Add second serial interface for debug logging in SelfomatController Arduino sketch (firmware)

[maehw]

Would be nice if somebody could implement this (might do it myself).
Depending on the Arduino target hardware, it should be possible to use another UART interface or a software serial + a USB/serial converter to log on a PC.

[maehw]

NeoSWSerial library might do the trick as Arduino UNO only has a single serial and SoftwareSerial conflicts with PinChangeInterrupt. TX direction is enough for logging.

However, #define NEOSWSERIAL_EXTERNAL_PCINT must be uncommented "to use your own PCINT ISRs".

Was able to compile it, but not able to test it yet.

Some snippets:

#define PIN_SWSERIAL_RX 12
#define PIN_SWSERIAL_TX 13
(...)
extern NeoSWSerial swSerial;

  swSerial.begin(38400);
  swSerial.ignore(); // do not use RX
(...)
  swSerial.println("Pin setup complete.");

[maehw]

I can provide a proof of concept in a separate branch, if you like @ClemensElflein .

[ClemensElflein]

Sounds good! I currently don't have the time to work on the self-o-mat, but I'll have a look when the weather is bad and I can't work on my open mower project.