Suunto Vertical 2 – Bluetooth issues: connection loss after a few minutes and/or after stops”
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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…
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It seems that suunto is not really interested in solving the problem I was in contact with the support several times and reported the problem and sent the logs but now they closed the ticket without any information
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@manno02 said in Suunto Vertical 2 – Bluetooth issues: connection loss after a few minutes and/or after stops”:
It seems that suunto is not really interested in solving the problem I was in contact with the support several times and reported the problem and sent the logs but now they closed the ticket without any information
You always get a “we close the issue due to inactivity “ mail. It is beyond comprehension how stupid this mail is. Apart from complaining about bugs, I also complain about that mail.
Then you get a reply like “that is an automatically generated mail and we cannot do anything about it” Then I explain they are Suunto, Suunto sends the mail so they are the ones that can do something about it.
If everything is how it should work, a support engineer should have made a new ticket for the development team and the ticket that is closed is only the support ticket. But like I said, if everything is how it should work.
I asked some follow up questions about the bluetooth connection issues, but haven’t heard since…
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At least the support sent a reaction:
„The frequent disconnections and reconnections are occurring on the BLE firmware (Bluetooth) side.
It is worth noting that the longest disconnection period of the heart rate belt was approximately three minutes, after which it successfully reconnected. Therefore, the issue is not an inability to reconnect, but rather frequent disconnecting and reconnecting.
Based on the current analysis, the issue appears to be related to the connection stability between the BLE firmware and the sensor.
However, the current logs do not provide enough evidence for us to draw a definitive conclusion. In order to further diagnose the issue, we need to attempt to reproduce the problem. Therefore, we will now escalate this matter to our testing team for reproduction.“
We will see …
