Seeed Studio Grove - 12 Key Capacitive I2C Touch Sensor V2 (MPR121)

The Grove - 12 Key Capacitive I2C Touch Sensor V2 (MPR121) is a multichannel proximity capacitive touch sensor. It's a 3-in-1 module with the following features: Capacitance Sensing, Touch Sensing, and Proximity Sensing.

Features:

• 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