Hitting the same issue this side. When using the LoRa-E5 as a radio module, one would expect to switch it off when it is not in use to save battery power.
I did this experiment:
- Power up module
- Config keys, OTAA, EU868
- Join
- Send message
- AT+LOWPOWER
- remove power
- Power back on
- AT
- AT+MSG=HELLO
Response is:
+MSG: Please join network first␍␊