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.

AM2302 / DHT22 Temperature-Humidity Module

DHT22/AM2302 is a mature educational and hobby environmental-sensing format with broad library support across Arduino, ESP and Raspberry Pi…

SKU BLZ-366

$29.99

AM2302 / DHT22 Temperature-Humidity 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

DHT22/AM2302 is a mature educational and hobby environmental-sensing format with broad library support across Arduino, ESP and Raspberry Pi ecosystems.

Listed as

Eiechip High Precision AM2302 DHT22 Digital Temperature & Humidity Sensor Module for arduino Uno R3

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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.