Using the MySense app:
- click on the three-lines (menu) icon in the top left corner
- tap “Devices” and this will take you to a list of all of the MySense sensors
- scroll down this list to see the status of each sensor. If a sensor is online it will state “Online” in green, or a battery percentage in green for those devices without mains/direct power.
If a sensor is showing offline, troubleshoot using these articles: