Third Reality's Zigbee Door Sensor is a two-piece contact sensor for doors and windows that reports open and closed to Home Assistant the moment the magnet separates.
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Reports an open or closed contact state over Zigbee for door, window, cabinet, and mailbox automations at low cost. An adjustable open-delay setting holds off brief openings before the state reports, which cuts nuisance alerts. Battery powered with a low-battery report. Pairs directly with ZHA or zigbee2mqtt, fully local.
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