Datasheet

That's all there is to using the MPR121 module with CircuitPython!

# Call touched to get a 12-bit value with the state of each MPR121 input.

touch = mpr121.touched()

# Test if exactly bit 0 and 11 are set to 1, i.e. input 0 and 11 are touched.

if touch == 0b100000000001:

print('Input 0 and 11 touched!')

# Or test if either bit 0 or 11 are set to 1, i.e. input 0 or 11 are touched:

if touch & 0b100000000000 > 0 or touch & 0b000000000001 > 0:

print('Input 0 or 11 touched!')

https://learn.adafruit.com/adafruit-mpr121-12-key-capacitive-touch-sensor-breakout-

tutorial

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