I’ve had a Fez Cobra + RS21 module running for about a month non stop, however today noticed it was no longer working. I’ve tried to connect to it via MFDeploy, but I just get the error ‘Connecting to …Failure - Device is invalid or not responding’.
I know my program is not executing on it either as IO48 is partially on, where as I turn it off on startup. The lights on the board that are on are:
PWR_LED
Ethernet (orange)
IO48 (Half on - like when in the undefined state, neither high nor low).
No LEDs on the RS21 module are on.
Is there a way to check it any further, or is it on an express trip to the bin? I don’t see why it should have failed though, nothing changed for a month…
So here’s what you should do. Disconnect as much as possible from the board, and then connect it to a PC. Looking in Device Manager, what is showing up. In particular you’re looking for the .Net debuggable device. If that isn’t showing up, I’d try resetting it and going into bootloader doing the magic button press, then you should see the serial port show up.