The LD2410C is a compact mmWave radar sensor capable of detecting presence and motion in a room. I’ve put together a “first steps” guide showing wiring, setup, and configuration using the manufacturer’s web-based tool, along with a short demo video.

This is ideal for Home Assistant, ESPHome, or general DIY automation projects. If you’re curious about mmWave detection or want to experiment with radar-based presence sensors, the guide walks you through the basics and shares initial observations.

Check it out here: https://tech.scargill.net/ld2410c-first-steps/