I’ve the following Setup:
I’ve read the Topics about reading analog values, but they don’t answer my question.
If I attach termistors to the shown 2.5mm audio jacks the readings I get are valid. The question I have is how to detect that no thermistor is attached.
I get readings arround 800 on Inputs A0 - A3 when no thermistors are connected. I tried reading from the analog Inputs without anything connected (empty spark) and get readings arround 2000. Shouldn’t I get zero?
Thanks for some advice.