Anyone know how to change the serial number that the Printrboard reports? I have two of them and need to set a UDEV rule to differentiate them, but all the information is identical between them.
Have you changed the firmware setting for serial port? It is at the very top of the configuration.h file. Instructions for flashing here: http://help.printrbot.com/Guide/How+to+Reflash+Firmware/78
Not sure if that will differentiate them or not, since it says the bootloader will still use Serial Port 0. 
@ThantiK Looks like that will only change the pins that the mcu uses to communicate on and not affect the serial number.