ANT Forum

I'm curious as to what head units support what power profiles. There are 4 power profiles I believe in the latest revision. Crank torque, hub torque, basic, and crank frequency (which I believe is for power meters similar to the polar chain vibration sensor).

It seems that only the basic power profile supports L/R percentage.

I'm trying to determine if any head units actually read the crank torque or hub torque profiles, or is everything working with the basic profile?

Has anyone tested any head units?      

Well I was impatient and picked up a Garmin Edge 500 and updated to firmware 3.00. If a power meter is transmitting crank torque, it calculates power based on cadence and torque ignoring the basic power pages except for the L/R power balance (as it's the only page that has power balance).

When the Right pedal is enabled you get a split (EG 47%-53%), but if it is left 0 then it will just read the value sent (EG 53%).

When sending only the basic profile it will read all data from the basic power page.

If on the fly (using the sensor simulator) you change profiles such as basic to crank torque or vice versa, it will stick with whatever it first detects. EG: if you started on crank torque pages then switch to basic, it will not read any power but only an L/R balance.

Haven't played with the hub torque profile.      

If the head unit supports more than basic power then it needs to support all the formats to be compliant with the spec and pass certification.

Your observation on changing the format in the simulator is the same as you would get with my Android app IpBike. Real devices don't change format mid session like you can with the simulator and coding for it makes things more complex. IpBike will detect basic power and transmit that but once it sees a none basic power format it ignores all future basic power messages and only use the more detailed format.