At step C.4: I don't use gateways so I guess it should use one community TTN gateway near me, but I don't know the LoRaWAN version nor the regional parameters version. I put the recommended frequency plan, and LoRaWAN specification 1.0.0. I entered the right Dev EUI, I didn’t have any App EUI so I filled it with 0s, and generated an app key.
At step C.6, I can’t see data from my sensors as I am supposed to.
Yesterday I had no problem and I made it work, but now I don't see anything but "LoRa Join Failed hence suspended the task" in the XDK worbench console.