# A Comparison of Common ESPHome-Compatible MMWave Prescence Sensors

## Models

### DFRobot C4001 (SEN0609 Variant)

Not personally evaluated, but seems to be a strong contender, especially for larger spaces

[![image.png](https://bookstack.muchtall.com/uploads/images/gallery/2024-10/scaled-1680-/OVa0wNf4AGSCQARQ-image.png)](https://bookstack.muchtall.com/uploads/images/gallery/2024-10/OVa0wNf4AGSCQARQ-image.png)

- Amazon: Unavailable ("Gravity" SKU SEN0610 listed, but lacks the 8 antenna panels, using 2 instead. Limited feature set and some poor reviews) 
    - DFRobot: [https://www.dfrobot.com/product-2793.html](https://www.dfrobot.com/product-2793.html)
    - Digikey: [https://www.digikey.com/en/products/detail/dfrobot/SEN0609/23028638?s=N4IgTCBcDaIMoFEByAGAbCgnCAugXyA](https://www.digikey.com/en/products/detail/dfrobot/SEN0609/23028638?s=N4IgTCBcDaIMoFEByAGAbCgnCAugXyA)
    - Mouser: [https://www.mouser.com/ProductDetail/DFRobot/SEN0609?qs=HFfMDpzxxd21aKNJkzimmg%3D%3D](https://www.mouser.com/ProductDetail/DFRobot/SEN0609?qs=HFfMDpzxxd21aKNJkzimmg%3D%3D)
- Cost: $14
- Features: 
    - Prescence Detection up to 16m (52ft)
    - Motion Detection up to 25m (82ft)
    - Horizontal Detection Angle of 100°
    - Vertical Detection Angle of 40°

### LD2450

AKA: HLK-LD2450

[![image.png](https://bookstack.muchtall.com/uploads/images/gallery/2024-10/scaled-1680-/UPvEDEPIOfp8M4Zp-image.png)](https://bookstack.muchtall.com/uploads/images/gallery/2024-10/UPvEDEPIOfp8M4Zp-image.png)

- Amazon: [https://www.amazon.com/gp/product/B0CGNM1VLM/](https://www.amazon.com/gp/product/B0CGNM1VLM/)
- Cost ($): $9 ea. @ $45 for 5
- Features  
    
    - Prescence Detection up to 6m (19ft)
    - Azimuth (L/R): ±60° (120?)
    - Pitch (Up/Dn): ±35° (70?)
    - Track up to 3 targets\*
    - Define up to 3 zones\*
    - 2 sensors might cover the same area and more effectively than an LD1125H, for less cost

\* May be an ESPHome implementation-specific limitation that can be overcome by tweaking the lambdas

### LD1125H

AKA: HLK-LD1125H-24G

[![image.png](https://bookstack.muchtall.com/uploads/images/gallery/2024-10/scaled-1680-/jhPCIfFuB14VQfYa-image.png)](https://bookstack.muchtall.com/uploads/images/gallery/2024-10/jhPCIfFuB14VQfYa-image.png)

- Amazon: [https://www.amazon.com/EC-Buying-HLK-LD1125H-24G-Millimeter-Respiratory/dp/B0C743T4H9/](https://www.amazon.com/EC-Buying-HLK-LD1125H-24G-Millimeter-Respiratory/dp/B0C743T4H9/)
- Cost ($$$): ~$25 ea. (Might be able to be sourced cheaper via AliExpress, etc)
- Features 
    - Moving Body Detection up to 8m (26ft)
    - Stationary Body Detection up to 4m (13ft)
    - Ceiling Mounted Body Detection 2m (6.5ft) radius @ 3m (10ft) height
- Limitations 
    - Not cost-effective when an LD2450's range will do
    - No target tracking or zones
    - Movement filtering, such as for a fan, must be done by a radius range with an implementation-specific lambdaSEN0610