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Hi-Link

LD2420 mmWave sensor DIY

Sensors · Security

WorksLocal

1 report: 1 says it works.

Reported with 1 integration: ESPHome.

What people report

IntegrationIn Home AssistantIn Apple HomeWhat they saidSource
ESPHomeWorks LocalDIY ESP32 sensor with DHT22, works really well
Saved copy
Made my first ESP Home sensor!. https://preview.redd.it/5xkcymli81fe1.jpg?width=4032&format=pjpg&auto=webp&s=e85ae9335924a9ca4375bd23d878115a70d902db Hey everyone, I wanted to share my first ever self made ESP Home sensor! It’s a motion, light, temp, and humidity sensor. Here’s the parts I used: * LD2420 mmwave sensor * DHT22 temp & humidity sensor * Photoresistor and a 1k ohm resistor * D1 Mini ESP32 In total it cost me about $20 to build and works really well. Definitely a good deal considering other similar devices cost around twice as much. It’s not the prettiest build ever but it won’t …

Excerpt saved from the Arctic Shift Reddit archive on 2026-10-23.

Reddit thread · 2025-01

Each row is one report from a GitHub thread, an integration’s docs, or r/homeassistant. Check the date and the linked source before you buy.

In ReReHome

Once Home Assistant’s HomeKit Bridge shares it, this device reaches Apple Home as a HomeKit accessory behind your Home Assistant bridge, so ReReHome shows and controls it like any other.

Identifiers

BrandHi-Link
ModelLD2420
CategorySensors