Smart Sensors - Temperature + Motion

I am upgrading my thermostats from Nest to Honeywell or Ecobee (whichever I find has the best deal). I’m going to use smart sensors in my rooms for motion detection to turn on/off lights. It would be great to have sensors that were connected to power as opposed to battery and also detect temperature. Any advice or good place to get something like this? I’d love to here success and failure stories so I know what to look for and stay away from. Thanks y’all! Happy New Years!!!