This post was going to be about how to the use my RAK4200LoRaWAN-NetNF library with a RAK3205 WisBlock Wifi Interface Module and RAK4200 Evaluation Board but there was a problem…

When I ran the RAK4200LoRaWANDeviceClient the first couple of join attempts failed which was odd as my sparkfun ESP32 thing plus with RAK4200 Breakout Board setup was very reliable.

When I looked at The Things Network “Live data” tab the RAK4200 Module on the RAK4200 Evaluation Board wasn’t using the LoRaWAN AS923 Join-Request channels 923.20 & 923.40 MHz.

The RAK4200 Module on the appeared to be cycling through all the AS923 channels and every so often would use one the join request channels.

The RAK4200 Breakout Board module is running a later firmware version (V3.2.0.16) than the RAK4200 Evaluation Board module (V3.2.0.15) which is most probably the problem.

The RAK811 module (which has been retired) also had similar issues with AS923.