drvii

Thanks for the inspiration. I was able to do the same, except removing the 588L chip. I chose to cut the SDL line coming from pin16. This way I can always solder the connection again if I need to use it in the future. After cutting it, I was able to uncomment #define MPU6050_I2C_AUX_MASTER Then I plugged in the external compass of my GPS (with integrated compass) into the same I2C port you used and it worked. Only problem was the GPS had the mag chip on the other side (upside down)... so I now have my gps antenna pointing down. I'll see about changing the code to invert it if its even possible.