RoomSense Zigbee multisensor

A modular room sensor that combines radar, climate, light, air pressure and sound level. AdvancedZigbeeESP32-H2mmWave

Updated November 2026

Illustration of what you build. See the maker’s guide for photos of the real device.

Can I build this?

Estimated costNot stated (parts list in the repository)
Build timeNot stated
DifficultyAdvanced
ToolsComputer to flash the firmware
SolderingNot stated
3D printingNot stated (design notes in the repository)

What you need

  • ESP32-H2 board
  • HLK-LD2450 radar (presence and position)
  • SHT41 temperature and humidity sensor
  • BH1750 light sensor
  • BMP280 pressure sensor
  • INMP441 microphone (sound level)

How it works

Board
ESP32-H2 development board
Connects via
Zigbee (works as a router), paired through Zigbee2MQTT; no Wi-Fi or cloud needed
Made by
PolarRaccoon (GitHub)

Good to know

Build itGitHub repositoryFull instructions, wiring and firmware from the maker →

This page summarises the maker’s project; the maker’s own guide is leading. Missing a tool? See In the toolbox. Need a better casing? See 3D printing & enclosures. Keep DIY builds to low voltage (USB or battery).

More projects

BeginnerWi-FiESP32ESPHome

Smart pellet level monitor

An ultrasonic sensor measures how much fuel is left in a pellet boiler.

SmartHomeScene
IntermediateWi-FiESP32ESPHome

Bathroom humidity fan controller

Switches a fan on when the air gets damp, using dew point instead of a fixed humidity level.

Julius (jwmw), Home Assistant Community
BeginnerWi-FiESP32ESPHome

Smart plant moisture sensor

A soil moisture monitor that can trigger watering reminders or an irrigation system.

SmartHomeScene