The Sonoff DW2-WiFi door/window sensor is a Wi‑Fi contact sensor with eWeLink app support and optional local control via LAN/MQTT. It offers push notifications and easy app pairing for basic alarm use, but advanced local-only setups require SonoffLAN/MQTT configuration and some features may be simplified when bridged through Matter.
Buy if you want a Wi‑Fi door/window sensor that integrates with eWeLink and Home Assistant; avoid if you need true plug‑and‑play local control without any cloud/account or technical MQTT setup.
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