We are using the RAK3172 module (fw version v1.0.4_20220218) in our agrotech solution.
The module runs in the LoRaWAN mode.
What we are seeing is after a certain number of days in the field, the RAK3172 module freezes and hangs up. We can observe on a logic analyzer the host MCU (nRF52840) send the AT commands to the RAK3172 module. But we don’t see any response from the RAK module.
In order to get the RAK module back and working, we have to power cycle the whole device.
Is there any known condition or issue that can put the RAK module in this state? Is there any workaround for this problem if it is a known problem?