Note: This documentation refers to Gravio 3.8 or older. For Gravio 4 or newer, please refer to the respective documentation on .
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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