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Shelly Door Window 2 - Smart Door and Window Sensor The Shelly Door Window 2 is a compact, wireless smart sensor that monitors the opening and closing of doors and windows via your home WiFi network—no extra hubs needed. Easily install this device to enhance your home security and receive real-time alerts remotely through the Shelly Cloud app. Key Features Wireless Connectivity: Connects directly to your home WiFi network without requiring additional hubs. Real-time Alerts: Get instant notifications when doors or windows open or close, keeping you informed when away or during adverse weather. Wide Compatibility: Works seamlessly with Android, iOS, Amazon Alexa, and Google Assistant for smart home integration. Multi-Sensor Functionality: Detects door/window status, monitors temperature, and measures ambient light with an integrated LUX sensor. Wire-Free Installation: Easily mount on any door or window frame without the need for wiring. Remote Monitoring: Control and monitor your home from anywhere using the Shelly Cloud smartphone app. Compact and Lightweight: Discreet design fits unobtrusively on doors and windows. Specifications WiFi Module: ESP8266 with 2MB flash memory Programming/Debug Header: Available for flashing alternative firmware Power Requirements: Requires USB-to-UART adapter and reliable 3.3V power supply with at least 350 mA current (for developers) For Developers The Shelly Door Window 2 supports developers with a programming/debug header for flashing custom firmware. It features an ESP8266 chip with 2MB flash memory. Development requires a USB-to-UART adapter and a stable 3.3V power supply capable of delivering at least 350 mA. Additional Features Temperature Sensor: Monitor indoor temperature changes to maintain comfort. Light Sensor: Integrated LUX sensor detects ambient light levels for enhanced automation.