Hello,
I have a problem with using RFID reader (Serial) and Capacitive sensors (Capsense library) at the same time.
Sometimes ( about 5% of the cases), when a RFID tag is read, the value of one or several capacitive sensors change.
I wonder what causes this problem and how to solve it? Does anyone have any idea?
Thanks a lot.
The cap sense technique used is not a very reliable nor repeatable technique and will be very sensitive to external interference so your troubles come as no supprise.
As to a cure, the usual decoupling, and physical separation will help.
Thanks for your answer. I also noticed that the value from capacitive sensor varies with different power sources.
As it is not a solid technique in the way it is implemented all sorts of thing will alter it.