I use Arduino IDE on MAC M1. I Purchased a few RAK3172S modules for development and
verification. They are flashed and powered using a standard UART/USB connector.
When delivered they all have SDK3.53 on board and I can use AT commands to JOIN the boards.
I install the most-recent RAK3172 SDK 4.0.1 via IDE board manager and flash the original RAK OTAA example but randomizing the Keys. Now I get an error on the devices.
After 5 seconds the JOIN terminated with +EVT:JOIN_FAILED_TX_TIMEOUT while it should terminate
with JOIN_FAILED_RX_TIMEOUT after 10…15 seconds. Also, I don’t see any packets on the LORA
gateway anymore. Hard reset does not have any impact. I also tried to power the device with
an extra battery to eliminate the impact of UART Power supply - no success.
I am out of options and need your help. What causes this error message ?