| Symptom | Explanation | Remedy | Comments |
|---|---|---|---|
| Energy harvesting door/contact sensor not reacting | The sensor may have run out of battery | Put the sensor into direct sunlight for a few hours. You can also see if the sensor connects to the dongle if a light flashes up at the dongle if you put the magnet next to the sensor. | The sensor also emits a regular signal every few hours with the current status (open/close) to indicate it’s “still alive” |
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