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Replying to @bateskecom and @MicrochipMakes

Basically each row & column is tied together; then using Adafruit’s FreeTouch library, it can be as simple as scanning through each row and column (using touchio for CircuitPython, or FreeTouch in Arduino). For SAMD21, you have to make sure that the pins are PTC Y-channels. (1/2)

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