Ok so I tried your LoRaWAN library with latest firmware (2.1.15) and the change you described to me in another post for
lora.setReceiceWindowFirst(0, 868.1); (I’m only disabling duty cycles checking for testing like in your sketch) and that works pretty well (I have sent 70 128ms messages each 6min, so over 7hours before having to re-join).
For GPS, I took some ideas from your sketch, the one there https://github.com/toddkrein/OTAA-LoRaWAN-Seeed and adapted it to cayenne lpp.
For the uFL connector, it is for LoRa radio, Seeed confirmed that to me with a picture:
About 2.1.15 firmware, do you know if that leads to LoRaWAN 1.1 compatibility (did you test it)? Does that send these kind of packets out of the box? Is the device compatible with other LoRaWAN classes than initially?
Thanks for your help