The best photos from catalogues mpr121 hookup guide and travel groups for young adults
So if you set the touch threshold, or release threshold too low you may notice it trigger even a few inches away.
So if you are getting false or no positives, you may need to change that.
MPR121 Hookup Guide
Well… Capacitive sensing is pretty simple in concept.
I hope this was helpful in getting your MPR up and running with your Arduino, and if you have any questions, please use the discussion link.
Description: Code You may have noticed that SparkFun has example code for this sensor already — Actually, this code is slightly based off of theirs.