Garmin Cycling - Did you know you can customize the data fields on your Edge to show things like data from your Di2 shifters? Let us know your “can't ride without it”
Garmin Edge 1040 Problem with DI2 12speed datafield : r/bicycling
13 clever things you didn't know your Garmin could do | Cycling Weekly
Garmin and Shimano Di2 can now control bike lights - BikeRadar