Suunto Vertical 2 – Bluetooth issues: connection loss after a few minutes and/or after stops”
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@manno02 wait, the Suunto HR belt has only one Bluetooth channel, so it can only connect to one device at the time
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I know these dropouts since November 2025, as I updated to 2.48.16… for me, the Suunto HR belt is useless since that time… it began on SV1 with 2.28.26, but it’s also present on my SV2 wich I bought 01/26… I posted this problem several times here in the Forum… But actually I doubt that someone is concerning about this problem
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Yes that’s true and that’s why I shiftet to other HR from COROS and Polar.
But if I select the suunto belt on the watch before a workout, the watch should keep catching the signals of the selected sensor
It seems to me that the sv2 has a problem with handling the signal and priorizing
As I said it worked very fine without the suunto belt and with different other HRs before the update tragedy that startet in Novemwr when the watch got trouble on IOs machines. But that is another point -
Hello everyone, same problem here (again) because a while ago Suunto’s technical service replaced my Suunto belt due to the same connection problems, after approximately 6 months of use of the Suunto band.
Tomorrow I will completely disconnect the band, install a new battery (after resetting the Suunto band) and then test it again with activity.
I’ve also considered that it might be possible using “Sports Mode Customization” after the last update a few days ago…it’s a shame and quite strange because.
Today I even started experiencing watch restarts when I unpaired the power meter from the bike, as I was ruling out sensors. After a 55-minute activity, it started disconnecting again approximately every 2 minutes.
I’ve attached images showing the clock reset and error message, in case it provides any useful information.
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@Elmiuel how long has passed from the crash? Can you send logs?
Edit: I see it was yesterday, not sure anything can be done now
Watch: Suunto Vertical 2 Titanium Black
Blog: isazi's home
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@isazi
Hi Isazi. I’m going to try changing the battery to 2025 and resetting the Smart Heart 30". I don’t think that will be the problem “I hope I’m wrong”. I’ll also try with an external band from COOSPO brand with my watch and the watch’s native sport mode.
Today, April 10th at 5:01 PM, I sent a registration to Suunto… Update of both the App and Vertical Clock 2 to the latest public versions.
If I don’t resolve this issue by Monday, I will send my Suunto Smart Belt Heart external chest strap, which is still under warranty, to the technical service… -
Hi everyone. So, I did a test with two different types of external heart rate monitors: the usual Smart Band Heart Belt and a supposedly inferior brand called “Coospo.” It was disappointing. I even recorded an activity that didn’t require GPS (dancing) for the test…
Using the Suunto strap, after a few moments…
Now with an external one, Coospo brand…
In my case, it’s clear: my original headband, after being serviced and replaced (theoretically) with a new one, has stopped working again after 7 months. I’ve tried hardly washing it… only by hand. I’ll send it to the repair shop tomorrow, as it still has a year of warranty left. After that, I’ll sell it in case anyone wants to continue the crusade
. I’m going back to the Polar H10… -
It keeps on yesterday I mad a longer trip after the first break the signal got lost and didn’t come back
This time just the vertical 2 and the suunto HR
It sucks
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@manno02 I can get the signal back disconnecting and reconnecting the HR sensor, I know that is far from being ideal but at least is a workaround
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In my screenshot above the area when the sensor is disconnected is flat lined, as other commented, I would prefer to have no data.
Possibly it’s a limit of how data is represented having to link two values?
I had another occurrence of this bug today and is always the same behaviour.
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I asked Suunto for a hardware service on the watch but until now no response I will wait for it because I don’t want to change to the competitors
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The watch and phone are connected via Bluetooth, and I’m receiving notifications, but the app shows no connection. I turned Bluetooth off and on on the phone, but it didn’t fix the problem. What else can I do?
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Bluetooth connection to Garmin HRM crashed after few minutes. Logs sent 28.04.2026 21:44.
It’s so frustrating, that bug present few FW ago is boiling my blood again. -
Just reported to Suunto suport by email similar issue between Suunto Run and Suunto Chest Strap. Changing to Duracell 2025 3V batteries didn’t helped.
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I also reported the issue (race s with polar oh1+ in my case). Got the usual blah blah reply (restart your watch, delete the connected device and repair again)
I suggested they first look into their software and pointed to various threads on their forum about the subject.
Strangely only the heart rate sensor lost connection. My stryd kept working during my athletics training.
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@elbee got that answer to… Did the reset just to be sure… Got disconnections on the training immediately after…
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Hi, I experienced this today too. I just sent data to Suunto (17:36 on 05/30/26). I was using custom activity tracking, live tracking, route tracking, and an external Polar H10 heart rate monitor (new; my Wahoo cycling computer picks it up very quickly at a distance of 15-20 meters). Anyway, that’s what happens when sensor limitations are affected by the system.
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@Elmiuel today besides the disconnections I noticed the HR is completely out of sync.
This issues seems to happen on several Suunto models
Suunto Run + Suunto Chest Strap
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the same issue here on vertical. on top of disconnecting hr belt (polar h10) watch connected silently to my daughter hr belt (also h10) I was using previously and is not paired to my watch anymore. logs sent
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@dombo wow, that’s impressive…
