, value);
+
+  *x += CharOuterWidth;
+}
+
+
+void display_init(void)
+{
+  ssd1306_begin_default();
+  ssd1306_clear();
+  ssd1306_on();
+  ssd1306_switchRenderFrame();
+}
+
+
+void display_drawIndex(void)
+{
+  ssd1306_clear();
+
+  uint8_t moduleIndex = global_getModuleIndex();
+
+  if (moduleIndex == ModuleIndexUndefined)
+  {
+    ssd1306_drawminus_32px(SingleCharCenteredX);
+  }
+  else
+  {
+    uint8_t firstStep = (moduleIndex * 2) + 1;
+    uint8_t totalWidth = 3 * CharOuterWidth;
+
+    if (firstStep == 9)
+      totalWidth += CharOuterWidth;
+    else if (firstStep > 9)
+      totalWidth += 2 * CharOuterWidth;
+
+
+    uint8_t currentX = (SSD1306_DisplayWidth - totalWidth) / 2;
+    display_drawNumber(&currentX, firstStep);
+
+    ssd1306_drawminus_32px(currentX);
+    currentX += CharOuterWidth;
+
+    display_drawNumber(&currentX, firstStep + 1);
+  }
+
+  ssd1306_switchFrame();
+}
+
+
+void display_drawWait(void)
+{
+  uint16_t currentTime = millis();
+
+  if (isWait && currentTime - lastWait < WaitAnimationInterval)
+    return;
+
+  ssd1306_clear();
+  ssd1306_drawchar_32px(SingleCharCenteredX, pgm_read_word(&WaitAnimation[waitAnimationStep]));
+  ssd1306_switchFrame();
+
+  waitAnimationStep++;
+  if (waitAnimationStep > WaitAnimationMaxStep)
+    waitAnimationStep = 0;
+
+  isWait = true;
+  lastWait = currentTime;
+}
--- a/module/src/display.h
+++ b/module/src/display.h
@ -0,0 +1,14 @@
+/*
+ * Stairs lighting
+ * Copyright 2017 (c) Mark van Renswoude
+ *
+ * https://git.x2software.net/pub/Stairs
+*/
+#ifndef __display
+#define __display
+
+void display_init(void);
+void display_drawIndex(void);
+void display_drawWait(void);
+
+#endif
--- a/module/src/global.c
+++ b/module/src/global.c
@ -0,0 +1,59 @@
+/*
+ * Stairs lighting
+ * Copyright 2017 (c) Mark van Renswoude
+ *
+ * https://git.x2software.net/pub/Stairs
+*/
+#include "global.h"
+#include <avr/eeprom.h>
+
+
+// EEPROM
+// First byte is 0xAA to recognize uninitialised EEPROM
+#define EEPROMHeader 0xAA
+
+// Second byte is a version indicator
+#define EEPROMCurrentVersion 1
+
+// Version 1 fields
+// index: 2
+uint8_t moduleIndex = ModuleIndexUndefined;
+
+
+void global_init(void)
+{
+  uint8_t address = 0;
+  if (eeprom_read_byte(&address) != EEPROMHeader)
+  {
+    eeprom_write_byte(&address, EEPROMHeader); address++;
+    eeprom_write_byte(&address, EEPROMCurrentVersion); address++;
+    eeprom_write_byte(&address, moduleIndex); address++;
+  }
+  else
+  {
+    address++;
+    uint8_t version = eeprom_read_byte(&address); address++;
+    if (version >= 1)
+    {
+      moduleIndex = eeprom_read_byte(&address); address++;
+    }
+  }
+}
+
+
+uint8_t global_getModuleIndex(void)
+{
+  return moduleIndex;
+}
+
+
+void global_setModuleIndex(uint8_t index)
+{
+  if (index == moduleIndex)
+    return;
+
+  moduleIndex = index;
+
+  uint8_t address = 2;
+  eeprom_write_byte(&address, moduleIndex);
+}
--- a/module/src/global.h
+++ b/module/src/global.h
@ -0,0 +1,19 @@
+/*
+ * Stairs lighting
+ * Copyright 2017 (c) Mark van Renswoude
+ *
+ * https://git.x2software.net/pub/Stairs
+*/
+#ifndef __global
+#define __global
+
+#include <stdint.h>
+
+#define ModuleIndexUndefined 0xff
+
+void global_init(void);
+
+uint8_t global_getModuleIndex(void);
+void global_setModuleIndex(uint8_t index);
+
+#endif
--- a/module/src/lib/TinyMillis.c
+++ b/module/src/lib/TinyMillis.c
@ -0,0 +1,46 @@
+/*
+ * Stairs lighting
+ * Copyright 2017 (c) Mark van Renswoude
+ *
+ * https://git.x2software.net/pub/Stairs
+*/
+#include "TinyMillis.h"
+#include <avr/io.h>
+#include <util/atomic.h>
+#include <avr/interrupt.h>
+
+
+volatile uint16_t tickCount;
+
+
+ISR(TIMER1_COMPA_vect)
+{
+  tickCount++;
+}
+
+
+void millis_init(void)
+{
+  uint32_t overflow;
+
+  overflow = ((F_CPU / 1000) / 8);
+
+  TCCR1B |= (1 << WGM12) | (1 << CS11);
+  OCR1AH = (overflow >> 8);
+  OCR1AL = overflow;
+
+  TIMSK |= (1 << OCIE1A);
+}
+
+
+uint16_t millis(void)
+{
+  uint16_t value;
+
+  ATOMIC_BLOCK(ATOMIC_FORCEON)
+  {
+    value = tickCount;
+  }
+
+  return value;
+}
--- a/module/src/lib/TinyMillis.h
+++ b/module/src/lib/TinyMillis.h
@ -0,0 +1,21 @@
+/*
+ * Stairs lighting
+ * Copyright 2017 (c) Mark van Renswoude
+ *
+ * https://git.x2software.net/pub/Stairs
+ *
+ * Counts the elapsed milliseconds similar to Arduino's millis(void).
+ * Accuracy is not assumed to be important, and assumes no long-running
+ * checks are done so it can get away with 16 bits (65 seconds max).
+*/
+#ifndef __TinyMillis
+#define __TinyMillis
+
+#include <stdint.h>
+
+// call sei(void) afterwards
+void millis_init(void);
+
+uint16_t millis(void);
+
+#endif
--- a/module/src/lib/TinyRS485.c
+++ b/module/src/lib/TinyRS485.c
@ -0,0 +1,262 @@
+/*
+ * Stairs lighting
+ * Copyright 2017 (c) Mark van Renswoude
+ *
+ * https://git.x2software.net/pub/Stairs
+ *
+ * Straight up port of Nick Gammon's non-blocking
+ * RS485 library to C and removing the Arduino
+ * framework dependency.
+ *
+ * Source:
+ *    https://www.gammon.com.au/forum/?id=11428
+ *    Devised and written by Nick Gammon.
