WeKnowSmartHome

DIY Zigbee mmWave presence sensor

Detects people even when they sit still, and reports to your hub over Zigbee. IntermediateZigbeeESP32-C6mmWave

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

Build timeNot stated

DifficultyIntermediate

ToolsComputer and USB-C cable to flash the firmware

SolderingNot stated (the parts list uses Dupont wires)

3D printingNo case included

What you need

ESP32-C6 board
HLK-LD2410C mmWave radar (LD2410 and LD2410B also work)
Dupont wires
USB-C data cable

How it works

Board: ESP32-C6 (ESP32-C6-WROOM-1)
Connects via: Zigbee, paired through Zigbee2MQTT
Made by: SmartHomeScene

Good to know

The author says it is not a simple build and not a production-ready device.
Since February 2026 the original project is no longer actively developed; the article points to community forks that continue it.

Build itTutorial on SmartHomeSceneFull 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).

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