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MPR121 Proximity Detection

Question asked by Andrea Vial on Nov 12, 2019

Hi all,

I'm new here in the forum.

 

With Arduino I'm trying to get the proximity work on a large conductivity panel (about 1meters x 2meters) using a MPR121 equipped board:

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

 

Following this application note A3893.

I set the register for area detection (0x5E) and I read the baseline and datas from registers (0x1C, 0x1B, 0x2A).

But I'm not able to get stable data from the 13th pseudo electrode, the values are very fluctuating and inconsistent.

 

Where I'm wrong? There are another register settings to do?

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