+ *    Date: 4 December 2012
+ *    Version: 1.0
+*/
+#include "TinyRS485.h"
+#include "TinyMillis.h"
+#include <stdlib.h>
+
+
+ReadCallback doRead;
+AvailableCallback doAvailable;
+WriteCallback doWrite;
+
+
+// where we save incoming stuff
+uint8_t* data;
+
+// how much data is in the buffer
+uint8_t bufferSize;
+
+// this is true once we have valid data in buf
+bool available;
+
+// an STX (start of text) signals a packet start
+bool haveSTX;
+
+// count of errors
+uint16_t errorCount;
+
+// variables below are set when we get an STX
+bool haveETX;
+uint8_t inputPos;
+uint8_t currentByte;
+bool firstNibble;
+uint16_t startTime;
+
+
+// helper private functions
+uint8_t crc8 (uint8_t* addr, uint8_t len)
+{
+  uint8_t crc = 0;
+  while (len--)
+  {
+    uint8_t inbyte = *addr++;
+    for (uint8_t i = 8; i; i--)
+    {
+      uint8_t mix = (crc ^ inbyte) & 0x01;
+      crc >>= 1;
+      if (mix)
+        crc ^= 0x8C;
+
+      inbyte >>= 1;
+    }
+  }
+  return crc;
+}
+
+
+// send a byte complemented, repeated
+// only values sent would be (in hex):
+//   0F, 1E, 2D, 3C, 4B, 5A, 69, 78, 87, 96, A5, B4, C3, D2, E1, F0
+void sendComplemented(uint8_t what)
+{
+  uint8_t c;
+
+  // first nibble
+  c = what >> 4;
+  doWrite((c << 4) | (c ^ 0x0F));
+
+  // second nibble
+  c = what & 0x0F;
+  doWrite((c << 4) | (c ^ 0x0F));
+}
+
+
+
+void rs485_begin(ReadCallback readCallback,
+                 AvailableCallback availableCallback,
+                 WriteCallback writeCallback,
+                 uint8_t bufferSize)
+{
+  doRead = readCallback;
+  doAvailable = availableCallback;
+  doWrite = writeCallback;
+  data = (uint8_t*)malloc(bufferSize);
+  rs485_reset();
+  errorCount = 0;
+}
+
+
+void rs485_stop(void)
+{
+  rs485_reset();
+  free(data);
+  data = NULL;
+}
+
+
+void rs485_reset(void)
+{
+  haveSTX = false;
+  available = false;
+  inputPos = 0;
+  startTime = 0;
+}
+
+
+// send a message of "length" bytes (max 255) to other end
+// put STX at start, ETX at end, and add CRC
+void rs485_sendMsg(uint8_t* data, uint8_t length)
+{
+  doWrite(STX);  // STX
+  for (uint8_t i = 0; i < length; i++)
+    sendComplemented(data[i]);
+
+  doWrite(ETX);  // ETX
+  sendComplemented(crc8(data, length));
+}
+
+
+bool rs485_available(void)
+{
+  return available;
+}
+
+
+uint8_t* rs485_getData(void)
+{
+  return data;
+}
+
+
+uint8_t rs485_getLength(void)
+{
+  return inputPos;
+}
+
+
+uint16_t rs485_getErrorCount(void)
+{
+  return errorCount;
+}
+
+
+uint16_t rs485_getPacketStartTime(void)
+{
+  return startTime;
+}
+
+
+bool rs485_isPacketStarted(void)
+{
+  return haveSTX;
+}
+
+
+
+// called periodically from main loop to process data and
+// assemble the finished packet in 'data_'
+
+// returns true if packet received.
+
+// You could implement a timeout by seeing if isPacketStarted() returns
+// true, and if too much time has passed since getPacketStartTime() time.
+bool rs485_update(void)
+{
+  // no data? can't go ahead (eg. begin() not called)
+  if (data == NULL)
+    return false;
+
+  // no callbacks? Can't read
+  if (doAvailable == NULL || doRead == NULL)
+    return false;
+
+  while (doAvailable() > 0)
+  {
+    uint8_t inByte = doRead();
+
+    switch (inByte)
+    {
+      case STX:   // start of text
+        haveSTX = true;
+        haveETX = false;
+        inputPos = 0;
+        firstNibble = true;
+        startTime = millis();
+        break;
+
+      case ETX:   // end of text (now expect the CRC check)
+        haveETX = true;
+        break;
+
+      default:
+        // wait until packet officially starts
+        if (!haveSTX)
+          break;
+
+        // check byte is in valid form (4 bits followed by 4 bits complemented)
+        if ((inByte >> 4) != ((inByte & 0x0F) ^ 0x0F))
+        {
+          rs485_reset();
+          errorCount++;
+          break;  // bad character
+        }
+
+        // convert back
+        inByte >>= 4;
+
+        // high-order nibble?
+        if (firstNibble)
+        {
+          currentByte = inByte;
+          firstNibble = false;
+          break;
+        }
+
+        // low-order nibble
+        currentByte <<= 4;
+        currentByte |= inByte;
+        firstNibble = true;
+
+        // if we have the ETX this must be the CRC
+        if (haveETX)
+        {
+          if (crc8(data, inputPos) != currentByte)
+          {
+            rs485_reset();
+            errorCount++;
+            break;  // bad crc
+          }
+
+          available = true;
+          return true;  // show data ready
+        }
+
+        // keep adding if not full
+        if (inputPos < bufferSize)
+          data[inputPos++] = currentByte;
+        else
+        {
+          rs485_reset(); // overflow, start again
+          errorCount++;
+        }
+
+        break;
+      }
+  }
+
+  return false;  // not ready yet
+}
--- a/module/src/lib/TinyRS485.h
+++ b/module/src/lib/TinyRS485.h
@ -0,0 +1,69 @@
+/*
+ * Stairs lighting
+ * Copyright 2017 (c) Mark van Renswoude
+ *
+ * https://git.x2software.net/pub/Stairs
+ *
+ * Straight up port of Nick Gammon's non-blocking
+ * RS485 library to C and removing the Arduino
+ * framework dependency.
+ *
+ * Source:
+ *    https://www.gammon.com.au/forum/?id=11428
+ *    Devised and written by Nick Gammon.
