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Example code of tgeindre/php-gpio

Informations about the package php-gpio

PHP-GPIO master build

A simple library to read/write Raspberry PI GPIOs with PHP.

Forked from ronanguilloux/php-gpio and tested with Atoum.

Install

This library can be installed using Composer:

Read/Write Raspberry Pi GPIOs

To read/write Raspberry Pi GPIOs, use the PhpGpio\Gpio class. The instanciation of this class requires an array of pins numbers you will use.

You can define a specific list of pins numbers, according to your usage and your Rasberry Pi version, or you can use the PhpGpio\Utils\Pi class to automaticly find all availables pins:

Accessing to the GPIOs requires root permissions, so make sure your code is running with enought permissions. Remember: you should never run your webserver as root.

Here is a simple example of Gpio class usage:

Check this page if you need a complete list of availables pins on your Raspberry Pi version.

Demo

Here is a simple demo using a Raspberry Pi 3 and some LED (click on the image to see the video):

Demo video

Source code

Sensors

Currently, this library only supports MCP analogic to digital converter (ADC) with 4 or 8 channels:

MCP3002, MCP3004 & MCP3008

mcp3004

Given that the Rapsberry Pi supports only digital inputs, an ADC, such as a MCP, is required to read analogic data.

MCP3002, MCP3004 and MCP3008 work the same way but have dedicated classes for each version:

It use a SPI interface wich requires, at least, 4 pins:

Provided classes use a software communication system so you can use any pins you wich.

Here is the connection schema of those 3 versions of MCP ADC:

mcp

Wiring:

Now you are ready to read some data:

All versions of php-gpio with dependencies

PHP Build Version
Package Version
Requires php Version >=5.6.0
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