@mlindholm I appreciate your posting this, but I'm unable to make it work. First off:

I2CMS.begin() is not actually a thing? Unless you're importing I2CMS from somewhere I'm not aware of?

I've tried with

#define I2C_SDA 8 // pin 8
#define I2C_SCL 7 // pin 7

setup(){
  Wire.begin(I2C_SDA, I2C_SCL);
}

But I'm still unable to read from the I2C device. I've got other stuff working on the board (like a fan-control, and a water pump) but I2C and Servos are steadfastly refusing to function.

Ideas?

dg