Change the DevNonce when retrying a join. about dragino

[pjb304]

Yes, I see the issue, I'd not come across it because the application I'm using it in it joins once, and then caches the credentials, and that process is called manually. Another option with the existing code would be to create a new instance of the Dragino object (which would give it a new devNonce), but I agree that moving the dev nonce generation code into join makes sense. Although we seem to have differing line numbers.

[BNNorman]

line numbers yes - my mistake. I use gpsd to get the GPS info and cache the TPV reading with a timestamp so that calls to get_gps() don't block my main loop. The gps time reading is then corrected using the timestamp later.