HTML / Php代码，无法使用Raspberry Pi打开灯
[英]Html/Php Code for turning on lights using Raspberry Pi not working
问题描述
So I have been working on a project to turn on/off LED lights remotely through my Raspberry Pi but I have run into an issue. 
因此，我一直在从事通过Raspberry Pi远程打开/关闭LED灯的项目，但是遇到了问题。
My index.html code should work properly but when I press the on or off button, nothing happens. 我的index.html代码应该可以正常工作，但是当我按下开或关按钮时，什么也没发生。 The issue is not with the actual commands ( sudo python /var/www/html/scripts/lights/lampon.py or sudo python /var/www/html/scripts/lights/lampoff.py ) because when I run the same command directly in the raspberry pi terminal, it works. 问题不在于实际命令（ sudo python /var/www/html/scripts/lights/lampon.py或sudo python /var/www/html/scripts/lights/lampoff.py ），因为当我运行相同的命令时直接在树莓派终端中工作。 And the rest of my code also seems to be correct... So I don't know what the problem is. 我的其余代码也似乎是正确的……所以我不知道问题出在哪里。
The code looks like this: 代码如下：
<html>
<head>
<meta charset="UTF-8" />
<link rel="stylesheet" type="text/css" href="css/style.css">
</head>
<?php
if (isset($_POST['LightON']))
{
exec("sudo python /var/www/html/scripts/lights/lampon.py");
}
if (isset($_POST['LightOFF']))
{
exec("sudo python /var/www/html/scripts/lights/lampoff.py");
}
?>
<form method="post">
<button class="btn" name="LightON">Light ON</button>
<button class="btn" name="LightOFF">Light OFF</button><br><br>
</form>
</html>
Any help would be appreciated. 任何帮助，将不胜感激。 Thanks in advance. 提前致谢。
NOTE: I am able to run the sudo command above as a normal user and the lights work but when I press the button, it doesn't work (webpage seems to load - so its doing something... but the lights do not turn on). 注意：我能够以普通用户身份运行上面的sudo命令，并且指示灯可以工作，但是当我按下按钮时，它不起作用（网页似乎已加载-因此其正在执行某项操作……但是指示灯没有亮起上）。
2 个解决方案
解决方案1
0 2018-06-07 10:33:03
You can do it just like this: 您可以这样做：
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>LED Control</title>
</head>
<body>
LED Control:
<form method="get" action="gpio.php">
<input type="submit" value="ON" name="on">
<input type="submit" value="OFF" name="off">
</form>
<?php
$setmode17 = shell_exec("/usr/local/bin/gpio -g mode 17 out");
if(isset($_GET['on'])){
$gpio_on = shell_exec("/usr/local/bin/gpio -g write 17 1");
echo "LED is on";
}
else if(isset($_GET['off'])){
$gpio_off = shell_exec("/usr/local/bin/gpio -g write 17 0");
echo "LED is off";
}
?>
</body>
</html>
But you need to install Wiring Pi on Raspberry Pi first, to install it : 但是您需要首先在Raspberry Pi上安装Wiring Pi，然后进行安装：
$ sudo apt-get install git-core
$ git clone git://git.drogon.net/wiringPi
$ cd wiringPi
$ ./build
I hope that i was useful :) 我希望我有用:)
解决方案2
0 2018-10-16 23:44:21
Well, that's the problem. 好吧，这就是问题所在。
You are using PHP code inside a file called, " Index . html ". 您使用的是被称为“ 指数 。HTML”文件中的PHP代码。
For PHP code to work it has to be in a file called, " Index . php ". 对于PHP代码工作，它必须是在一个名为“ 指数 。PHP的 ”文件。
The important part is that php code goes into files with an extension of .php and the same for html files. 重要的部分是php代码进入扩展名为.php的文件 ，而html文件也是如此。
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