I don't know where you are, but in my country I paid the equivalent of 4 cents for DS18B20. I hook it up to my multipurpose Raspberry Pi and I use it to measure

I don't know where you are, but in my country I paid the equivalent of 4 cents for DS18B20. I hook it up to my multipurpose Raspberry Pi and I use it to measure my room temperature. I bought 2 of them, for redundancy reasons when lockdown started. The other one is still in original package.