SONOFF SNZB-03P

Quick verdict

A cheap, reliable Zigbee PIR motion sensor. It does one thing — detects motion — and does it well. The P version improves range and battery over the original. At this price you can scatter them around the house for motion-activated lights without thinking twice about the cost. Just remember it is basic PIR, not presence detection.

Standout: One of the cheapest Zigbee motion sensors available, making whole-house motion detection affordable.

Last checked: 2026-03-23

Compatibility snapshot

Why it stands out

• very cheap for a Zigbee motion sensor — easy to put one in every room
• reliable PIR detection with adjustable sensitivity in zigbee2mqtt
• improved battery life and range over the older SNZB-03

Reasons to hesitate

• requires a Zigbee coordinator — no standalone use
• PIR sensors have a cooldown period — not instant for repeated triggers
• no light level sensor built in (unlike some pricier competitors)

Best for

• Home Assistant users building motion-activated lighting automations on a budget
• covering multiple rooms with motion sensors without spending a fortune

Avoid if

• you do not have a Zigbee coordinator
• you need mmWave-level presence detection for occupancy (this is basic PIR)

Privacy and local-control notes

Pure Zigbee device with no cloud component. Fully local when paired with a Zigbee coordinator.

Home Assistant support: supported · integration path: zigbee2mqtt / ZHA.

Buying reality check

Price notes: Budget-priced PIR motion sensor. The P version replaces the original SNZB-03 with better range and battery life.

Compare side by side: see sensor comparisons →