Issue: LoRa join credentials are not retained for RAK4200 EU433 modules running firmware version 3.3.0.14 when the RAK4200 module is put into low power mode.
Setup: Six data loggers equipped with RAK4200 EU433 modules. Two of the RAK4200 modules are running 3.2.0.15 firmware, and four are running 3.3.0.14 firmware.
Server: N.A.
Details: We have six data loggers equipped with RAK4200 EU433 modules. Two of these modules are running firmware version 3.2.0.15. The other 4 are running firmware version 3.3.0.14. The 2 modules running firmware version 3.2.0.15 can be put into low power mode, and will retain their LoRa join credentials, however the 4 running firmware version 3.3.0.14 do not retain their join credentials after they have been put in low power mode, so that it is necessary to re-join the gateway after they have been put back to regular power mode. Is there a list somewhere of the firmware differences between 3.2.0.15 and 3.3.0.14? On the RAK4200 Firmware page (index - powered by h5ai v0.30.0 (https://larsjung.de/h5ai/)) it looks like the most recent version is 3.2.0.15. It is possible that there is some other logger hardware difference that is responsible for the join credentials being lost in low power mode, and the firmware correlation is just a coincidence, but I was curious to see what any firmware revision notes had to say. Thank you!