+ *    Date: 4 December 2012
+ *    Version: 1.0
+*/
+#ifndef __TinyRS485
+#define __TinyRS485
+
+#include <stdint.h>
+#include <stdbool.h>
+
+
+typedef void (*WriteCallback) (uint8_t what); // send a byte to serial port
+typedef uint8_t (*AvailableCallback) (void);  // return number of bytes available
+typedef uint8_t (*ReadCallback) (void);       // read a byte from serial port
+
+
+enum {
+      STX = '\2',   // start of text
+      ETX = '\3'    // end of text
+};  // end of enum
+
+
+// allocate the requested buffer size
+void rs485_begin(ReadCallback readCallback,
+                 AvailableCallback availableCallback,
+                 WriteCallback writeCallback,
+                 uint8_t bufferSize);
+
+// get rid of the buffer
+void rs485_stop(void);
+
+// handle incoming data, return true if packet ready
+bool rs485_update(void);
+
+// reset to no incoming data (eg. after a timeout)
+void rs485_reset(void);
+
+// send data
+void rs485_sendMsg(uint8_t* data, uint8_t length);
+
+// returns true if packet available
+bool rs485_available(void);
+
+// once available, returns the address of the current message
+uint8_t* rs485_getData(void);
+uint8_t rs485_getLength(void);
+
+// return how many errors we have had
+uint16_t rs485_getErrorCount(void);
+
+// return when last packet started
+uint16_t rs485_getPacketStartTime(void);
+
+// return true if a packet has started to be received
+bool rs485_isPacketStarted(void);
+
+#endif
--- a/module/src/lib/TinyUART.c
+++ b/module/src/lib/TinyUART.c
@ -0,0 +1,161 @@
+/*
+ * Stairs lighting
+ * Copyright 2017 (c) Mark van Renswoude
+ *
+ * https://git.x2software.net/pub/Stairs
+ *
+ * Source:
+ * https://github.com/akafugu/helloworld/blob/master/attiny2313/uart.c
+*/
+#include "TinyUART.h"
+#include <avr/interrupt.h>
+#include <avr/io.h>
+#include <avr/pgmspace.h>
+
+
+volatile static uint8_t rx_buffer[BUFFER_SIZE] = "xxxxxxxxxxxxxxxx";
+volatile static uint8_t tx_buffer[BUFFER_SIZE] = "xxxxxxxxxxxxxxxx";
+volatile static uint8_t rx_head = 0;
+volatile static uint8_t rx_tail = 0;
+volatile static uint8_t tx_head = 0;
+volatile static uint8_t tx_tail = 0;
+
+
+void uart_init(void)
+{
+  // set baud rate
+  UBRRH = (uint8_t)(MYUBBR >> 8);
+  UBRRL = (uint8_t)(MYUBBR);
+  // enable receive and transmit
+  UCSRB = (1 << RXEN) | (1 << TXEN) | (1 << RXCIE);
+  // set frame format
+  UCSRC = (1 << USBS) | (3 << UCSZ0);	// asynchron 8n1
+}
+
+
+
+void uart_send(uint8_t c)
+{
+  // wait for empty data register
+  while (!(UCSRA & (1<<UDRE)));
+  // set data into data register
+  UDR = c;
+}
+
+
+uint8_t uart_available(void)
+{
+  return rx_head - rx_tail;
+}
+
+
+uint8_t uart_receive(void)
+{
+  while (!(UCSRA & (1<<RXC)))
+    ;
+  return UDR;
+}
+
+
+
+uint16_t uart_getc(void)
+{
+  uint8_t c = 0;
+  uint8_t tmp_tail = 0;
+  if (rx_head == rx_tail)
+    return UART_NO_DATA;
+
+  tmp_tail = (rx_tail + 1) % BUFFER_SIZE;
+  c = rx_buffer[rx_tail];
+  rx_tail = tmp_tail;
+  return c;
+}
+
+
+
+uint8_t uart_getc_wait(void)
+{
+  uint16_t c;
+  while ((c = uart_getc()) == UART_NO_DATA) {}
+  return c;
+}
+
+
+
+void uart_putc(uint8_t c)
+{
+  uint8_t tmp_head = (tx_head + 1) % BUFFER_SIZE;
+  // wait for space in buffer
+  while (tmp_head == tx_tail)
+    ;
+
+  tx_buffer[tx_head] = c;
+  tx_head = tmp_head;
+  // enable uart data interrupt (send data)
+  UCSRB |= (1<<UDRIE);
+}
+
+
+void uart_puts(const char *s)
+{
+  while (*s)
+  {
+    uart_putc(*s);
+    s++;
+  }
+}
+
+
+
+void uart_puts_P(const char *s)
+{
+  while (pgm_read_byte(s) != 0x00)
+  {
+    uart_putc(pgm_read_byte(s++));
+  }
+}
+
+
+
+/*
+ * ISR User Data Regiser Empty
+ * Send a char out of buffer via UART. If sending is complete, the
+ * interrupt gets disabled.
+ */
+ISR(USART_UDRE_vect)
+{
+  uint8_t tmp_tail = 0;
+  if (tx_head != tx_tail)
+  {
+    tmp_tail = (tx_tail + 1) % BUFFER_SIZE;
+    UDR = tx_buffer[tx_tail];
+    tx_tail = tmp_tail;
+  }
+  else
+  {
+    // disable this interrupt if nothing more to send
+    UCSRB &= ~(1 << UDRIE);
+  }
+}
+
+
+
+/*
+ * ISR RX complete
+ * Receives a char from UART and stores it in ring buffer.
+ */
+ISR(USART_RX_vect)
+{
+  uint8_t tmp_head = 0;
+  tmp_head = (rx_head + 1) % BUFFER_SIZE;
+  if (tmp_head == rx_tail)
+  {
+    // buffer overflow error!
+  }
+  else
+  {
+    rx_buffer[rx_head] = UDR;
+    rx_head = tmp_head;
+  }
+}
+
--- a/module/src/lib/TinyUART.h
+++ b/module/src/lib/TinyUART.h
@ -0,0 +1,86 @@
+/*
+ * Stairs lighting
+ * Copyright 2017 (c) Mark van Renswoude
+ *
+ * https://git.x2software.net/pub/Stairs
+ *
+ * Source:
+ * https://github.com/akafugu/helloworld/blob/master/attiny2313/uart.c
+*/
+#ifndef __TinyUART
+#define __TinyUART
+
+#include <stdint.h>
+
+#define UART_NO_DATA 0x0100
+
+#define BAUD 38400
+// 4.096MHz
+//  4800: 52.3333333
+//  9600: 25.6666667
+// 14400: 16.7777778
+// 19600: 12.06
+// 28800: 7.8889
+// 38400: 5.6667
+
+#define MYUBBR ((F_CPU / (BAUD * 16L)) - 1)
+#define BUFFER_SIZE 16
+
+
+void uart_init(void);
+
+/*
+ * uart_send
+ * Sends a single char to UART without ISR
+ */
+void uart_send(uint8_t c);
+
+
+uint8_t uart_available(void);
+
+
+/*
+ * uart_receive
+ * Receives a single char without ISR
+ */
+uint8_t uart_receive(void);
+
+
+/*
+ * uart_getc
+ * Gets a single char from the receive buffer.
+ * return uint16_r  the received char or UART_NO_DATA
+ */
+uint16_t uart_getc(void);
+
+
+
+/*
+ * uart_getc_wait
+ * Blocking call to getc. Will not return until a char is received.
+ */
+uint8_t uart_getc_wait(void);
+
+
+/*
+ * uart_putc
+ * Puts a single char. Will block until there is enough space in the
+ * send buffer.
+ */
+void uart_putc(uint8_t c);
+
+
+/*
+ * uart_puts
+ * Sends a string.
+ */
+void uart_puts(const char *s);
+
+
+/*
+ * uart_puts_P
+ * Sends a PROGMEM string.
+ */
+void uart_puts_P(const char *s);
+
+#endif
--- a/module/src/lib/VeryTinyBigChars.c
+++ b/module/src/lib/VeryTinyBigChars.c
@ -0,0 +1,134 @@
+/*
+ * Stairs lighting
+ * Copyright 2017 (c) Mark van Renswoude
+ *
+ * https://git.x2software.net/pub/Stairs
+*/
+#include "VeryTinyBigChars.h"
+#include "VeryTinySSD1306.h"
+#include <avr/pgmspace.h>
+
+
+/*
+ * Each digit is composed of a 3x5 grid where each bit represents
+ * whether or not to draw that area. It is then stretched.
+ *
+ * Example:
+ *
+ *   XXX
+ *     X
+ *   XXX
+ *     X
+ *   XXX
+ *
+ * The least significant bit is the top left corner, going down
+ * after that before wrapping to the middle column.
