Datasheet

ADDR tied to 3V: 0x5B

ADDR tied to SDA: 0x5C

ADDR tied to SCL: 0x5D

We suggest sticking with the default for the test demo, you can always change it later.

Download Adafruit_MPR121

To begin reading sensor data, you will need to download Adafruit_MPR121_Library from our

github repository (http://adafru.it/dKE). You can do that by visiting the github repo and

manually downloading or, easier, just click this button to download the zip

Download Adafruit_MPR121

http://adafru.it/dKF

Rename the uncompressed folder Adafruit_MPR121 and check that the

Adafruit_MPR121 folder contains Adafruit_MPR121.cpp and Adafruit_MPR121.h

Place the Adafruit_MPR121 library folder your arduinosketchfolder/libraries/ folder.

You may need to create the libraries subfolder if its your first library. Restart the IDE.

We also have a great tutorial on Arduino library installation at:

http://learn.adafruit.com/adafruit-all-about-arduino-libraries-install-use (http://adafru.it/aYM)

Load Demo

Open up File->Examples->Adafruit_MPR121->MPR121test and upload to your

Arduino wired up to the sensor

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

sensor-breakout-tutorial

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