Users are not going to look at the serial stream themself and a python program is going to handle all the communications so this: https://github.com/StartleStudio/nixie/blob/master/firmware/1.0/nixie_atmega_firmware_1.0/nixie_atmega_firmware_1.0.ino#L44 won;t work, because it is a human readable message and not something for a program. So change the serial write to something like ERR1 and define EER1 in the python program, so that when the program gets that error, it prints the error message
Users are not going to look at the serial stream themself and a python program is going to handle all the communications so this: https://github.com/StartleStudio/nixie/blob/master/firmware/1.0/nixie_atmega_firmware_1.0/nixie_atmega_firmware_1.0.ino#L44 won;t work, because it is a human readable message and not something for a program. So change the serial write to something like ERR1 and define EER1 in the python program, so that when the program gets that error, it prints the error message