Buying guide: Smart Electronics
The Aqara Door Window Sensor E1 is a highly functional choice in the budget smart home category, offering reliable Zigbee 3.0 connectivity and a dedicated battery_low binary sensor. While its 24-hour battery reporting lag and lack of ambient temperature sensing are minor drawbacks, its millivolt voltage reporting makes it a solid performer and good for budget electronics under $50.
Ideal for Home Assistant and Zigbee2MQTT users wanting precise contact tracking, but avoid if you need built-in ambient temperature monitoring.
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