Using some methods found in a Python library and playing with an actual Omega, I've put together a PHP library that accesses the pins on the Omega via fopen rather than running shell commands. It seems to work pretty reliably, and doesn't have to dump out to shell.

I put the whole project and instructions on Github here: https://github.com/ringmaster/GPIOHelperPHP

It produces an interface in a browser that looks like this:

The Direction column lets you toggle the direction of the pin, and you can set 0/1 or toggle any pin. The current status of a pin is listed in the Status column.

I'm looking for a reference that describes analog states for any pins, or what values can be fed to these filesystem objects so that more functionality can be exposed via this library. Any help there is appreciated.

Pull requests welcome.

I wrote a little script and wired up a breadboard to animate some LEDs using a shift register and three pins. It was a simple, fun project for this beginner.

Here's a video: https://youtu.be/kFACgPoifn4

I used my home-grown PHP GPIO library to control the board. The implementation was pretty simple. Here's the script in the repo.

I wrote a little script and wired up a breadboard to animate some LEDs using a shift register and three pins. It was a simple, fun project for this beginner.

Here's a video: https://youtu.be/kFACgPoifn4

I used my home-grown PHP GPIO library to control the board. The implementation was pretty simple. Here's the script in the repo.

@Boken-Lin How does this differ from setting a pin direction to "in" and reading it periodically? I don't know of a clean way, in PHP at least, to attach event handlers to filesystem changes without polling.

I made another simple project using this library that lets me detect a button press and toggle an LED, but it proves out that inputs can work, too.

I was thinking of maybe incorporating an event loop in the GPIOHelper class that would debounce and fire event handlers. Code that uses it would look something like:

How could the edge interface be used to improve this?

Using some methods found in a Python library and playing with an actual Omega, I've put together a PHP library that accesses the pins on the Omega via fopen rather than running shell commands. It seems to work pretty reliably, and doesn't have to dump out to shell.

I put the whole project and instructions on Github here: https://github.com/ringmaster/GPIOHelperPHP

It produces an interface in a browser that looks like this:

The Direction column lets you toggle the direction of the pin, and you can set 0/1 or toggle any pin. The current status of a pin is listed in the Status column.

I'm looking for a reference that describes analog states for any pins, or what values can be fed to these filesystem objects so that more functionality can be exposed via this library. Any help there is appreciated.

Pull requests welcome.