This method depends on the main blocks of the Simulink libraries, and there is no need to use the manual programming to build the control system.
To summaries the main idea of this interfacing, I built a mini control system, using Arduino, Simulink and electronics devices.
The project in short, is a control system to control the van speed in a room according to the number of people inside, using an IR sensor maintained on the entrance of the room to detect one person at each crossing, and the system control the van speed on three levels as below:
Level 1 (min): (0-3) person.
Level 2: (4-6) person.
Level 3 (max): (7-9) person.