OBP40 
=====

Important information: 

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THIS BRANCH IS NOT INTENDED TO MERGE INTO "master"!
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platformio.ini adapted to compile directly

Differences to OBP60
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- no GPS
- no RTC
- no LEDs
- no environment sensor
- no key lock
- no swipe
- only 5 keys

+ SD card interface


Keyboard
--------

Keycode   Key              Function
-------- ---------------- -------------------------
  1       Menu key         Key 1 of OBP60 (left)
  2       Exit key         Key 2 of OBP60
  3       Jog-Dial press
  9       Jog-Dial down    Next page
 10       Jog-Dial up      Previous page