Every time I upload the example sketch LMIC-Arduino / ttn-otaa to the Lora32u4 V1.3 board, the connection on the USB port is lost after upload. Only after many attempts to upload a simple sketch such as Blynk (frequently press the reset button during upload) will “reset” the board and reconnect the port. Thereafter things went well until the next upload
I use the latest version of Arduino IDE and chose the Adafruit Feather 32u4 as a board. On this forum I have read several (old) messages about this problem, but no solution that works for me. The ttn-otaa example sketch does not use a sleep function so this cannot be the cause of this issue.
As suggested on several fora I have soldered a wirebridge between pin DIO1 and pin 6.
Is it better to throw this board away or does someone have a solution?