This page provides guidance on identifying and resolving issues with the VitalPro breathing sensor. 

This sensor is the core of Tymewear and it both independently records / saves activity data although activities need to be started / ended inside the Tymewear App or a connected device like Garmin. 

Updating the Breathing Sensor

If you update the firmware to firmware 0.82 (Nov 2025) and the breathing sensor is not able to connect, please unpair (forget this strap) and pair again.  For Garmin Device, restarting them and also testing to start / end an activity and repeating can restore the breathing sensor connection. 

Wearing the Breathing Sensor

The breathing sensor does not have to be positioned in the center of your back. . If you are using an optional extension strap, the breathing sensor will be to one side.

Aim to keep the position consistent and use the same notch each time when attaching (so it has the same tightness). 

If you wear bib-knicks for cycling, wear the breathing sensor over the top of the braces (straps). This ensures that the braces do not interfere and impact the ventilation data. The heart rate monitor at the front can still be warn underneath the front braces 

Breathing Sensor does not appear as connected

If you have previously successfully connected and paired the breathing sensor, however it does not appear inside the Tymewear App, this is likely an indicator that:
• The breathing sensor is currently connected to another device and is not available. Turn off or disconnect it from other devices
• The battery has drained and needs to be replaced. 

If you feel that the battery is new, you can remove the battery and replace it again. This has the effect of resetting the breathing sensor.

You can also 'Unpair' the breathing sensor (Forget this strap) and pair / connect again

Breathing Sensor appears but not showing data

Make sure you are wearing the VitalPro. If you are in the Tymewear App - click on the + to start an activity. If you see the page to adjust the fit and see the line being shown and representing your breathing, this is a good sign. Just allow a few more moment for the Breathing Rate to appear. 

Otherwise, removing and inserting the same battery can provide a reset and allow you to then connect.