+ */
+const uint16_t ssd1306_digits_32px [] PROGMEM = {
+  0b0111111000111111, // 0
+  0b0100001111110010, // 1
+  0b0101111010111101, // 2
+  0b0111111010110101, // 3
+  0b0111110010000111, // 4
+  0b0111011010110111, // 5
+  0b0111011010111111, // 6
+  0b0111110000100001, // 7
+  0b0111111010111111, // 8
+  0b0111111010110111  // 9
+};
+
+
+void ssd1306_drawchar_32px(uint8_t x, uint16_t matrix)
+{
+  uint8_t column[4];
+
+  // Vertical mode
+  ssd1306_setMemoryAddressingMode(0b01);
+
+  if (ssd1306_currentRenderFrame() == 1)
+  {
+    ssd1306_setPageStartAddress(4);
+    ssd1306_setPageAddress(4, 7);
+  }
+  else
+  {
+    ssd1306_setPageStartAddress(0);
+    ssd1306_setPageAddress(0, 3);
+  }
+
+  ssd1306_setCursor(x, 0);
+
+  ssd1306_startData();
+
+  // Three columns, each shifted 5 bits
+  for (uint8_t shift = 0; shift < 3; shift++)
+  {
+    uint16_t columnValue = matrix >> (shift * 5);
+
+    // It's a bit rough, but it works! First, third and fifth "row" are 6 bits, in between are 7 bits = 32 total
+    column[0] = 0;
+    column[1] = 0;
+    column[2] = 0;
+    column[3] = 0;
+
+    // 0 = 0b0111111000111111
+
+    if (columnValue & 0b1)
+      column[0] |= 0b00111111;
+
+    if (columnValue & 0b10) {
+      column[0] |= 0b11000000;
+      column[1] |= 0b00011111;
+    }
+
+    if (columnValue & 0b100) {
+      column[1] |= 0b11100000;
+      column[2] |= 0b00000111;
+    }
+
+    if (columnValue & 0b1000) {
+      column[2] |= 0b11111000;
+      column[3] |= 0b00000011;
+    }
+
+    if (columnValue & 0b10000)
+      column[3] |= 0b11111100;
+
+    // Each column is 6 pixels wide
+    for (uint8_t repeat = 0; repeat < SSD1306_CharColumnWidth_32px; repeat++)
+    {
+      ssd1306_sendData(column[0]);
+      ssd1306_sendData(column[1]);
+      ssd1306_sendData(column[2]);
+      ssd1306_sendData(column[3]);
+    }
+  }
+
+  ssd1306_endData();
+
+  // Default: horizontal mode
+  ssd1306_setMemoryAddressingMode(0b00);
+  ssd1306_setPageStartAddress(0);
+  ssd1306_setPageAddress(0, 7);
+}
+
+
+void ssd1306_drawdigit_32px(uint8_t x, uint8_t value)
+{
+  if (value < 0 || value > 9)
+    return;
+
+  ssd1306_drawchar_32px(x, pgm_read_word(&ssd1306_digits_32px[value]));
+}
+
+
+void ssd1306_drawplus_32px(uint8_t x)
+{
+  ssd1306_drawchar_32px(x, 0b0001000111000100);
+}
+
+
+void ssd1306_drawminus_32px(uint8_t x)
+{
+  ssd1306_drawchar_32px(x, 0b0001000010000100);
+}
--- a/module/src/lib/VeryTinyBigChars.h
+++ b/module/src/lib/VeryTinyBigChars.h
@ -0,0 +1,24 @@
+/*
+ * Stairs lighting
+ * Copyright 2017 (c) Mark van Renswoude
+ *
+ * https://git.x2software.net/pub/Stairs
+*/
+#ifndef __VeryTinyBigChars
+#define __VeryTinyBigChars
+
+#include <stdint.h>
+
+
+#define SSD1306_CharColumnWidth_32px 6
+#define SSD1306_CharWidth_32px (3 * SSD1306_CharColumnWidth_32px)
+
+void ssd1306_drawchar_32px(uint8_t x, uint16_t matrix);
+
+
+// Draws a digit from 0 to 9, 32 pixels tall
+void ssd1306_drawdigit_32px(uint8_t x, uint8_t value);
+void ssd1306_drawplus_32px(uint8_t x);
+void ssd1306_drawminus_32px(uint8_t x);
+
+#endif
--- a/module/src/lib/VeryTinyI2C.c
+++ b/module/src/lib/VeryTinyI2C.c
@ -0,0 +1,153 @@
+/*
+ * Stairs lighting
+ * Copyright 2017 (c) Mark van Renswoude
+ *
+ * https://git.x2software.net/pub/Stairs
+ *
+ * Minimalistic I2C library for the ATTiny2313's limited space.
+ * Based on David Johnson-Davies' TinyI2C:
+ *   https://github.com/technoblogy/tiny-i2c
+*/
+#include "VeryTinyI2C.h"
+
+
+// Constants
+// Prepare register value to: Clear flags, and set USI to shift 8 bits i.e. count 16 clock edges.
+const unsigned char USISR_8bit = 1<<USISIF | 1<<USIOIF | 1<<USIPF | 1<<USIDC | 0x0<<USICNT0;
+// Prepare register value to: Clear flags, and set USI to shift 1 bit i.e. count 2 clock edges.
+const unsigned char USISR_1bit = 1<<USISIF | 1<<USIOIF | 1<<USIPF | 1<<USIDC | 0xE<<USICNT0;
+
+
+int32_t I2Ccount;
+
+
+
+uint8_t i2c_transfer(uint8_t data)
+{
+  USISR = data;                               // Set USISR according to data.
+                                              // Prepare clocking.
+  data = 0<<USISIE | 0<<USIOIE |              // Interrupts disabled
+         1<<USIWM1 | 0<<USIWM0 |              // Set USI in Two-wire mode.
+         1<<USICS1 | 0<<USICS0 | 1<<USICLK |  // Software clock strobe as source.
+         1<<USITC;                            // Toggle Clock Port.
+  do {
+    DELAY_T2TWI;
+    USICR = data;                             // Generate positive SCL edge.
+    while (!(PIN_USI_CL & 1<<PIN_USI_SCL));   // Wait for SCL to go high.
+    DELAY_T4TWI;
+    USICR = data;                             // Generate negative SCL edge.
+  } while (!(USISR & 1<<USIOIF));             // Check for transfer complete.
+
+  DELAY_T2TWI;
+  data = USIDR;                               // Read out data.
+  USIDR = 0xFF;                               // Release SDA.
+  DDR_USI |= (1<<PIN_USI_SDA);                // Enable SDA as output.
+
+  return data;                                // Return the data from the USIDR
+}
+
+
+void i2c_init(void)
+{
+  PORT_USI |= 1<<PIN_USI_SDA;                 // Enable pullup on SDA.
+  PORT_USI_CL |= 1<<PIN_USI_SCL;              // Enable pullup on SCL.
+
+  DDR_USI_CL |= 1<<PIN_USI_SCL;               // Enable SCL as output.
+  DDR_USI |= 1<<PIN_USI_SDA;                  // Enable SDA as output.
+
+  USIDR = 0xFF;                               // Preload data register with "released level" data.
+  USICR = 0<<USISIE | 0<<USIOIE |             // Disable Interrupts.
+          1<<USIWM1 | 0<<USIWM0 |             // Set USI in Two-wire mode.
+          1<<USICS1 | 0<<USICS0 | 1<<USICLK | // Software stobe as counter clock source
+          0<<USITC;
+  USISR = 1<<USISIF | 1<<USIOIF | 1<<USIPF | 1<<USIDC | // Clear flags,
+          0x0<<USICNT0;                       // and reset counter.
+}
+
+
+uint8_t i2c_read(void)
+{
+  if ((I2Ccount != 0) && (I2Ccount != -1)) I2Ccount--;
+
+  /* Read a byte */
+  DDR_USI &= ~1<<PIN_USI_SDA;                 // Enable SDA as input.
