Uses https://github.com/BareConductive/mpr121 library to output electrode values in CSV or other delimited value format.

mpr121-csv.ino

#include <MPR121.h>
#include <Wire.h>

#define numElectrodes 12
#define DELIMITER ","

void setup() {
  Serial.begin( 9600 );
  Wire.begin();

  // Setup MPR121
  MPR121.begin( 0x5A );
  MPR121.setInterruptPin( 4 );
  MPR121.setTouchThreshold( 40 );
  MPR121.setReleaseThreshold( 20 );
}

void loop() {
  // Check for new data
  MPR121.updateTouchData();

  // Loop through all electrodes
  for ( int i = 0; i < numElectrodes; i++ ) {

    // Print current touch status of electrode
    Serial.print( MPR121.getTouchData( i ) );

    // Print delimiter between each value
    if ( ( i + 1 ) < numElectrodes ) {
      Serial.print( DELIMITER );
    }
  }

  // Print new line at after all values output
  Serial.println();
}