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Broadcast HR all over the place

I use the Broadcast HR function on a static bike for zwift (it broadcasts ANT+ to a dongle in my computer). This worked fine before the software update, but since the data has been really poor. See these two activities - identical workouts, identical setup:

Before: connect.garmin.com/.../3948696721

After: connect.garmin.com/.../3972924243

Is anyone else using this functionality in this way? Any tips to make it work as it used to, or are you also seeing the same problems?

Grateful for any suggestions...

0 Teriemer over 5 years ago

Can't see your links due to privacy settings...

0 gmorrison100 over 5 years ago in reply to Teriemer

Apologies - should be fixed now. The gap in HR recorded during the second activity was a result of me stopping the broadcast function and restarting, in an attempt to kick it into life. Sadly no joy. It's still a mess - see again from this morning...

connect.garmin.com/.../3997730111

0 gmorrison100 over 5 years ago

Same again this morning - a promising start but then hopeless...

connect.garmin.com/.../4004567469

0 gmorrison100 over 5 years ago

Same again this morning - a promising start but then hopeless...

connect.garmin.com/.../4004567469

0 gmorrison100 over 5 years ago

connect.garmin.com/.../4015125920

This morning I could see immediately that the issue was there (as expected) so assumed I would have nothing to lose by stopping the HR broadcast and restarting it. The really odd thing is that the ERG mode instructions from Zwift also stopped (see the power trace which should have been ramping up) until I restarted the HR broadcast on the 945. Looking more closely at other activities I can see spikes and bumps in the HR trace at around the times that the ERG mode steps up/down but it could be a coincidence.

What is going on!? Is there some sort of interference happening? Surely the watch reading my HR and broadcasting it is totally independent from Zwift's instructions to my KICKR trainer?