Home Assistant has an official integration for Hi-Link LD2410 distance sensor over Bluetooth (LD2410 BLE - Home Assistant)
This is based on a python class managing sensor connection and data (GitHub - 930913/ld2410-ble: Interface with LD2410B modules from HiLink)
The newer LD2450 also publishes data over bluetooth, however its protocol is totally different from the LD2410 one, so i modified the python class and the integration code to manage it.
Eventually, it works
The sensor only outputs coordinates of up to three targets and their speed, but those are not much useful so a big part of the available sensors in HA are calculated (distance, angle, moving, presence…)
The integration It is working both for the sensor part and for the control part. All over BT.
For what concerns sensors:
- for each target (up to 3) the integration exposes a specific binary sensor so you can know how many targets are present
- there is also a generic binary sensor for “someone” presence
- for each target the integration calculates distance and angle. Original sensor values (coordinates of targets) are present, but normally hidden
For what concerns sensor control the integration exposes:
- reboot
- single target vs multi target
- area mode (disabled, detect only, ignore in)
- configuration of coordinates for the 2 points of each of the three supported areas.
Bonus: a 3d model for a sensor’s case (yes, i was getting bored 
)
Just put the code in the custom integration folder.
Link to repo:
