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forerunner 955 and polar oh1

2445723
3 days ago

Hello everyone

I have a question regarding the combination of a Forerunner R955 and a Polar OH1 armband heart rate monitor.

1   

When I use the Polar on my arm, I see the green LED on the Polar,

but I also see the green LEDs on the Garmin.

On the Forerunner, I see the Polar connected.

Is it correct for the Garmin LED to light up


when the Polar OH1 is connected?

2 

 when I remove the Forerunner from my wrist, my heart rate disappears.

I bought the Polar armband for cycling


with the Forerunner mounted on the handlebars. I can't use it like that.

3

Does the Polar OH1 only work when a training session is active, running, cycling, etc.?


I see that if a training session isn't active, the heart rate on the Forerunner isn't visible.

How can I fix this problem?

Best regards

  • 0 2 days ago

    - External HR sensors like your Polar OH1 are only active (connected):

    -- during timed activities

    -- when certain apps/glances are opened (like Health Snapshot, the Heart Rate glance, etc)

    In either case you will see a notification that the external HR strap is connected.

    There is no way to have an external HR strap continuously connected (e.g. 24/7) unless you keep an app or activity that uses HR open all the time, which will ofc drain battery very quickly and interfere with normal operation of the watch

    - The likely reason the watch HR LEDs still light up when an external HR sensor is connected (during an activity) is because of a new-ish feature called "dynamic source switching", which is enabled by default. The way this works is that with supported Garmin straps, the watch will try to detect when the data from the strap is bad and dynamically switch to the wrist HR. Even though this shouldn't be supported for your Polar OH1, I've found that with all external HR sensors, the watch records both the wrist HR and the external HR when dynamic source switching is enabled

    NOTE: this is not the same as the basic behaviour where the watch will switch to optical wrist HR when the connection with the external HR is lost. This is old behaviour and should work with all external HR sensors (Garmin or otherwise). With dynamic source switching, when Garmin determines the data quality from the external HR is bad, it decides to switch over to wrist HR, even though the external HR remains connected

    - Another possible reason for the LEDs to stay green is if you have Garmin Pay enabled. The watch uses wrist optical HR to detect whether the watch is on your wrist. That way it can prompt you to re-enter your Garmin Pay passcode if the watch leaves your wrist at some point

    - "when I remove the Forerunner from my wrist, my heart rate disappears."

    I can't explain this. If your Polar strap is connected, it should take precedence over wrist HR, especially if wrist HR is no longer available (because you took off the watch)