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    Suunto Smart Heart Rate Belt keeps losing connection to the watch

    Scheduled Pinned Locked Moved Suunto Race S
    43 Posts 19 Posters 4.4k Views 19 Watching
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    • S Offline
      sindavide @elbee
      last edited by

      @elbee
      Could the watch firmware. I never had any issues before the last update.
      By the way, i got a new suunto smart sensor, and it occasionally dosconnecta - the watch does not show hr - albeit for not long

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      • C Offline
        Calando @Marcelo Mönch
        last edited by

        @Marcelo-Mönch Does this work with the Suunto ZoneSense? I think that ZoneSense requires a chest strap since it needs HRV data which cannot be provided reliably from an OHR !?

        Marcelo MönchM 1 Reply Last reply Reply Quote 0
        • Marcelo MönchM Offline
          Marcelo Mönch @Calando
          last edited by

          @Calando Why is a chest strap necessary? Beat-by-beat data: ZoneSense uses a proprietary physiological algorithm (DDFA) that analyzes Heart Rate Variability (HRV) to determine stress and intensity levels.
          Optical limitations: Optical sensors (OHR) cannot reliably measure RR intervals (the exact time between heartbeats) while you are in motion. They are only accurate for this metric when you are at complete rest, such as during sleep.
          When pairing a chest strap, your watch will automatically disable the optical wrist monitor to ensure the data source provides the necessary accuracy for functionality.

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          • 2 Offline
            2b2bff Gold Members @Marcelo Mönch
            last edited by

            @Marcelo-Mönch said:

            When pairing a chest strap, your watch will automatically disable the optical wrist monitor to ensure the data source provides the necessary accuracy for functionality.

            It will disable the optical sensor of the watch, but not for the reasons you stated. Suunto just can’t work with multiple sources. On the plus side the disabled sensor will save you a bit of battery…

            Suunto Race S
            Garmin Epix Pro

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            • S Offline
              Sixeela29
              last edited by

              Ça va faire un an que j’ai ce problème là.
              Ça a commencé avec ma ceinture Polar H9.
              Suite à ça j’ai pris une ceinture Suunto neuve et même problème. Je suis très déçu que Suunto n’est jamais résolu le problème …

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              • Ecki D.E Offline
                Ecki D. Bronze Member
                last edited by

                Same here with the 9PP after the last firmware update. Since then it happens regularly and as it isn’t reliable anymore I stopped using it regularly.
                Anyone tried to go back to another earlier FW?

                https://www.strava.com/athletes/37982563
                https://www.instagram.com/macdev

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                • Kevin MajorK Offline
                  Kevin Major
                  last edited by

                  Is there any movement on this issue, or is Suunto just sweeping it under the rug?

                  I went on a 5 hour bike ride today, and the first 30 minutes of my heart rate was measured. Upon completion of the ride, none of the data was synced.

                  The battery was replaced two weeks ago and still reports 100%, the old battery reported 80%, but after ongoing problems I changed it to eliminate a variable.

                  The fact that there is no way to force a reconnection to a bluetooth device during an activity is a serious problem. The same thing happened with my favero power meter pedals. I stopped for 20 minutes, the bluetooth turned off, and I couldn’t reconnect it. Thankfully I am able to change the sleep setting for the pedals and haven’t had an issue with them since.

                  I know this is the Race S board, but I’m on the Ocean and having the exact same issue.

                  Ocean 2.51.28

                  E S 2 Replies Last reply Reply Quote 0
                  • Kevin MajorK Kevin Major referenced this topic
                  • E Online
                    elbee @Kevin Major
                    last edited by

                    @Kevin-Major

                    Suunto support told me not to expect a firmware update with a fix very soon.

                    And personally I don’t think it will be ever be solved. From the conversations I had with suunto support I don’t get the impression they are actually working it.

                    Suunto t3c | Suunto Ambit 3 sport | Tomtom runner 2 | Garmin forerunner 935 | Garmin forerunner 965 | Suunto race s
                    Stryd | Bryton Gardia R300L | Polar H9 | Polar oh1+ | Wahoo bolt v2 | 4iiii precision 3

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                    • S Offline
                      sindavide @Kevin Major
                      last edited by

                      @Kevin-Major
                      Are you sure it is not the hr sensor? I have been using them for over ten years, and they are not durable at all. I think that on average i champnged at least one per year

                      Kevin MajorK 1 Reply Last reply Reply Quote 0
                      • Kevin MajorK Offline
                        Kevin Major @sindavide
                        last edited by

                        @sindavide It very well may be the sensor itself. If they are meant to be disposable then they should be priced accordingly without a replaceable battery. Prior to this my old garmin sensor worked for years with my edge 800.

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                        • C Offline
                          Calando @Kevin Major
                          last edited by

                          @Kevin-Major See my posts above in this thread. In the meantime, I got a new sensor from Suunto, worked again but was also a bit unstable. I left it sitting in my drawer for now; use my Polar H10 still without any problems. The Suunto Smart belt will be a last resort only if the H10 does not work (which seems to be extremely unlikely up to now).

                          This implies that I also think it’s a sensor problem, not a (watch) firmware problem.

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                          • S Offline
                            sindavide @Calando
                            last edited by

                            @Calando
                            I use my race S with other sensors as well (polar H01, Coospo). The only ine with problems is Suunto Smart Sensor, meaning that it is the only one (and had many of them) that looses connection and acts funny.
                            I keep on using the suunto “smart” belt for three reasons 1) exceptional battery duration 2) swimming, as it is the only that memorises HR data to send them to watch after session is stopped 3) when it works and until it dies prematurely, it works well

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                            • E Online
                              elbee @sindavide
                              last edited by

                              @sindavide

                              My polar oh1+ and polar h9 and my stryd looses connection.

                              Suunto support confirmed from the logs, the devices disconnected/connected several times until it didn’t connect anymore and the stryd was not to blame (don’t know how they came to that conclusion)

                              Suunto t3c | Suunto Ambit 3 sport | Tomtom runner 2 | Garmin forerunner 935 | Garmin forerunner 965 | Suunto race s
                              Stryd | Bryton Gardia R300L | Polar H9 | Polar oh1+ | Wahoo bolt v2 | 4iiii precision 3

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