Hello bruno, this is what I did, instead of using the exemple code, I can set and catch the timeout error hence loop while not joint. while lora.has_joined() is not True: try: lora.join(activation=LoRa.OTAA, auth=(dev_eui, app_eui, app_key), timeout=20000, dr=0) except Exception as e: print('Not joined yet...')

@berni I would like to add my name to the list of people having the same problem with join issues. Incidentally I have another Node using an Arduino LoRaWan shield on the same nano gateway that joins successfully every time so I would tend to exclude noise issues with the Pycom OTAA / Nano Gateway example. It looks like software or firmware issues in the node to me. Hope this helps.