@danielm Did you ever get an answer to WHY 'AT+CESQ' fails to return: RECEIVED SIGNAL STRENGTH LEVEL CHANNEL BIT ERROR RATE RECEIVED SINGAL CODE POWER RATIO OF RECEIVED ENERGY i.e. the first 4 parameters in the command?

@william About topic 1: I do not know that the LoPy has any of that by itself. There is a 3.3V power regulator, but thta cannot handle string interference, which may com in at each and every signal line. Topic 2: The watchdog is software, can handle some run-away software situation. You might need a separate hardware watchdog which pulls reset.