This is a zigbee device, and the recent zigbee firmware update has been causing mysterious events on a number of zigbee devices. See the following thread:
Hub firmware release 16.7 will contain support for ZigBee OTA firmware updates for a few devices. What is OTA you ask? Read more to find out.
Q: What is an OTA firmware update?
A: A firmware update is the way that manufacturers can fix bugs or add features to their products after they are manufactured. An OTA firmware update is the process of updating a device wirelessly rather than having to connect a computer or special equipment to the device to perform the update.
Q: What firmware updates are available?
A: Updates for the 2015 SmartSense Motion and Multipurpose sensor will be included in the initial release.
Q: What is changed in these firmware updates?
A: These firmware updates include some bug fixes and minor features.
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