BeagleBoneBlack PHP-GPIO




Posted in TechnologyComputers

Introduction: BeagleBoneBlack PHP-GPIO

Before you start with this tutorial download this list:

• Putty (
• WinSCP (
• Editor (
• 7-ZIP (
• Win32-DiskImager (
• Debian Image (
Required hardware:
• 4GB microSD-card

Step 1: Flash Your BeagleBoneBlack

Extract the debian_flasher.img.xz with 7-ZIP

Select the extracted .img with Win32-DiskImager and copy it to your SD-card

Flash your beaglebone:
• insert the microSD-card into the slot on the back of the BeagleBone Black
• now click the User-Button. It’s located on the same side of the BBB as the microSD card slot.
• Hold the "User Boot" button down, and then plug in the power (USB or 5V adaptor). Keep holding down the button until you see the bank of 4 LED's light up for a few seconds. You can now release the button.
• It will take some minutes to flash the image to the on-board chip. (15-50mins)
• Once it’s done, the bank of 4 LED’s will all stay lit up at the same time. You can now remove the power and the microSD-card.

Step 2: Install the Webserver

Power on your BBB and connect with putty.
If you don’t know the IP-address of your BBB connect to the Web interface of your router and you will find it under connected devices.

username:  debian
password: temppwd

Install the webserver:
• apt-get install apache2
• apt-get install php5 libapache2-mod-php5
• /etc/init.d/apache2 restart

Step 3: Add Your First Php-script

edit the etc/rc.local example for gpio 30:
• echo 30 > /sys/class/gpio/export
• chmod 666 /sys/class/gpio/gpio30/value
• chmod 666 /sys/class/gpio/gpio30/direction
• echo out > /sys/class/gpio/gpio30/direction
• exit 0

To power on a gpio30 you can use this php-command:
shell_exec("echo \"1\" > /sys/class/gpio/gpio30/value");

The default path of the webserver directory is: /var/www/

Now you can connect with winscp and the root user (user:root, pw:root) to this directory and add some of your php-scripts.

If you have any further questions, do not hesitate to contact me:



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    Were is the source code?

    1) Hello kindly post source file. As you are showing the html (php) page in the browser...

    2) How can we also control the 4 leds situated in


    i tried

    chmod 666 /sys/class/leds/beaglebone:green:usr3/brightness

    and changed the of source script but it didn;t work

    3) LED SETUP

    asking very basic because when i was a noob that time i know that there is not much info regarding the topic (php beaglebone black)