hey guys so I have just come across this thread and I can see something beautiful going on here. May I just ask what is the best mmWave sensor I can buy and the best board to run it on? i.e. ESP8266 or ESP32? thanks.
If you have Bluetooth setup on your HA, 2022.3 has support for directly integrating a HLK-LD2410B over Bluetooth. I’ve tried it and it works great, no need for an esp32 or esp8266.
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I have bluetooth setup however my bluetooth node is meters away (on the first floor) from where I would want to have my mmWave sensor (on the ground floor). Would it still work reliably?
Not sure but you could add some bluetooth proxies
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Hey so how have you connected it. I see it has 5 pins have you just provided 5v and the rest is taken care by Bluetooth on HA?
Yes, just soldered 5V to the end 2 pins from a USB cable
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Nice will try it👍🏼
Is it possible to integrate it with a PIR motion sensor as well?
Not the mmwave board directly. You’d need a microcontroller like a D1 mini to handle the PIR and to communicate it’s state. Depends if you care about the size.
I just got a couple of these in. I soldered a USB cable to the VCC and GND. HA is able to pick up the sensor and detects motion, however only for a few minutes then it goes unavailable. I’ve tried this with two different sensors and both have the same issue. Anyone else having this issue?
Had this issue, too. Then I switched to an old usb power supply. Seems the quick charge / fast charge power supplies kill the voltage when they did’t recognize an “intelligent” device. My old simple power supply works pretty stable.
Thanks for the tip! I just tried several different USB chargers but no luck getting a response in HA. I confirmed I have 5V at the sensor and I can also see the device in the HLKRadar-Tool app. I don’t think the problem is with my bluetooth proxy. The proxy is less than 3 meters away. I have a few Xiaomi TH sensors connecting through it without issue.
I was able to get this working in HA using this repo and a d1 mini (tx GPIO15 / rx GPIO13). I really wish though I could have figured out how to just use BLE reliably. Not sure if it was a signal issue or what.
I played around with the app and home assistant this morning. For some reason home assistant couldnt pair to the ld2410 anymore. After a restart of ha I was able to reconnect it.
Now, my device disconnects, too. It works the whole day but in the night the connection died. Now I am able to find it with the radar app but home assistant doesn’t reconnect.
Hello,
Thanks for the great post! I ordered a couple of LD2410B sensors to test. What i am interested is to use them for turning off the lights when no one is in a room.
Unfortunately, I have a cat and she tends to either sleep on the sofa or get up to some furniture where she can see the entire room. Most probably she feels more safe there I don’t know…
I believe that with the cat in the room the sensor will never report an empty room right? Is there any way you can set the sensitivity of such sensors through the app? If not, does anyone have more experience in terms of placement of the sensor to avoid “seeing” the cat?
Thanks
Curious about the pet issue as well.
For standard PIR sensors, I’m currently using more than one. I try to position one for doorways where they won’t pick up the cat (mounted lower, but pointing at an upwards angle) to control turning the lights on. Other broader coverage sensors control turning the lights off. Far from perfect, lights may stay on too long when the cat is in the room, but it keeps lights from cycling while the cats are roaming.
Here are two more sensors to consider.
CEM5855H & CEM5855F
These two are more reliable than LD1115h and LD2410 and are in the same price range. Would love to see more people doing tests on these two sensors.
I’m testing the LD2410C to turn the lights on in my garage, and I have only had 2 false positives. One was last night, and after watching camera footage of my garage, I found it was a mouse that set it off! A mouse!! Maybe I should focus more on rodent control than electronics.
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