+  uint8_t data = i2c_transfer(USISR_8bit);
+
+  /* Prepare to generate ACK (or NACK in case of End Of Transmission) */
+  if (I2Ccount == 0) USIDR = 0xFF; else USIDR = 0x00;
+  i2c_transfer(USISR_1bit);                   // Generate ACK/NACK.
+
+  return data;                                // Read successfully completed
+}
+
+
+uint8_t i2c_readLast(void)
+{
+  I2Ccount = 0;
+  return i2c_read();
+}
+
+
+bool i2c_write(uint8_t data)
+{
+  /* Write a byte */
+  PORT_USI_CL &= ~(1<<PIN_USI_SCL);           // Pull SCL LOW.
+  USIDR = data;                               // Setup data.
+  i2c_transfer(USISR_8bit);                   // Send 8 bits on bus.
+
+  /* Clock and verify (N)ACK from slave */
+  DDR_USI &= ~(1<<PIN_USI_SDA);               // Enable SDA as input.
+  if (i2c_transfer(USISR_1bit) & 1<<TWI_NACK_BIT) return false;
+
+  return true;                                // Write successfully completed
+}
+
+
+bool i2c_start(uint8_t address, int readcount)
+{
+  if (readcount != 0) { I2Ccount = readcount; readcount = 1; }
+  uint8_t addressRW = address<<1 | readcount;
+
+  /* Release SCL to ensure that (repeated) Start can be performed */
+  PORT_USI_CL |= 1<<PIN_USI_SCL;              // Release SCL.
+  while (!(PIN_USI_CL & 1<<PIN_USI_SCL));     // Verify that SCL becomes high.
+#ifdef TWI_FAST_MODE
+  DELAY_T4TWI;
+#else
+  DELAY_T2TWI;
+#endif
+
+  /* Generate Start Condition */
+  PORT_USI &= ~(1<<PIN_USI_SDA);              // Force SDA LOW.
+  DELAY_T4TWI;
+  PORT_USI_CL &= ~(1<<PIN_USI_SCL);           // Pull SCL LOW.
+  PORT_USI |= 1<<PIN_USI_SDA;                 // Release SDA.
+
+  if (!(USISR & 1<<USISIF)) return false;
+
+  /*Write address */
+  PORT_USI_CL &= ~(1<<PIN_USI_SCL);           // Pull SCL LOW.
+  USIDR = addressRW;                          // Setup data.
+  i2c_transfer(USISR_8bit);                   // Send 8 bits on bus.
+
+  /* Clock and verify (N)ACK from slave */
+  DDR_USI &= ~(1<<PIN_USI_SDA);               // Enable SDA as input.
+  if (i2c_transfer(USISR_1bit) & 1<<TWI_NACK_BIT) return false; // No ACK
+
+  return true;                                // Start successfully completed
+}
+
+bool i2c_restart(uint8_t address, int readcount)
+{
+  return i2c_start(address, readcount);
+}
+
+void i2c_stop(void)
+{
+  PORT_USI &= ~(1<<PIN_USI_SDA);              // Pull SDA low.
+  PORT_USI_CL |= 1<<PIN_USI_SCL;              // Release SCL.
+  while (!(PIN_USI_CL & 1<<PIN_USI_SCL));     // Wait for SCL to go high.
+  DELAY_T4TWI;
+  PORT_USI |= 1<<PIN_USI_SDA;                 // Release SDA.
+  DELAY_T2TWI;
+}
--- a/module/src/lib/VeryTinyI2C.h
+++ b/module/src/lib/VeryTinyI2C.h
@ -0,0 +1,54 @@
+/*
+ * Stairs lighting
+ * Copyright 2017 (c) Mark van Renswoude
+ *
+ * https://git.x2software.net/pub/Stairs
+ *
+ * Straight up port of David Johnson-Davies' TinyI2C to C
+ * and without the Arduino framework dependency.
+ *   https://github.com/technoblogy/tiny-i2c
+*/
+#ifndef __VeryTinyI2C
+#define __VeryTinyI2C
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <avr/io.h>
+#include <util/delay.h>
+
+// Defines
+//#define TWI_FAST_MODE
+
+#ifdef TWI_FAST_MODE                 // TWI FAST mode timing limits. SCL = 100-400kHz
+#define DELAY_T2TWI (_delay_us(2))   // >1.3us
+#define DELAY_T4TWI (_delay_us(1))   // >0.6us
+#else                                // TWI STANDARD mode timing limits. SCL <= 100kHz
+#define DELAY_T2TWI (_delay_us(5))   // >4.7us
+#define DELAY_T4TWI (_delay_us(4))   // >4.0us
+#endif
+
+#define TWI_NACK_BIT 0 // Bit position for (N)ACK bit.
+
+
+// These are valid for the ATTiny2313
+#define DDR_USI             DDRB
+#define DDR_USI_CL          DDR_USI
+#define PORT_USI            PORTB
+#define PORT_USI_CL         PORT_USI
+#define PIN_USI             PINB
+#define PIN_USI_CL          PIN_USI
+#define PORT_USI_SDA        PB5
+#define PORT_USI_SCL        PB7
+#define PIN_USI_SDA         PINB5
+#define PIN_USI_SCL         PINB7
+
+
+void i2c_init(void);
+uint8_t i2c_read(void);
+uint8_t i2c_readLast(void);
+bool i2c_write(uint8_t data);
+bool i2c_start(uint8_t address, int readcount);
+bool i2c_restart(uint8_t address, int readcount);
+void i2c_stop(void);
+
+#endif
--- a/module/src/lib/VeryTinySSD1306.c
+++ b/module/src/lib/VeryTinySSD1306.c
@ -0,0 +1,517 @@
+/*
+ * Stairs lighting
+ * Copyright 2017 (c) Mark van Renswoude
+ *
+ * https://git.x2software.net/pub/Stairs
+ *
+ * Port of Stephen Denne's Tiny4kOLED to C
+ * and without the Arduino framework dependency.
+ *   https://github.com/technoblogy/tiny-i2c
+*/
+#include "VeryTinySSD1306.h"
+#include <avr/pgmspace.h>
+#include "VeryTinyI2C.h"
+
+#define SSD1306_PAGES 4
+
+#define SSD1306_COMMAND 0x00
+#define SSD1306_DATA 0x40
+
+// ----------------------------------------------------------------------------
+
+// Some code based on "IIC_without_ACK" by http://www.14blog.com/archives/1358
+
+const uint8_t ssd1306_init_sequence [] PROGMEM = { // Initialization Sequence
+//  0xAE,     // Display OFF (sleep mode)
+//  0x20, 0b10,   // Set Memory Addressing Mode
+          // 00=Horizontal Addressing Mode; 01=Vertical Addressing Mode;
+          // 10=Page Addressing Mode (RESET); 11=Invalid
+//  0xB0,     // Set Page Start Address for Page Addressing Mode, 0-7
+  0xC8,     // Set COM Output Scan Direction
+//  0x00,     // ---set low column address
+//  0x10,     // ---set high column address
+//  0x40,     // --set start line address
+//  0x81, 0x7F,   // Set contrast control register
+  0xA1,     // Set Segment Re-map. A0=address mapped; A1=address 127 mapped.
