There are sensors sensitive enough to pick up minute changes in ... It takes some work, but it's still more than doable with a bit of time and patience. There are hundreds of different Arduino builds ...

This isn’t about connecting a temperature sensor in your Arduino. This build is about using the temperature sensor in your clock. The ATMega328p, the chip at the heart of all your Arduino Uno ...

The easy way is to use the Arduino-powered Norman climate simulator from [934Virginia] which leverages data from different locations ... target climate and actual sensor readings in your greenhouse.