Ya, as others have said... esp32 (or esphome)
I have a 4 temp sensor (two DS18B20) that are attached to my in/out water lines to my geothermal water loop, and 2 (DHT22) in the air stream showing/logging IN/OUT air temp.
Don't mind my terrible ms paint drawing :)

I'll stick to Frigate... Wife and I were like "ya, no" when that aired