mpr121 does not work with MEGA

Development Boards Arduino
1

Hey all,nice to join the forum.

Having an issue with an mpr121 touch sensor and hope you ould assist.

ive followed the sketch here https://cdn.sparkfun.com/r/600-600/asse … 8b4567.jpg

when the mpr121 is connected to Arduino UNO everything works

However - when the mpr121 is connected to Arduino MEGA it does not work - tried it with 2 different MEGA

any ideas what could go wrong ?

2

The Mega has the SDA and SCL signals on different pins. They are on 20 (SDA) and 21 (SCL). See https://www.arduino.cc/en/Main/ArduinoBoardMega2560 in the Input and Output section.

3

tnx ! now it works