Datasheet

Then reupload. Open up the serial console again - you'll see way more text
Each reading has 12 columns. One for each sensor, #0 to #11. There's two rows, one for
the 'baseline' and one for the current filtered data reading. When the current reading is within
about 12 counts of the baseline, that's considered untouched. When the reading is more
than 12 counts smaller than the baseline, the chip reports a touch.
Most people don't need raw data too much, but it can be handy if doing intense debugging.
It can be helpful if you are tweaking your sensors to get good responsivity.
Library Reference
Since the sensors use I2C, there's no pins to be defined during instantiation. You can just
use:
Adafruit_MPR121 cap = Adafruit_MPR121();
When you initialize the sensor, pass in the I2C address. It can range from 0x5A (default) to
// comment out this line for detailed data from the sensor!
return;
© Adafruit Industries
https://learn.adafruit.com/adafruit-mpr121-12-key-capacitive-touch-
sensor-breakout-tutorial
Page 16 of 20