It’s different than ionizing radiation, and that may very well be a true statement, but unlike the other types of radiation that have massive amounts of research over long periods of time, there’s very little around mmWave. NYU has done some to date. Measuring the effects has been a challenge so far.
2 Likes
My mantra is to let those who want to, be the guinea pigs...
4 Likes
Sorry! Couldn't resist.
5 Likes
Lol. Too late. Change that 5 to a 6 
1 Like
Or if you are a hobbiest, there are a number of cheap uwb sensors out there that can be hubduino-ed.
First real review I've seen. Colour me interested
4 Likes
Supported by zigbee2mqtt, but I can't find one for sale anywhere .....
1 Like
Ya.. same. He did mention it was only available in china and even then would only show up for a few moments on aliexpress so you had to be quick.
1 Like
late too party - i need to replace my zigbee motion sensors (lowes ones). watching this closely
This is a game changer, lights turning off seconds after leaving rooms or lights staying on when sitting still are my last unsolved smart home issues
7 Likes
Why is that?
2 of them have died. and i can't seem to find them anywhere.
They were the centralite ones. Discontinued a few years back. What was out there was on ebay but you cant find them anymore.
There are these Centralite motion sensors...Centralite knows how to make quality devices.
2 Likes
These are occupancy sensors, not motion sensors. I don't think you would be happy with them for the same quick motion active/non-active type use case. It's getting difficult to find good ones. I have just bought one of these Aqara P1 sensors, and it's really working quite well, albeit via an Aqara hub bridged back to Hubitat at the moment.
However, it too is now supported via Zigbee2MQTT and it could possibly work directly joined to Hubitat, but would require a driver written for it to prove if that's a viable option.
2 Likes
How do you bridge the Aqara Hub to Hubitat?
HomeKit via Homebridge. You make a virtual switch and share it with HomeKit via Homebridge. Then you create a HomeKit automation that turns on the switch when the motion sensor is active, and turn the switch off when the motion sensor is inactive.
However, the Aqara P1 and many other devices are supported via Zigbee2MQTT. The easiest way to use that is via Home Assistant and then using Home Assistant Device Bridge, you can bring this and many more unsupported devices into HE. Depending on what you already have going, it is potentially more work to setup and costs a bit more, but the possibilities to use unsupported devices and cloud integrations in HE is massive, instead of being limited to just Aqara devices and it is ultimately much more stable, with fewer things that can go wrong.
1 Like
The other thing people need to keep in mind on this, is that mmWave is very sensitive - so placement (and possibly installing shielding on the sensor) is critical.
There are already many reports from people with the Aqara model that it picks up ceiling fan motion, and they have had to install a rain shield looking hat on it to blind it in the vertical direction, or tilt the device towards the floor.
Have pets? Probably not the device for you either, as pets will likely set it off too. You may be able to play with the sensitivity and work around this, but don't assume you will... They are VERY sensitive, for good and bad.
On the 24Ghz ones I have ceiling fans pretty much always set it off without careful positioning, as do pets. By the time you turn down the sensitivity enough to avoid that, the motion sensing for stationary people gets a bit iffy.
They work awesomely in my home theater room, though, where we don't allow the cats in (as long as the ceiling fan is off... 
).
.------------------------------.
Example below.
First group of on/off red blips is when I turned on the ceiling fan at 8:12am to illustrate the point. No one was in the room.
I then turned the ceiling fan off at 8:20am. Worked great - until the AC kicked on and started turning the ceiling fan blades (the ac vent blows on them enough to turn the blades from the AC air).... Those are the right most red blips.
Obviously I'll have to shield that sensor, or point it more towards the floor to reduce its vertical coverage. The sensitivity is already only at 1/3, I tried it lower, but then it starts having issues with stationary person detection. Side note -with it set to full power I can easily see motion through the drywall walls into other rooms.
In my next 3d printed case I may just make the sensor be on a hinge so that the sensor can be adjusted up/down.
5 Likes
I may have missed it but what sensor are you using now?
That's the dfrobot sen0395.
I also have some 60ghz sensors on order, but who knows when they will ever show up.
