Yeah.
Link to check devices supported by esphome (which make it easy to configure in home assistant) https://devices.esphome.io/
Esp8266 Wemos D1 mini https://a.aliexpress.com/_c3y0qeA3
DH22 Humidity and temperature sensor https://a.aliexpress.com/_c3XQ9FsF
Breadboard to connect them https://a.aliexpress.com/_c4kYJrWB
Cables to connect them https://a.aliexpress.com/_c2zuMp5d
You can buy the sensors of aliexpress and link them with esp8266 via esphome (a home assistant addon) if you’re into it.
It’s fairly easy if you’re a tech savvy and will cost you next to nothing like 3 dollars each node which can have multiple sensors (temp / humidity / light / relay / etc).
It’s better to make dumb devices smart yourself to avoid being locked out. I literally cannot change the water level in my vacuum mopper if the server in china is down.
Great app and AI disclosure. AI is a tool and useful when used properly.
Gonna try it!