Hello, as a radio amateur operator I have the following request for these modules in the firmware:
SparkFun LSM9DS1
SparkFun SAM-M8Q GPS Breakout
They both communicates with a I2C bus.
Why I think that these are useful.
Those will permit the rotator controller to know where it is located, where North is and where the antennas is pointing according to elevation and azimuth.
That is something that is very useful for someone who operates radio amateur sattelites from different locations.