How to blink an LED using Raspberry Pi

As we have already seen for Arduino, the blinking LED is the Hello World! of physical computing. So, regarding Raspberry Pi, we are also going to start with this recipe. Let's go!

Getting ready

Delphi does not support direct deployment on Raspberry Pi with Rasbian OS, so for communication with the board, it was necessary to develop a TCP/IP server to send commands to the RPI so that they are interpreted and transformed into other ones (for example, the lighting of the LED). The server is developed using FreePascal, a language very close to Delphi. In order to use and make the most of the developed server, it is necessary to install FreePascal and Lazarus IDE. Here is the link: http...