Hi Paul,
This is an interesting report.
I still haven’t been able to explain what happened to my STM32 processor board, only that it seems that the Ethernet function board didn’t cause the problem.
I also have the LORA and ESP32 function board, and while I haven’t done any work with them, I did install those function boards on the Double and power them up in the past. Maybe that’s when the STM processor board was damaged.
I also don’t want to risk damaging these processor boards with troubleshoot experiments without some assurances from SFE that they will replace them in the event we can reproduce the problem.