How to control your LED

[John W]

It's pretty simple.

Just write this in the terminal.
On: /etc/init.d/led_on
Off: /etc/init.d/led_off
Blink: /etc/init.d/led_blink

// John

[johannes]

Nice!
Just to check, would you mind if I snatch this idea? We are right now working on a collection of articles (how-to's) and this would make a great contribution.

Thanks,

[John W]

Yeah, good idea.

I found this and was thinking of the LED on the Bubba.
http://wiki.gudinna.com/202

Does anybody feel for making a PHP-script that flashes the front LED everytime somebody visits your site.
I think that would be cool.

// John

[Takiko]

another cool idea would be to make it blink when someone is logged on through ssh or something. ^

[TheEagleCD]

I'd find it useful if the LED would start blinking for an adjustable amount of time once a download is finished. Then I'd immediatly know when I can get my next dose of DL.TV without having to check the web-interface every 5 minutes.

Cheers,
Christoph

[Filip]

I have made a solution to control the led with a simple PHP-script!

In the command line

Code: Select all

su

And type the password ('excito' by default)

Then type:

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visudo

And add the following line to the end of the file:
ALL ALL=NOPASSWD:/etc/init.d/led_blink, /etc/init.d/led_on, /etc/init.d/led_off
Save it and exit.

That will make it possible for everyone to execute the command to control the led. Now any user may execute the command from the command line:
sudo /etc/init.d/led_blink

This is then used in any PHP-script to control the led

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<?php
exec('sudo /etc/init.d/led_blink');
?>

It may also be combined like:

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<?php
exec('sudo /etc/init.d/led_blink; sleep 5; sudo /etc/init.d/led_off');
?>

Now it's up to someone else to enhance the feature even more!

[John W]

Nice!

I made a simple php-script which you can controll your led with.

Here's the code.

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<a href=?led=on>On</a><br />
<a href=?led=off>Off</a><br />
<a href=?led=blink>Blink</a><br />

<?php
	if ($_GET['led'] == "on")
	{
	exec("sudo /etc/init.d/led_on");
	}
	if ($_GET['led'] == "off")
	{
	exec("sudo /etc/init.d/led_off");
	}
	if ($_GET['led'] == "blink")
	{
	exec("sudo /etc/init.d/led_blink");
	}
?>

// John W

[msx]

lol
i tryed it, did you see the led blinking?

[John W]

I saw it blinking a couple of minutes ago.

[msx]

so the next step is making a script that takes a string and outputs it on the led using morse code

[Filip]

The following command takes 19 seconds to execute before it prints "Hello world!". Shouldn't it be possible to continue directly without having to wait until the execution is ready?

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<?php
exec("sudo etc/init.d/led_on; sleep 5;  etc/init.d/led_off; sleep 5; etc/init.d/led_on; sleep 1; etc/init.d/led_off; sleep 3; etc/init.d/led_on; sleep 5; etc/init.d/led_off;");
print "Hello World!";
?>

If there is a way to continue, the possibilities are endless of what you can do with the LED! For example sending morse code!

[John W]

Maybe this could come in handy.

http://sweclockers.com/forum/showthread ... ost7195352

[tor]

Cool stuff

I have an embryo to a short article on attaching a USB Display to Bubba. That would be cool to use for letting web visitors leave messages to you in your living room... interested?

/Tor

[John W]

Cool stuff

I have an embryo to a short article on attaching a USB Display to Bubba. That would be cool to use for letting web visitors leave messages to you in your living room... interested?

/Tor

Offcourse we are!
Sounds interesting.

// John W

[John W]

I made some progress today.
The LED will stay lit for 5 seconds. Then it will be turned off. And you don't have to wait for the process to finish.

blink.php

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<a href=?led=blink>Blink</a>
<?php
	if ($_GET['led'] == "blink")
	{
	exec("sudo /etc/init.d/led_mod > /dev/null 2>&1 &");
	}
?>

led_mod

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#! /bin/sh

/usr/sbin/gpioapp on
sleep 5
/usr/sbin/gpioapp off

// John W