ANT Forum

Hi,
I am looking for some suggestions on how to handle the case of sending data from an Heart Rate sensor that updates BPM data once per second. HRM profile requires to send 4 packets per second, and also has some requirements on the timestamp and HB count fields. The problem in my case is that more than 1 beat may happen when BPM > 60, but I only get a "per second" update of an averaged value (BPM) and no info on the time when the multiple beats have happened. What's the suggested way to handle this situation?
Thanks!      

Hi MB,

Most HR displays sample at 4 Hz, but use the raw information provided over the ANT+ HRM channel to compute an instantaneous (and not averaged) beats-per-minute (bpm) data point (Think tangent of a line, and not a line of best fit).

This bpm is updated once per heart beat. For the average person, that's about once per second. If you're exercising, that multiple times a second.

The ANT+ HRM profile also exposes the timestamp of the heart beat event.

Which API are you using?

Regards,
BK