Connection issues with HRM Pro Plus and Marq 2 Adventurer (20.19)

Since I updated firmware to 20.19, I have problems connecting to my HRM Pro Plus. Before the update, watch was able to connect to HRM Pro Plus on my running activity. After the update, I did some runs without heart data recorded, so I realized I have to go to system settings -> sensors and try to search/connect to the sensor multiple times, till it manages to connect. However, once it connects, it seems to be working good, so I assume that the issue is on the initial search/connection. I tried replacing the battery on the sensor but this didn't fix the issue.

Is this a known issue or something is off with my HRM Pro Plus?

Top Replies

aleksiz 3 months ago +1 suggested

SW 20.23 solved the problem for me - HRM Pro connects automatically again

All Replies

0 5585266 3 months ago

I have the same issue on 20.16. Seems like an issue introduce on this version. :( the battery life has dropped significantly too. I went from 97% to 25% battery on a 6 and a half hours run.

0 George 3 months ago

I have this problem too. My HRM Pro Plus is a couple of years old now but until recently it would automatically connect every time without issue. Now it only seems to connect if I manually search for it. I've tried changing the battery and unpairing and re-pairing but to no effect.

BTW I have a similar problem with the Garmin Edge 840 so I'm not sure the problem is limited to the Marq. It may be that the ANT driver is the same on both though. Or that my HRM is getting old (like me).

0 3412587 3 months ago

Same issue here with Marq II Adventurer and brand new HRM Pro+.

Difficulties connecting with ANT, quicker to do with Bluetooth but then connection drops every few minutes whilst running

0 5585266 3 months ago in reply to 3412587

The latest version - 20.22, seems to fix these issues for me. Given this track record, I disabled automatic updates as I want to keep my watch working like it does now.

0 aleksiz 3 months ago

SW 20.23 solved the problem for me - HRM Pro connects automatically again