MPR121 Proximity Detection

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MPR121 Proximity Detection

Contributor I

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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Contributor I

Hello. First of all, If the panel grows, the noise will also grow. And if the integrated power of a panel of that size is not enough.
Assuming that these two problems do not exist, for the filter;
Use the bubble sort method inside the Arduino program. It really works.

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