Uploading never ends

Will typically be caused by something bad in your program but a way to force it to complete so you can troubleshoot what is happening is to press the Arduino reset button as soon as you see “Compiling sketch” change to “Uploading…” as you program the Arduino. Possible causes we’ve come across wdt if used, […]

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Program won’t run

Waiting for USB Serial Are you using this with your Serial.begin command on an Arduino with USB serial? We found on the MKR GSM 1400 and Arduino Micro this would cause the program to not run if the Arduino serial monitor was not open! Doing this fixed it:

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