I experience something strange with 2 new MKRFOX1200 boards (actually, it could be any other board)
when I ground an Analogic Pin (I tried them all, on both boards), the returned value is about 18~20, then a "normal" value is supposed to be between 0~5. However, the reading seems to be correct for higher values (from 20 to 1023)
=> WTF ? Did somebody ever encounter that ?
Is it a normal tolerance that can be found (and that I never seen before) ?
Is this the sign that something is wrong ? that something is burned ? In that case, how to troubleshoot that ?
edit : A battery supplying leads to the same result (not a 50Hz artefact, or something like that)
Thanks for your answer.
Yes, the nominal value for a grounded pin is indeed generally between 3 and 7. The method to read a pin is clearly the one you've mentioned.
I read about 18 with that you propose. Enclosed results.
=> Actually, I assume a Hard issue. But I don't know how to reach it out, and how it was happen (2 boards simultaneously !)