AT+UART=TIMEOUT, 1000
AT+MODE=TEST
AT+TEST=RFCFG,903.3,SF12,125,12,15,14,ON,OFF,OFF
These commands will configure the AT command to support a 1 second timeout (handy if enter commands by hand, unnecessary otherwise).
+MODE will put it into TEST mode
+TEST=RFCFG… will set communication parameters. PLEASE REVIEW THE FREQUENCY USED FOR YOUR REGION. I am in North America, and chose 903.3 for the test.
Perform these same steps on 2 units (Lorae-E5 Mini, or Dev board).
Then, use this command on the Receiver:
AT+TEST=RXLRPKT
And this command on the Transmitter:
AT+TEST=TXLRSTR,"Hello World!"
You should receive a response like this on the Receiver:
+TEST: LEN:12, RSSI:-18, SNR:5
+TEST: RX "48656C6C6F20576F726C6421"
The received data is hex encoded.