Activation mode
A single green flash means that the sensor and the magnet are moving either away from or towards each other.

Searching Gateway mode
Red flashes every second for a longer period means that the device is searching for a gateway/hub.
Lost Connection mode
When the red LED flashes 3 times, it means that the device has failed to connect to a gateway.
Low Battery mode
Two consecutive red LED flashes every 60 seconds means that the battery should be replaced.
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