control48

I believe the solution has been posted by pharaohamps in https://forum.arduino.cc/index.php?topic=341054.30 where the two lines in SoftwareSerial.cpp: 169: _transmitPortRegister = portOutputRegister(port); 182: _receivePortRegister = portInputRegister(port); should be corrected to: 169:...

I used the following link to download the original files. https://github.com/arduino-org/Arduino/tree/1364019868e2ad044c87dd0f143052a92eebda98/hardware/arduino/samd/libraries/SoftwareSerial