GITHUB PROJECT: https://github.com/Pi4J/pi4j-example-crowpi
For this example we are going to use a CrowPi, which is a starter kit in a laptop-housing. Of course, you can get any electronics starter kit for this purpose or buy separate components. That’s the fun of electronics: components are inexpensive and easy to find on ebay or one of the many web shops.
As the CrowPi contains a lot of components, this example is described on the following subpages: