Spent some time this evening looking at the response from the Uconnect module.

The module responds at various times with ID's

43F#

2D0#

2D7#

282#

3A6#

doing a quick comparison between starting up the uconect with a phone nearby with Bluetooth on and off indicated that 2D0 correlated to a bluetooth connection.

Upon a bluetooth connection the Uconnect transmits

2D0#F0E022FF01
2D0#F0E022F301
2D0#F0E022F301

2D0#F1E022F301
2D0#E1E022F301
2D0#E1E022F301

the E1E022F301 is repeated every second.

Interestingly the 3rd Byte in this case 22 appears to represent the mobile phone signal strength

21  == 1 Bar

22 == 2 Bar

23 == 3 Bar

I was not able to verify but suspect 24 would be 4 bars

I did notice a couple of occasions of 2F and that  was after wrapping the phone in aluminum foil - I suspect this indicates no signal.

I could not determine any indication of battery level but I only had a 10% variation on the phone during the time I had to test so perhaps the battery level reported by the Uconnect is to granular to show up in my short test.