+//  0xA6,     // Set display mode. A6=Normal; A7=Inverse
+  0xA8, 0x1F,   // Set multiplex ratio(1 to 64)
+//  0xA4,     // Output RAM to Display
+          // 0xA4=Output follows RAM content; 0xA5,Output ignores RAM content
+//  0xD3, 0x00,   // Set display offset. 00 = no offset
+//  0xD5, 0x80,   // --set display clock divide ratio/oscillator frequency
+//  0xD9, 0x22,   // Set pre-charge period
+  0xDA, 0x02,   // Set com pins hardware configuration
+//  0xDB, 0x20,   // --set vcomh 0x20 = 0.77xVcc
+  0x8D, 0x14    // Set DC-DC enable
+};
+
+
+const DCfont *oledFont = 0;
+uint8_t oledX = 0, oledY = 0;
+uint8_t renderingFrame = 0xB0, drawingFrame = 0x40;
+
+
+void ssd1306_send_command_start(void)
+{
+  i2c_start(SSD1306, 0);
+  i2c_write(SSD1306_COMMAND);
+}
+
+void ssd1306_send_data_start(void)
+{
+  i2c_start(SSD1306, 0);
+  i2c_write(SSD1306_DATA);
+}
+
+void ssd1306_send_command_byte(uint8_t byte)
+{
+  if (i2c_write(byte) == 0)
+  {
+    i2c_stop();
+    ssd1306_send_command_start();
+    i2c_write(byte);
+  }
+}
+
+void ssd1306_send_data_byte(uint8_t byte)
+{
+  if (i2c_write(byte) == 0)
+  {
+    i2c_stop();
+    ssd1306_send_data_start();
+    i2c_write(byte);
+  }
+}
+
+void ssd1306_send_command(uint8_t command)
+{
+  ssd1306_send_command_start();
+  i2c_write(command);
+  i2c_stop();
+}
+
+void ssd1306_send_command2(uint8_t command1, uint8_t command2)
+{
+  ssd1306_send_command_start();
+  i2c_write(command1);
+  i2c_write(command2);
+  i2c_stop();
+}
+
+void ssd1306_send_command3(uint8_t command1, uint8_t command2, uint8_t command3)
+{
+  ssd1306_send_command_start();
+  i2c_write(command1);
+  i2c_write(command2);
+  i2c_write(command3);
+  i2c_stop();
+}
+
+void ssd1306_send_command6(uint8_t command1, uint8_t command2, uint8_t command3, uint8_t command4, uint8_t command5, uint8_t command6)
+{
+  ssd1306_send_command_start();
+  i2c_write(command1);
+  i2c_write(command2);
+  i2c_write(command3);
+  i2c_write(command4);
+  i2c_write(command5);
+  i2c_write(command6);
+  i2c_stop();
+}
+
+void ssd1306_send_command7(uint8_t command1, uint8_t command2, uint8_t command3, uint8_t command4, uint8_t command5, uint8_t command6, uint8_t command7)
+{
+  ssd1306_send_command_start();
+  i2c_write(command1);
+  i2c_write(command2);
+  i2c_write(command3);
+  i2c_write(command4);
+  i2c_write(command5);
+  i2c_write(command6);
+  i2c_write(command7);
+  i2c_stop();
+}
+
+void ssd1306_begin_default(void)
+{
+  ssd1306_begin(sizeof(ssd1306_init_sequence), ssd1306_init_sequence);
+}
+
+void ssd1306_begin(uint8_t init_sequence_length, const uint8_t init_sequence [])
+{
+  i2c_init();
+
+  ssd1306_send_command_start();
+  for (uint8_t i = 0; i < init_sequence_length; i++)
+  {
+    ssd1306_send_command_byte(pgm_read_byte(&init_sequence[i]));
+  }
+  i2c_stop();
+}
+
+void ssd1306_setFont(const DCfont *font)
+{
+  oledFont = font;
+}
+
+void ssd1306_setCursor(uint8_t x, uint8_t y)
+{
+  ssd1306_send_command3(renderingFrame | (y & 0x07), 0x10 | ((x & 0xf0) >> 4), x & 0x0f);
+  oledX = x;
+  oledY = y;
+}
+
+void ssd1306_clear(void)
+{
+  ssd1306_fill(0x00);
+}
+
+void ssd1306_fill(uint8_t fill)
+{
+  for (uint8_t m = 0; m < SSD1306_PAGES; m++)
+  {
+    ssd1306_setCursor(0, m);
+    ssd1306_fillToEOL(fill);
+  }
+  ssd1306_setCursor(0, 0);
+}
+
+void ssd1306_newLine_height(uint8_t fontHeight)
+{
+  oledY+=fontHeight;
+  if (oledY > SSD1306_PAGES - fontHeight)
+  {
+    oledY = SSD1306_PAGES - fontHeight;
+  }
+  ssd1306_setCursor(0, oledY);
+}
+
+void ssd1306_newLine(void)
+{
+  ssd1306_newLine_height(oledFont->height);
+}
+
+uint8_t ssd1306_write(uint8_t c)
+{
+  if (!oledFont)
+    return 1;
+
+  if (c == '\r')
+    return 1;
+
+  uint8_t h = oledFont->height;
+
+  if (c == '\n')
+  {
+    ssd1306_newLine_height(h);
+    return 1;
+  }
+
+  uint8_t w = oledFont->width;
+
+  if (oledX > ((uint8_t)128 - w))
+  {
+    ssd1306_newLine_height(h);
+  }
+
+  uint16_t offset = ((uint16_t)c - oledFont->first) * w * h;
+  uint8_t line = h;
+  do
+  {
+    ssd1306_send_data_start();
+    for (uint8_t i = 0; i < w; i++)
+    {
+      ssd1306_send_data_byte(pgm_read_byte(&(oledFont->bitmap[offset++])));
+    }
+    i2c_stop();
+    if (h == 1)
+    {
+      oledX+=w;
+    }
+    else
+    {
+      if (line > 1)
+      {
+        ssd1306_setCursor(oledX, oledY + 1);
+      }
+      else
+      {
+        ssd1306_setCursor(oledX + w, oledY - (h - 1));
+      }
+    }
+  }
+  while (--line);
+  return 1;
+}
+
+void ssd1306_bitmap(uint8_t x0, uint8_t y0, uint8_t x1, uint8_t y1, const uint8_t bitmap[])
+{
+  uint16_t j = 0;
+  for (uint8_t y = y0; y < y1; y++)
+  {
+    ssd1306_setCursor(x0,y);
+    ssd1306_send_data_start();
+    for (uint8_t x = x0; x < x1; x++)
+    {
+      ssd1306_send_data_byte(pgm_read_byte(&bitmap[j++]));
+    }
+    i2c_stop();
+  }
+  ssd1306_setCursor(0, 0);
+}
+
+void ssd1306_clearToEOL(void)
+{
+  ssd1306_fillToEOL(0x00);
+}
+
+void ssd1306_fillToEOL(uint8_t fill)
+{
+  ssd1306_fillLength(fill, 128 - oledX);
+}
+
+void ssd1306_fillLength(uint8_t fill, uint8_t length)
+{
+  oledX += length;
+  ssd1306_send_data_start();
+  do
+  {
+    ssd1306_send_data_byte(fill);
+  }
+  while (--length);
+  i2c_stop();
+}
+
+void ssd1306_startData(void)
+{
+  ssd1306_send_data_start();
+}
+
+void ssd1306_sendData(const uint8_t data)
