For Arduino IDE, download zip file from the repository (Github page) by select Code dropdown at the top of repository, select Download ZIP From Arduino IDE, select menu Sketch -> Include Library -> ...

The DHT20 is a humidity and temperature sensor. The sensor has a fixed address of 0x38. It is not known if the address can be changed. The library must be initiated by calling the begin() function.

Beyond ‌Touch ID‌ and a faster chip, the code suggests that 2026's Apple Watch lineup will be a considerable upgrade more broadly.

Touch ID might be coming to Apple Watch According to specific entries in the code, Apple has been experimenting with some form of biometric authentication on the Apple Watch.