Update interface reference for greater compatibility

[duncanallwood]

Current build uses "serial:/dev/ttyS0" in the startup script, the recent raspberry pi's expect you to use "/dev/serial0", which is an alias provided to either /dev/ttyAMA0 or /dev/ttyS0, depending on your exact raspbian OS version. Updating the scripts to /dev/serial0 will provide greater compatibility.

[tgryffyn]

Thanks for that.. took me a while to figure it out, meant to send a note about it, but that should definitely help. I'm using a Raspberry Pi 3 (regular, not plus). If anyone's curious, the reason I found stated was that the Pi3, Pi3+ and ZeroW use ttyAMA0 for bluetooth communications. You can disable bluetooth and/or remap the serial port back to ttyAMA0, but the easier solution is just to use serial0 which the system should have mapped to the proper, available, serial device.