Batten down the hatches! Keep your doors, windows, and cookie cupboard safe and secure! The Sonoff Zigbee Door/Window Sensor is a low cost and solution for monitoring your doors and windows within a smart home setup. Use it to easily check that you haven't left a downstairs window open at night or to automatically turn on the bathroom light when you open the door. It comes with a battery pre-installed that will last for over five years allowing for minimal maintenance. Installation couldn't be simpler, just use the included 3M adhesive tape to fix the sensor and magnet modules to the door/window and the frame. Security and savings If you live in household where the kids forget to close the garage door after a bike ride or your partner leaves windows open while the central heating struggles to keep up then these handy little sensors are just what you need! Within your home automation setup you can create rules for what happens when a door or window is opened or closed or if it is left open for a specific period of time. These rules can trigger notifications or events such as turning a light on or off. You can also easily, at a glance check the state of all of your monitored doors and windows. To use Zigbee devices you'll either need a Zigbee compatible USB dongle connected to an always-on computer (a Raspberry Pi is ideal!) or a dedicated Smart Home solution like the awesome Home Assistant Green (+ Zigbee Donel) or Sonoff iHost. Why we love it The Sonoff Zigbee range provides great functionality at an excellent price point. They are high quality products that are easy to setup and deliver reliably. Over five years of battery life: Set it and forget it - just replace the batteries every half decade or so! Long-range performance: Powered by the energy-efficient and secure Zigbee protocol, it offers excellent range while conserving power. Know your home at a glance: No more second-guessing if things are locked or secure—it works seamlessly on doors, windows, drawers, garage doors, blinds, and more. Works great with Home Assistant: Our favourite open-source smart home software! Check out our beginner friendly Learn guide for set up instructions. Easy setup: Installation is a breeze with the included 3M adhesive—stick it up in seconds, no tools required! Smart, simple, and secure – doors and windows just got a whole lot brighter! 🚪✨ Tech specs Battery: 3V CR2477 (included, lasts for over five years) Connectivity: Zigbee 3.0 Environment: -10°C to 60°C (5 to 95% relative humidity) Weight: 33g Installation: 3M adhesive tape (suitable for most doors and windows) Installation gap: < 20mm Dimensions: Sensor: 50.5×32×21.9 mm Magnet: 27×12×12.4 mm Resources Check out the SNZB-04P knowledge centre for technical details, compatibility, troubleshooting and setup tips. What is Zigbee? Zigbee is a wireless standard enabling low-power, secure connections between smart devices. Widely used in home automation for devices like thermostats, sensors, and locks, its energy efficiency allows some devices to run for years on a single coin cell battery. It has many benefits but the biggest one for us is its local nature, there's no cloud subscription or even internet connection required - everything stays within your home if you want it to. This makes it both incredible secure and also resilient to internet connection outages. Many big brands have Zigbee supported devices including IKEA, Philips Hue, Tuya, and of course Sonoff. This means you can combine devices from different manufacturers into the same smart home setup ensuring you're not locked in to a single vendor - nice! With an indoor range of 10–100 meters and extended outdoor coverage, Zigbee’s mesh networking ensures reliable communication, even if some devices go offline. Security features, including encryption and key protection, safeguard your smart home, keeping it secure and under your control. Learn more about Zigbee on the official Zigbee website.
