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[LTE] adds 1 retry for UDP/TCP socket send in case of error [ch18789] #1576
LTE socket send AT commands in Binary mode are being interrupted with data being received, which causes the send to error. This subsequently causes a handshake error immediately. This has been identified as an issue with the u-blox SARA-R410M-02B at this time only and does not seem to affect SARA-U260/U270/G350 modems.
The only work around currently is to detect socket send errors and retry the send 1 time.
Steps to Test
Invalidating the device key and allowing it to handshake over and over again allows for many opportunities to observe errors that are resolved by a retry.