wireless tag looks interesting .
Mother / cookies do kind of the same with temp and movements, not humidity though. I have them in many places (fridge, attic outside, doors to check temp and movements.)
as they are tiny I also use it to measure the bed temperature and movements under the sheets- you can see if you sleep well and how long (temp and movements)
Temp gets updated once every 5 minutes, a bit to short for thermostat, but ok for fridge and temperature trends.
The reaction time is ~ 2-10 seconds to a movement: round trip for signal from cookie -> mother -> web server @sen.se -> subscription -> indigo plugin(via web server)
The service has an outage about once a week for 1-2 hours. It is hosted in France, the get to the office ~ 8am = 5am East cost time. So if there is an outage at midnight the service comes back after the croissants with cafe au lait are done.
So in summary I hesitate to add more internet based services. If in my world something does not work I know its me and I can fix it.
Karl