Modifications

For more advanced testing, I have a small board with a block of 10 LEDs on and a little push-button switch:

For more advanced testing, I have a small board with a block of 10 LEDs on and a little push-button switch:

[[Fichier:Pi-WiringPi-Exemple-Quick2Wire-21.jpg|480px]]<br /><small>Source: [http://wirinPi.com wiringPi.com]</small>

[[Fichier:Pi-WiringPi-Exemple-Quick2Wire-22.jpg|480px]]<br /><small>Source: [http://wirinPi.com wiringPi.com]</small>

Here is a variant of the program I used when testing wiringPi v2′s ability to use the mcp23017 GPIO expansion chip:

Here is a variant of the program I used when testing wiringPi v2′s ability to use the mcp23017 GPIO expansion chip: