LD2410 24GHz Radar Presence Detector bluetooth

[wasyl00]

Describe the problem you have/What new integration you would like I noticed very promising new presence detector module HLK-LD2410.

Please describe your use case for this integration and alternatives you've tried: I always want reliable room occupancy detection in my house.

Additional context Module is very cheap which is great: https://www.aliexpress.com/item/1005004351593073.html?ug_edm_item_id=1005004351593073

So more info here: https://www.youtube.com/watch?v=dAzHXpP3FcI

[nagyrobi]

There's also a Bluetooth-enabled version, HLK-LD2410B, which has the advantage of being wireless => better possible placement for optimal detection.

Could go with bluetooth_proxy but in that case we need a HA integration for it.

[nagyrobi]

See yaml and .h for HLK-LD2410:

https://community.home-assistant.io/t/mmwave-wars-one-sensor-module-to-rule-them-all/453260/2

[nagyrobi]

Also: https://github.com/rain931215/ESPHome-LD2410

Doc, chinese: https://github.com/circircir-circle/human_exist_device

[keniji]

Just have bought LD2410B and waiting for it. The manufacture has released a tool for Android and iOS. With this tool, users can adjust/config the module directly on a mobile phone: https://www.youtube.com/watch?v=wgP3yod4ALI I can find the APP in iPadOS's APP Store in China region, but no luck with Google Play.

Edit: So since LD2410B can be configured through Bluetooth, is it possible to use an ESP32 to communicate with LD2410 through Bluetooth as well?

[randybb]

you have to download it from their web and it is only in chinese https://community.home-assistant.io/t/mmwave-wars-one-sensor-module-to-rule-them-all/453260/40

[keniji]

you have to download it from their web and it is only in chinese https://community.home-assistant.io/t/mmwave-wars-one-sensor-module-to-rule-them-all/453260/40

Many thanks, in fact downloading the APP is not my concern 😆 Just wondering if we can communicate with LD2410B via an ESP32 through Bluetooth.

[Niorix]

English docs https://drive.google.com/drive/folders/1p4dhbEJA3YubyIjIIC7wwVsSo8x29Fq-?spm=a2g2w.detail.0.1.59b64881KlgyJ4

[nagyrobi]

Wonderful, including all serial protocol description. @ssieb maybe you wanna have some fun

[nagyrobi]

https://github.com/esphome/esphome/pull/3919

[Niorix]

Get data over Bluetooth algoritm (use gatttol):

1. gatttool -b -I
2. connect
3. char-write-req 0x9 0100 //enable notification on 0x8 handle, but no any output
4. mtu 512
5. char-write-cmd 0x6 fdfcfbfa0800a80048694c696e6b04030201 //undocumented command a800, in HLKRadarTool.apk described as CMD_TYPE_CHECK_KEY. 48694c696e6b - HiLink in HEX. After this command LD2410 begins to send notifications. May be release bluetooth case in new platform?

[regevbr]

see https://github.com/esphome/esphome/pull/4434 which you can start using right away

[ssieb]

Since the sensor is supported now, I modified the title to add bluetooth since that's not supported.