+{
+  ssd1306_send_data_byte(data);
+}
+
+void ssd1306_endData(void)
+{
+  i2c_stop();
+}
+
+// Double Buffering Commands
+
+void ssd1306_switchRenderFrame(void)
+{
+  renderingFrame ^= 0x04;
+}
+
+void ssd1306_switchDisplayFrame(void)
+{
+  drawingFrame ^= 0x20;
+  ssd1306_send_command(drawingFrame);
+}
+
+void ssd1306_switchFrame(void)
+{
+  ssd1306_switchDisplayFrame();
+  ssd1306_switchRenderFrame();
+}
+
+uint8_t ssd1306_currentRenderFrame(void)
+{
+  return (renderingFrame >> 2) & 0x01;
+}
+
+uint8_t ssd1306_currentDisplayFrame(void)
+{
+  return (drawingFrame >> 5) & 0x01;
+}
+
+// 1. Fundamental Command Table
+
+void ssd1306_setContrast(uint8_t contrast)
+{
+  ssd1306_send_command2(0x81,contrast);
+}
+
+void ssd1306_setEntireDisplayOn(bool enable)
+{
+  if (enable)
+    ssd1306_send_command(0xA5);
+  else
+    ssd1306_send_command(0xA4);
+}
+
+void ssd1306_setInverse(bool enable)
+{
+  if (enable)
+    ssd1306_send_command(0xA7);
+  else
+    ssd1306_send_command(0xA6);
+}
+
+void ssd1306_off(void)
+{
+  ssd1306_send_command(0xAE);
+}
+
+void ssd1306_on(void)
+{
+  ssd1306_send_command(0xAF);
+}
+
+// 2. Scrolling Command Table
+
+void ssd1306_scrollRight(uint8_t startPage, uint8_t interval, uint8_t endPage)
+{
+  ssd1306_send_command7(0x26, 0x00, startPage, interval, endPage, 0x00, 0xFF);
+}
+
+void ssd1306_scrollLeft(uint8_t startPage, uint8_t interval, uint8_t endPage)
+{
+  ssd1306_send_command7(0x27, 0x00, startPage, interval, endPage, 0x00, 0xFF);
+}
+
+void ssd1306_scrollRightOffset(uint8_t startPage, uint8_t interval, uint8_t endPage, uint8_t offset)
+{
+  ssd1306_send_command6(0x29, 0x00, startPage, interval, endPage, offset);
+}
+
+void ssd1306_scrollLeftOffset(uint8_t startPage, uint8_t interval, uint8_t endPage, uint8_t offset)
+{
+  ssd1306_send_command6(0x2A, 0x00, startPage, interval, endPage, offset);
+}
+
+void ssd1306_deactivateScroll(void)
+{
+  ssd1306_send_command(0x2E);
+}
+
+void ssd1306_activateScroll(void)
+{
+  ssd1306_send_command(0x2F);
+}
+
+void ssd1306_setVerticalScrollArea(uint8_t top, uint8_t rows)
+{
+  ssd1306_send_command3(0xA3, top, rows);
+}
+
+// 3. Addressing Setting Command Table
+
+void ssd1306_setColumnStartAddress(uint8_t startAddress)
+{
+  ssd1306_send_command2(startAddress & 0x0F, startAddress >> 4);
+}
+
+void ssd1306_setMemoryAddressingMode(uint8_t mode)
+{
+  ssd1306_send_command2(0x20, mode & 0x03);
+}
+
+void ssd1306_setColumnAddress(uint8_t startAddress, uint8_t endAddress)
+{
+  ssd1306_send_command3(0x21, startAddress & 0x7F, endAddress & 0x7F);
+}
+
+void ssd1306_setPageAddress(uint8_t startPage, uint8_t endPage)
+{
+  ssd1306_send_command3(0x22, startPage & 0x07, endPage & 0x07);
+}
+
+void ssd1306_setPageStartAddress(uint8_t startPage)
+{
+  ssd1306_send_command(0xB0 | (startPage & 0x07));
+}
+
+// 4. Hardware Configuration (Panel resolution and layout related) Command Table
+
+void ssd1306_setDisplayStartLine(uint8_t startLine)
+{
+  ssd1306_send_command(0x40 | (startLine & 0x3F));
+}
+
+void ssd1306_setSegmentRemap(uint8_t remap)
+{
+  ssd1306_send_command(0xA0 | (remap & 0x01));
+}
+
+void ssd1306_setMultiplexRatio(uint8_t mux)
+{
+  ssd1306_send_command2(0xA8, (mux - 1) & 0x3F);
+}
+
+void ssd1306_setComOutputDirection(uint8_t direction)
+{
+  ssd1306_send_command(0xC0 | ((direction & 0x01)<<3));
+}
+
+void ssd1306_setDisplayOffset(uint8_t offset)
+{
+  ssd1306_send_command2(0xD3, offset & 0x3F);
+}
+
+void ssd1306_setComPinsHardwareConfiguration(uint8_t alternative, uint8_t enableLeftRightRemap)
+{
+  ssd1306_send_command2(0xDA, ((enableLeftRightRemap & 0x01) << 5) | ((alternative & 0x01) << 4) | 0x02 );
+}
+
+// 5. Timing and Driving Scheme Setting Command table
+
+void ssd1306_setDisplayClock(uint8_t divideRatio, uint8_t oscillatorFrequency)
+{
+  ssd1306_send_command2(0xD5, ((oscillatorFrequency & 0x0F) << 4) | ((divideRatio -1) & 0x0F));
+}
+
+void ssd1306_setPrechargePeriod(uint8_t phaseOnePeriod, uint8_t phaseTwoPeriod)
+{
+  ssd1306_send_command2(0xD9, ((phaseTwoPeriod & 0x0F) << 4) | (phaseOnePeriod & 0x0F));
+}
+
+void ssd1306_setVcomhDeselectLevel(uint8_t level)
+{
+  ssd1306_send_command2(0xDB, (level & 0x07) << 4);
+}
+
+void ssd1306_nop(void)
+{
+  ssd1306_send_command(0xE3);
+}
+
+// 6. Advance Graphic Command table
+
+void ssd1306_fadeOut(uint8_t interval)
+{
+  ssd1306_send_command2(0x23, (0x20 | (interval & 0x0F)));
+}
+
+void ssd1306_blink(uint8_t interval)
+{
+  ssd1306_send_command2(0x23, (0x30 | (interval & 0x0F)));
+}
+
+void ssd1306_disableFadeOutAndBlinking(void)
+{
+  ssd1306_send_command2(0x23, 0x00);
+}
+
+void ssd1306_enableZoomIn(void)
+{
+  ssd1306_send_command2(0xD6, 0x01);
+}
+
+void ssd1306_disableZoomIn(void)
+{
+  ssd1306_send_command2(0xD6, 0x00);
+}
+
+// Charge Pump Settings
+
+void ssd1306_enableChargePump(void)
+{
+  ssd1306_send_command2(0x8D, 0x14);
+}
+
+void ssd1306_disableChargePump(void)
+{
+  ssd1306_send_command2(0x8D, 0x10);
+}
--- a/module/src/lib/VeryTinySSD1306.h
+++ b/module/src/lib/VeryTinySSD1306.h
@ -0,0 +1,113 @@
+/*
+ * Stairs lighting
+ * Copyright 2017 (c) Mark van Renswoude
+ *
+ * https://git.x2software.net/pub/Stairs
+ *
+ * Port of Stephen Denne's Tiny4kOLED to C,
+ * without the Arduino framework dependency but with
+ * a hardcoded dependency on VeryTinyI2C.
