The Raspberry Pi is an ARM PC that gives you the ability to use the GPIO pins for sensor inputs and outputs.
ARM based PC’s look and act like x86 PC’s, but require specific Operating Systems and software.
There are numerous Raspberry Cases just like with Desktop Computers. You can pick the case that best for cooling, and for add-ons.
There are a number of different Raspberry Pi versions with different levels of resources, and at many price points.
- GPIO Pinout – https://www.raspberrypi.org/documentation/usage/gpio/
- gpiozero Library – https://gpiozero.readthedocs.io/en/stable/
- Raspberry Pi Operating Systems – https://www.raspberrypi.org/downloads/