One of my LoRa modules stopped working recently. While debugging the problem via the AT interface, I found that the module had forgotten all of its settings:
AT$NWKSKEY? $NWKSKEY: OK AT$APPSKEY? $APPSKEY: OK AT$DEVEUI? $DEVEUI: OK
So, I tried to restore the settings and in the AT command interface it looked like that might have worked:
AT$DEVADDR=26015936 OK AT$DEVADDR? $DEVADDR: 26015936 OK
However, upon resetting the device, all the settings are gone again:
Has anybody seen this before? Any idea what could be causing the problem? Thank you.