SmartHomeShop Docs

Radar and Sensor Modules

CeilSense Mini measures presence with Hi-Link mmWave radar and light with a built-in sensor. This page explains the radar options, what each one sees and what cannot be combined.

Current firmware. The current Mini firmware supports LD2412 + LD2450. Builds for the LD2460 and the LD6002B are planned for release. Which configuration ships as standard is announced at release.

What Each Function Needs

Function Needs
Light, LED ring, buzzer, network Nothing extra
Presence, position, zones A radar configuration
CO2, temperature, humidity, air pressure Not available on the Mini

Without a radar the Mini measures no presence. The Mini has no climate sensors and no SCD41 module. For climate readings, see CeilSense V2 and CeilSense Pro.

Which Radar Should You Choose?

The Mini has the same choice of radars as V2. Choose one configuration. All are Hi-Link mmWave radars without a camera.

What you want Choose
To know reliably whether someone is there, also sitting still, and see where up to 3 people are LD2412 + LD2450
To track up to 5 people with a single module LD2460 (firmware planned for release)
To measure height as well as X and Y, with areas in 3D LD6002B (firmware planned for release)

Comparison

LD2412 + LD2450 LD2460 LD6002B
Current Mini firmware Yes Planned for release Planned for release
Modules 2 1 1
Frequency 24 GHz 24 GHz 60 GHz
Presence, also sitting still Yes Yes Yes
People tracked Up to 3 Up to 5 (3 of them still) Up to 3
Coordinates X/Y X/Y X/Y/Z
Field of view ±75° (LD2412); ±60° × ±35° (LD2450) 120° × 90° ±60° × ±60°
Range, slant 9 m presence, 6 m tracking 6 m moving, 5 m still 3 m typical, max. 6 m
Zones 3 rectangles in the radar. Polygons in the Room Designer will follow with release firmware. Polygons in the Room Designer 4 detection areas and 4 interference areas in 3D
ESPHome Native SmartHomeShop component Native since ESPHome 2026.8

What Each Radar Sees

LD2412

Sees whether someone is there, even with micro-movements like breathing. It tells moving and still apart and gives distance and signal energy, but no X/Y position.

LD2450

Tracks up to 3 people with X and Y coordinates, speed and direction. It has 3 rectangular zones in the radar itself. Together with the LD2412 it gives you reliable presence and position.

LD2460

Tracks up to 5 people with X and Y coordinates, of which 3 can be still. It uses a single module with a wide 120° × 90° field of view. The LD2460 does not tell moving and still targets apart. The firmware will run it in top installation mode for ceiling mounting. The LD2460 build for the Mini is planned for release.

Mirrors, metal wardrobes, windows and other large reflective surfaces can create a second target or shift a position.

LD6002B

A 60 GHz radar that measures X, Y and height of up to 3 people. It has 4 detection areas and 4 interference areas in 3D, and the firmware will run it in top installation mode. Firmware for the LD6002B on CeilSense Mini is not finished yet. It is planned for release.

Coverage on the Floor

Module range is not floor coverage. Ceiling height, mounting, obstacles and settings decide coverage. At a 2.7 m ceiling, count on this ground radius:

Radar Movement Sitting still
LD2412 or LD2460 About 4 m About 3 m
LD6002B About 3 m all around About 3 m all around

These figures use 80 percent of the manufacturer's slant figures for ceiling mounting, limited per axis by the field of view. That is why they are lower than the module range in the comparison table. Tracking coverage is not a perfect circle: it is narrower along the axis with the smaller field of view.

Place the sensor centrally in the room.

What Cannot Be Combined

LD2412 + LD2450 is the only two-radar combination.

  • Never fit the LD2460 and the LD2412 at the same time.
  • Never combine the LD6002B with the LD2412 or the LD2460.

These modules share the same connection. Every other pair is not supported either.

The firmware has to match the modules in the device, so changing the radar configuration also means changing the firmware. See Firmware.

Fitting or Reseating a Module

How the Mini ships is announced at release. If you need to fit or reseat a radar module, for example because it is not seen, follow these general steps.

Disconnect all power first. Unplug USB-C and Ethernet.

  1. Disconnect all power.
  2. Work on a clean, dry surface and take care with static electricity: touch a grounded object before you pick up a module, and hold it by the edges.
  3. Open the device as described in the guide that comes with the release.
  4. Fit the module in its matching socket with the correct orientation. Do not force the pins.
  5. Check that the module sits firmly. A radar can miss someone when the module was not fitted firmly.
  6. Close the device and reconnect the power.
  7. Check in Home Assistant that the module is seen: LD2412 Firmware Version and LD2450 Firmware Version should show a value.

Step-by-step photos follow at release.