Check this one: https://www.mysensors.org/view/65/Bed-Occupancy-Sensor
I think it covers your needs.
Related thread on electronics forum with some ideas.
Awesome, lots of great ideas in there. Thanks, now I have something to do this weekend!
For an off-the-shelf solution the IFTTT capable Nokia Sleep should be released soon, https://health.nokia.com/uk/en/sleep
Ok, that Nokia thing is cool … Super cool … 
According to TechCrunch it should be released “ first quarter of 2018 for $100.”
US only? Or something for the rest of the humanity? 
Will be shipping in 1 - 2 weeks and currently 2 are available for 169€… sounds like a good deal if it works as intended
Hi everybody,
I’ve got a solution which is cheaper than Nokia Sleep but more expensive than a made-self hardware !
I placed a Fibaro Door Sensor under each side of the bed (under each person) !
This solution depends on kind of bed you have !
When it well placed, if a person is on the bed, the contact is done:
3 Likes
My bed slats aren’t that flexible but it’s an ingenious solution.
That Nokia Sleep seems nice! Anyone got experience of IFTTT, is the delay acceptable?
from what i’ve seen after one night, the ifttt-connection is pretty responsive. it takes about 10 to 60 seconds until the ifttt-webhook triggers when i get into bed and about 2-10 seconds if i get out. setting the nokia sleep up seems pretty straightforward and simple and i like the app and how it shows the data it pulled out of my sleep phases.
nokia health offers a pretty well documented API, so there should also be a way to pull all kind of dfata out of it, once there’s a integration. for now, the ifttt-thing seems to work well, though the only triggers available now, are geting in and out of bed, which is fine for most automation purposes. once there’s an integration, one could get the actual time when one falls asleep or wakes up, which might also be nice.
Have a look at this, I made one for approx $30 with parts from China and is working fantastic.
3 Likes
Using eight sleep component for that, combined with a power usage sensor (zwave) to detect if my phone is charging.
For a simple (no bed modification) bed occupancy sensor I’m going to try putting an MS5611 Atmospheric Pressure Sensor in a drybag with headphone feed through. The headphone feed through allows power in and signal out to an ESP8266 board. Just slip the partially inflated sealed bag with the sensor inside between the mattress and one of the slats. Will let you know how it goes once the parts have arrived.
Bad. I couldn’t stop the air leaking out. I did however find a cheap, easily applied and reliable solution:
1 Like
Hmm to see if its charging thats a good one.
The only thing i would love to see is an app on ios/android which syncs the alarm clock so you can use that to automate stuff (since you set that the day before normally) at least i do.