- Mon Sep 14, 2015 11:44 pm
#184698
I'm overlooking something about MPR121 sensitivity. Working through the data sheet:
Running:
foo.writeRegister (0x5E, 0x00); //MPR121-Stop
foo.setThresholds (0, 2); //Maximum sensitivity
foo.cap.writeRegister (0x5E, 0XC5); //MPR121 start sensors 0-4 and Prox sensor
I would expect any capacitance change to trigger a touch. What does 0 mean in this context? Because I see in my debugging output the capacitance is varying 0-15% with NO touch condition indicated, or raw terms 0-19 cap. Stronger cap drop works fine, but I need the increased sensitivity. Do I need to turn off other features of the chip (filters, perhaps?)
Regards,
Ace
Running:
foo.writeRegister (0x5E, 0x00); //MPR121-Stop
foo.setThresholds (0, 2); //Maximum sensitivity
foo.cap.writeRegister (0x5E, 0XC5); //MPR121 start sensors 0-4 and Prox sensor
I would expect any capacitance change to trigger a touch. What does 0 mean in this context? Because I see in my debugging output the capacitance is varying 0-15% with NO touch condition indicated, or raw terms 0-19 cap. Stronger cap drop works fine, but I need the increased sensitivity. Do I need to turn off other features of the chip (filters, perhaps?)
Regards,
Ace