The Grove – 12 Key Capacitive I2C Touch Sensor V3 (MPR121) is a multi-channel proximity capacitive touch sensor. It’s a 3-in-1 module with the following features: Capacitance Sensing. Tough Sensing.
- Internal 10-bit ADC
- Integrated independent autocalibration for each electrode input
- Completely independent electrodes with built-in autoconfiguration
- I2C interface, with IRQ, Interrupt output to advise electrode status changes
- Hardware configurable I2C address
- 12 electrodes/capacitance sensing inputs in which 8 are multifunctional for LED driving and GPIO
- Autoconfiguration of charge current and charge time for each electrode input
- Separate touch and release trip thresholds for each electrode, providing hysteresis and electrode independence
- Add two more GND pin and expand the gap of pins for safe handling
More information:
https://www.seeedstudio.com/Grove-12-Key-Capacitive-I2C-Touch-Sensor-V3-MPR121-p-4694.html