motion - sensor

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jio motion sensor

Jio Wireless PIR Motion Sensor For Home Security 

The motion sensors uses infrared to detect movement in a 170° field with a range of 7 meters. These sensors are used to detect motion in the kitchen, bathroom, bedroom corridor and trigger relevant automations.. mostly turning on lights & sirens. E.g. after the alarm clock goes off in the morning there's a 15min window in which the corridor sensor will turn on lights in the bathroom and kitchen areas.

These sensors communicate over the Zigbee protocol. Zigbee uses a 2.4GHz band that's similar to Wifi. It's main advantage is however that it forms a mesh network. So a tiny sensor running on a button cell doesn't have to connect at a central hub but rather uses the nearest mains powered device to repeat its signal. Since most of the devices are also controlled over Zigbee I in any project have a fairly extensive Zigbee mesh and these sensors never need to broadcast very far. In general the button cell of most of the sensors seems to last between 1-2years before needing to be replaced.

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