A motion sensor can automate lights, send security alerts, and save energy. Discover how it works and where to install it in your home.

How does a motion sensor work?

Home motion sensors use PIR (Passive Infrared) technology — they detect variations in heat emitted by the human body when it enters the sensor's field of view. When motion is detected, they send a signal to the app or other connected devices, triggering an automatic action.

What is it used for in practice?

• Automate lights — The hallway light turns on when you pass by and automatically turns off after a few minutes. Without touching the switch.
• Security alerts — Receive a notification on your phone when motion is detected at home while you're away.
• Energy saving — Lights that only turn on when someone is in the room eliminate waste.
• Smart routines — Combine with cameras, sirens, or other devices to create automatic responses to intrusions.

Where to install it at home?

• Hallway and entrance — The most common location. Automatic light when entering and motion alert when you're away.
• Garage — Light that turns on when you drive in, without needing to look for the switch.
• Garden or balcony — Outdoor motion detection with an alert on your phone.
• Stairs — Automatic night lighting for safety.
• Children's bedroom — Alert when the child gets up during the night.

Wi-Fi vs Zigbee — which to choose?

The Tuya Wi-Fi/Zigbee PIR Motion Sensor supports both protocols:

• Wi-Fi — Connects directly to the router, no hub needed. Simpler to get started.
• Zigbee — Requires a Zigbee gateway, but consumes less power and has a greater range in networks with multiple devices.

For most homes, the Wi-Fi version is sufficient and easier to set up.

FAQ

Does the sensor work in the dark?
Yes. PIR technology detects body heat, not light — it works equally well day and night.

What is the detection angle?
Most home PIR sensors have a 120° angle and a range of 5 to 8 meters — enough to cover an entire room.

Can I receive alerts on my phone?
Yes. Through the Tuya or Smart Life app, you receive push notifications whenever motion is detected.

Tags

automação casa inteligente pir portugal segurança sensor de movimento smart home wi-fi zigbee

• Share on:
• WhatsApp
• Deel
• X
• Pin it
• Messenger
• Email

---