How to Set Up Your Sonoff SNZB-04 Zigbee Door/Window Sensor

What You'll Need

• Sonoff SNZB-04 Door/Window Sensor
• Zigbee hub (Sonoff ZBBridge, SmartThings, Home Assistant)
• eWeLink app or hub's app
• CR2032 battery (included)

Step-by-Step Setup

1. Insert battery: Pull tab or insert CR2032
2. Put hub in pairing mode: Enable Zigbee device discovery
3. Enter pairing mode: Press and hold button for 5 seconds until LED flashes
4. Wait for discovery: Hub will find the sensor
5. Name sensor: Give it a location name
6. Mount: Place sensor on frame, magnet on door/window
7. Create automations: Set up open/close triggers

Key Features

• Open/close detection: Magnetic reed switch
• Zigbee 3.0: Works with most Zigbee hubs
• Compact design: Small, white sensors
• Long battery: CR2032 lasts 2+ years
• Budget-friendly: Affordable door/window sensor
• Easy install: Adhesive mounting included

Troubleshooting

• Won't pair: Hold button until rapid blink. Move close to hub
• Always shows open/closed: Check magnet alignment. Gap must be small
• Home Assistant: Use ZHA or Zigbee2MQTT
• Slow response: May need Zigbee repeaters if far from hub
• Reset: Hold button 10+ seconds