Using moitessier hat and GPIO

[Ranur]

Have you tried without the mpu connected? Maybe it is doing something to the voltages of the esp.

Dunno - that was one of my potential guesses. 
*heating up the iron*

Edit 1:
Removed the 3,3V and the interupt and reflashed it with "blink" and then SigKSens again and tried. Old configs still present. Flashed another wifi sketch onto the d1 mini - then back to SigkSens and voila - after some hassle getting connected to "Unconfigured Sensor",it's now configured. At least without the 9250.

Let's get it configured and get the good ol' iron back out!


Edit 2:
Config first - then solder. MPU 9250 is now up and running. :-)