After hours of searching, I have not been able to find how to get the Adafruit MPR121 sensor shield for the Arduino Uno to detect proximity. I believe there is a way to enable this, but cannot figure it out.
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This documentation says that it has proximity detection: http://cache.freescale.com/files/sensors/doc/app_note/AN3893.pdf
I just cannot figure out how it needs to be done.
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Yes, I have read it, and it says that you can enable a proximity detection mode "by configuring the Electrode Configuration Register (0x5E)" but it does not say how/where to do this.
I am looking for any distance right now, as long as there is no physical contact between the touch and the shield.