ANT Forum

In section 4.3 of the ANT Speed/Cadence device profile, it says to add 256 to the accumulated value if there is a rollover in the event time. But the event time is 2 bytes, or 16 bits. So shouldn't the value to add be 2^16 rather than 2^8?

I made a simple excel spreadsheet to test the rollover increment, and that confirms it should be 2^16. 2^8 would make sense if only the event time LSB is being used and the MSB is being ignored.

Am I missing something here?      

I believe you are referring to Section 4.5.2 in the ANT+ Bike Speed and Cadence Device Profile Rev 2.0.

You are correct, the profile says to add 256 to the accumulated value where as the rollover value of that field (2^16 in the case of Bike Speed Event Time) should be added instead.

We have made a note of this discrepancy. Thank you.