Maxime

Of course, sorry for not including initially. Pretty vanilla. The board I am using now is Esprsesif ESP32-WROOM-32D. I think this one's a bit older I could try with another...

So I tried another ESP32 (have alot), it was one of the older DEVKITv1 which fits the wider headers. I aligned the 3v headers to the top left corner but...

The one that cooked up was the earlier devkit v1 model with 15 pins on each side, while the 3V pin was aligned with the board, perhaps something else downstream...

After a few reboots there are some readings coming through but they are pretty wild. The load on the test bench is a standard incandescent 75W bulb > > [17:41:48][D][sensor:127]:...

Yes the device was powered by the AC transformer.