+ *
+ * Original:
+ *   https://github.com/technoblogy/tiny-i2c
+*/
+#ifndef __VeryTinySSD1306
+#define __VeryTinySSD1306
+
+#include <stdint.h>
+#include <stdbool.h>
+
+
+typedef struct {
+  uint8_t *bitmap;      // character bitmaps data
+  uint8_t width;        // character width in pixels
+  uint8_t height;       // character height in pages (8 pixels)
+  uint8_t first, last;  // ASCII extents
+} DCfont;
+
+
+#define SSD1306_DisplayWidth 128
+#define SSD1306_DisplayHeight 32
+
+#ifndef SSD1306
+#define SSD1306   0x3C  // Slave address
+#endif
+
+
+void ssd1306_begin_default(void);
+void ssd1306_begin(uint8_t init_sequence_length, const uint8_t init_sequence []);
+void ssd1306_switchRenderFrame(void);
+void ssd1306_switchDisplayFrame(void);
+void ssd1306_switchFrame(void);
+uint8_t ssd1306_currentRenderFrame(void);
+uint8_t ssd1306_currentDisplayFrame(void);
+void ssd1306_setFont(const DCfont *font);
+void ssd1306_setCursor(uint8_t x, uint8_t y);
+void ssd1306_newLine();
+void ssd1306_fill(uint8_t fill);
+void ssd1306_fillToEOL(uint8_t fill);
+void ssd1306_fillLength(uint8_t fill, uint8_t length);
+void ssd1306_clear(void);
+void ssd1306_clearToEOL(void);
+void ssd1306_bitmap(uint8_t x0, uint8_t y0, uint8_t x1, uint8_t y1, const uint8_t bitmap[]);
+void ssd1306_startData(void);
+void ssd1306_sendData(const uint8_t data);
+void ssd1306_endData(void);
+
+// 1. Fundamental Command Table
+
+void ssd1306_setContrast(uint8_t contrast);
+void ssd1306_setEntireDisplayOn(bool enable);
+void ssd1306_setInverse(bool enable);
+void ssd1306_off(void);
+void ssd1306_on(void);
+
+// 2. Scrolling Command Table
+
+void ssd1306_scrollRight(uint8_t startPage, uint8_t interval, uint8_t endPage);
+void ssd1306_scrollLeft(uint8_t startPage, uint8_t interval, uint8_t endPage);
+void ssd1306_scrollRightOffset(uint8_t startPage, uint8_t interval, uint8_t endPage, uint8_t offset);
+void ssd1306_scrollLeftOffset(uint8_t startPage, uint8_t interval, uint8_t endPage, uint8_t offset);
+void ssd1306_deactivateScroll(void);
+void ssd1306_activateScroll(void);
+void ssd1306_setVerticalScrollArea(uint8_t top, uint8_t rows);
+
+// 3. Addressing Setting Command Table
+void ssd1306_setColumnStartAddress(uint8_t startAddress);
+void ssd1306_setMemoryAddressingMode(uint8_t mode);
+void ssd1306_setColumnAddress(uint8_t startAddress, uint8_t endAddress);
+void ssd1306_setPageAddress(uint8_t startPage, uint8_t endPage);
+void ssd1306_setPageStartAddress(uint8_t startPage);
+
+// 4. Hardware Configuration (Panel resolution and layout related) Command Table
+
+void ssd1306_setDisplayStartLine(uint8_t startLine);
+void ssd1306_setSegmentRemap(uint8_t remap);
+void ssd1306_setMultiplexRatio(uint8_t mux);
+void ssd1306_setComOutputDirection(uint8_t direction);
+void ssd1306_setDisplayOffset(uint8_t offset);
+void ssd1306_setComPinsHardwareConfiguration(uint8_t alternative, uint8_t enableLeftRightRemap);
+
+// 5. Timing and Driving Scheme Setting Command table
+
+void ssd1306_setDisplayClock(uint8_t divideRatio, uint8_t oscillatorFrequency);
+void ssd1306_setPrechargePeriod(uint8_t phaseOnePeriod, uint8_t phaseTwoPeriod);
+void ssd1306_setVcomhDeselectLevel(uint8_t level);
+void ssd1306_nop(void);
+
+// 6. Advance Graphic Command table
+
+void ssd1306_fadeOut(uint8_t interval);
+void ssd1306_blink(uint8_t interval);
+void ssd1306_disableFadeOutAndBlinking(void);
+void ssd1306_enableZoomIn(void);
+void ssd1306_disableZoomIn(void);
+
+// Charge Pump Settings
+
+void ssd1306_enableChargePump(void);
+void ssd1306_disableChargePump(void);
+
+uint8_t ssd1306_write(uint8_t c);
+
+#endif
--- a/module/src/main.c
+++ b/module/src/main.c
@ -0,0 +1,83 @@
+/*
+ * Stairs lighting
+ * Copyright 2017 (c) Mark van Renswoude
+ *
+ * https://git.x2software.net/pub/Stairs
+*/
+#include <stdint.h>
+#include <avr/interrupt.h>
+#include <util/delay.h>
+#include "lib/TinyMillis.h"
+#include "lib/TinyUART.h"
+#include "lib/TinyRS485.h"
+#include "global.h"
+#include "display.h"
+
+#define STEPS_DELAY_SHORT 200
+#define STEPS_DELAY 800
+#define STEPS_DELAY_LONG 2000
+
+
+uint8_t uartRead(void)
+{
+  return uart_getc();
+}
+
+uint8_t uartAvailable(void)
+{
+  return uart_available();
+}
+
+void uartWrite(uint8_t what)
+{
+  uart_putc(what);
+}
+
+
+typedef enum
+{
+  WaitingForComm,
+  Connected
+} State;
+
+
+State currentState = WaitingForComm;
+
+
+int main(void)
+{
+  // Allow peripherals to start up before sending messages
+  _delay_ms(40);
+
+  global_init();
+  millis_init();
+  sei();
+
+  uart_init();
+  rs485_begin(uartRead, uartAvailable, uartWrite, 20);
+
+  display_init();
+
+  for (;;)
+  {
+    if (rs485_update())
+    {
+      // TODO get data
+      currentState = Connected;
+    }
+
+    switch (currentState)
+    {
+      case WaitingForComm:
+        display_drawWait();
+        break;
+
+      case Connected:
+        display_drawIndex();
+        break;
+    }
+  }
+
+
+  return 0;
+}
--- a/module/upload.bat
+++ b/module/upload.bat
@ -0,0 +1 @@
+@pio run -t program
--- a/src/assets/version.h
+++ b/src/assets/version.h
@ -2,12 +2,12 @@
 #define __assets_version

 const uint8_t VersionMajor = 2;
-const uint8_t VersionMinor = 1;
+const uint8_t VersionMinor = 2;
 const uint8_t VersionPatch = 0;
 const uint8_t VersionMetadata = 0;
-const char VersionBranch[] = "master";
-const char VersionSemVer[] = "2.1.0";
-const char VersionFullSemVer[] = "2.1.0";
+const char VersionBranch[] = "develop";
+const char VersionSemVer[] = "2.2.0-unstable.1";
+const char VersionFullSemVer[] = "2.2.0-unstable.1";
 const char VersionCommitDate[] = "2018-04-29";

 #endif
Author	SHA1	Message	Date
Mark van Renswoude	5f89b3efd2	First version of submodule implementation Based on ATTiny2313 / ATTiny4313	2018-11-18 11:16:33 +01:00
Mark van Renswoude	3a8b22fc4a	Merge tag '2.1' into develop release 2.1 2.1	2018-04-29 11:06:33 +02:00
Mark van Renswoude	a236588ebb	Merge branch 'release/2.1' # Conflicts: # src/assets/version.h # src/main.cpp # web/dist/bundle.js	2018-04-29 11:04:48 +02:00