What is the difference between Zigbee and Wi-Fi smart-home sensors?

Zigbee sensors use a low-power mesh that needs a hub or USB coordinator but sips battery and keeps data local; Wi-Fi sensors connect straight to your router but use more power and often depend on a cloud app.

What is a mmWave presence sensor?

A mmWave radar sensor detects tiny movements such as breathing, so it can tell a room is occupied even when someone sits perfectly still — something ordinary PIR motion sensors cannot do.

HC-SR501 Human Infrared Sensor Module

An HC-SR501 PIR motion sensor with adjustable sensitivity and hold time, for occupancy lighting, alarms, and presence-triggered projects.

SKU BLZ-382

$19.99

HC-SR501 Human Infrared Sensor Module is part of the BooLabz Sensors, Robotics & Smart Home collection: the sensors, cameras, servo drivers, and robot kits that let projects perceive and move.

Why we shortlisted it

An HC-SR501 PIR motion sensor with adjustable sensitivity and hold time, for occupancy lighting, alarms, and presence-triggered projects.

Listed as

HC-SR501 PIR Motion Sensor Detector Module

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FAQs

What is the difference between Zigbee and Wi-Fi smart-home sensors?: Zigbee sensors use a low-power mesh that needs a hub or USB coordinator but sips battery and keeps data local; Wi-Fi sensors connect straight to your router but use more power and often depend on a cloud app.
What is a mmWave presence sensor?: A mmWave radar sensor detects tiny movements such as breathing, so it can tell a room is occupied even when someone sits perfectly still — something ordinary PIR motion sensors cannot do.