Hi,

I have looked in forum about this problem, but I didn't find anybody to talk about this. I have upload simple sketch to read values from A0, and I only get values range from 685 (about 685) to 1023. I am not sure why I can't get value 0. 

I tried the same sketch and the same connections with arduino Uno R3 instead of Simatic IoT and I get full range of values (0 to 1023). I don't use any extension modules. Hope, somebody knows the reason. Tnx

Closed cause question posted twice.

The second thread with the subject Analog Inputs - read with Node-red is published within the conference IOT2020 / IOT2040.