@nr12 said in Support for I2C during Tool Changing:
@dc42
Hey, thanks for getting back, There was an M107 in the gcode file, which the slicer added and it disabled all the fan ports. one of these fan ports was powering the Arduino.
M107 should only disable the fan assigned as the print cooling fan, which is Fan 0 unless you specify different fans in your M563 tool definition commands.