Is there any way to build a motion detection system for the door for Home Assistant? So that you can then detect whether a person entered or left a room through the door?
#Motion detection entering or leaving a room?
rotund kite
short junco
If you have two motion detectors you can define the based on the order they were triggered
Or combine it with an mmwave presence sensor
rotund kite
Or combine it with an mmwave presence sensor
You mean this ?
short junco
That's an option yes, but there are cheaper options
rotund kite
That's an option yes, but there are cheaper options
There are cheaper ones?
Can you show me some?
short junco
There's these Tuya Wifi or Zigbee devices
There are also Wifi devices running ESPHome, like the Everything Presence Light
There are also some battery powered alternatives, which activate mmwave as soon as they detect motion, like these Tuya Zigbee devices, or this Aqara Bluetooth one
Note I don't have experience with any of these devices
ripe blade
If you use Bluetooth, you could also have a look at the Bermuda integration from HACS. It uses Bluetooth proxies, which are very cheap.
versed sparrow
(Obligitory reccomendation for Apollo Automtion's MSR-2 (https://apolloautomation.com/products/msr-2)
rotund kite
If you use Bluetooth, you could also have a look at the [Bermuda](https://github...
Yeah, I've heard of Bluetooth triangulation before. But I don't think it would help in my case. Because it requires that each person's cell phone is connected. But I don't know if everyone agrees with that.
rustic trail
Are you wanting to know how many people are in the room, or just whether there is "one or more" people there?
rotund kite
Are you wanting to know how many people are in the room, or just whether there i...
"One or more" would be enough for me.
But I would also like it to recognize when someone comes through the door, but if they don't enter the room then the light stays off. And as far as I know, this only works with a motion detector that has the function of dividing a room into several individual areas.
But I'm not sure😬
rustic trail
Detecting a person entering is easy. Any cheap PIR sensor will do that. Detecting a person leaving is much harder. The cheaper ones will just trigger a timeout and assume that if nobody is detected for xx seconds, the room is empty. No good if you're using it to trigger kitchen lighting and stand still at a sink to be plunged into darkness.
For my kitchen I found a presence sensor https://www.amazon.co.uk/gp/product/B0C555YZQ3 (sadly not currently available from Amazon: pinfresa TS0202 looks as if it's the same product but I can't guarantee that). This almost does what I needed, by giving different events for presence and absence. I say almost, because I usually leave the kitchen door open and it would trigger when I walk past the door rather than through it.
I tried placing the sensor so that it faces away from the door. That prevented it being triggered walking past the door, but then I had to be a couple of feet into the room before it triggered and there didn't seem to be an optimum place which detected me soon enough but didn't give false triggers each time I walked past the door.
The solution was to add a second sensor https://www.amazon.co.uk/gp/product/B0C23F733B/ just behind the doorframe, so that it picks me up immediately I enter. That turns the lighting on quickly and then the presence sensor takes over, keeping it on until I leave. OK, so it also detects me again when I leave the room, but because the main sensor turns the lights off a short while after I leave, it doesn't matter.
This has worked fine for about 6 months.
