Communication problems using MPR121

[mhusinsky]

hey there,

when trying to use an MPR121 (using the Adafruit Breakout Board) i failed using the code provided.
after some hours of debugging and comparing the code with the library provided by adafruit i found out that the culprit is the way I2C data is requested in I2Cdev.cpp

Changing this line:

i2cdevlib/Arduino/I2Cdev/I2Cdev.cpp

Line 236 in c08960d

Wire.endTransmission();

to

Wire.endTransmission(false);

makes it work though.

i'm not sure if this change has implications for other devices but it is necessary to make the MPR121 work.

[mhusinsky]

i forgot to mention that this happend to me on an ESP32 based board

[AshwiniCDAC]

Can you share your code here ? As the same setup is working for me for ESP32