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README

@@ -6,22 +6,16 @@ OBP Keypad 6/1
 - Configuration mode via long key press (>3 s) on DST
     - Deep sleep and reset can be activated from configuration mode
 - Configuration via web interface
+- Firmware update via web interface
 - Buzzer for key press feedback
   passive, allowing tones to be programmed via PWM
 - I²C temperature/humidity sensor SHT31
+- Light sensor, e.g. for automatic LED dimming
 
 Later options
 - Brightness sensor, e.g. for automatic LED dimming
   Reassign pins?:
     I²C -> D0, D1 (GPIO 44, 43)
-    Reorder LEDs: A0 to A5 for the 6 LEDs
-    A6 as analog input for sensor
-    A7 reserved
-- Version 2
-  - Seatalk 1 connector for Raymarine tiller pilot remote control
-- Version X, always optional
-  - 2.9" ePaper display to show key assignments
-    also means: much more complex enclosure
 
 To prevent the LEDs from being distracting, switching is possible between
 permanent illumination and only brief flashing on actuation:
@@ -63,6 +57,9 @@ Connections
       To connect LED PCB
         JST 2.54 XH 7-pin connector -> LEDs + GND
 
+      To connect light sensor to LED PCB
+        2 pins for +3.3V and GPIO 
+
       For I²C modules
         2x 4pin-pin female headers 
         qwiic-connector (JST_SH_BM04B-SRSS-TB_04x1.00mm)
@@ -83,10 +80,11 @@ Connections
 Notes
 -----
 
-With the currently used pre-wired buttons, the connection wires are
-extremely delicate. Easy to break and poor workmanship.
+Do not use used pre-wired buttons, the connection wires are extremely
+delicate. Easy to break and poor workmanship.
 Better to use buttons without cables. Solid wire with 0.25 mm² seems
-best suited, both on the button side and for insertion into the terminal block.
+best suited, both on the button side and for insertion into the terminal
+block.
 
 There are various variants with different spring forces.
 Final button selection still pending.
@@ -105,33 +103,7 @@ Do not use the 3.3 V pin. It is intended as an output!
 The mapping from Nano pins to GPIOs still needs to be verified.
 The Nano can be operated in two different mapping modes!
 
- KEY   Color   Pin      Remarks 
------ ------- -------- --------------------
- 1      B       D2      GPIO5
- 2      B       D3      GPIO6
- 3      B       D4      GPIO7
- 4      B       D5      GPIO8
- 5      B       D6      GPIO9
- 6      Y       D7      GPIO10
- DST    Y       D8      GPIO17 Destination, configuration
-
- LED    Pin        Remarks
------- ---------- ---------------------- 
- A      A0         GPIO1 
- B      A1         GPIO2
- C      A2         GPIO3
- RGB-R  A3         GPIO4
- RGB-G  A6         GPIO13
- RGB-B  A7         GPIO14
-
- CAN    Pin        Remarks
------- ---------- ---------------------- 
- TX     D9         GPIO18
- RX     D10        GPIO21
-
-BUZZ    Pin        Remarks
------- ---------- ----------------------
-TBD
+The pin assignments are defined in main.h. 
 
 Bill of materials (WIP)
 -----------------