Perhaps pass that value into the GPIO function like this
$gpio->output(14, $x); //x is the value that i send by ajax and received by php
I am just assuming this might work
I am also using php gpio library, as my gpio code works fine when i run it from the command line. Like php filename.php, the led turns on.
My question is how do i go about doing a simplest experiment possible? && Does my approach makes sense?
Below is the code.......
HOPEfull i have explained this well
please ask more question as i probably missed stuffff.....OH for the output on my html page i get all the echo statements in my php file but the led doesn't turn on?
Code: Select all
<?php
$x = $_POST['firstname'];
require '/home/pi/intoYourPath/vendor/autoload.php';
use PhpGpio\Gpio;
$x = 1;
echo "Setting up pin 14\n";
$gpio = new GPIO();
$gpio->setup(14, "out");
echo "Turning on pin 14\n";
$gpio->output(14, $x);
echo "Sleeping!\n";
sleep(3);
echo "Turning off pin 14\n";
$gpio->output(14, 0);
echo "Unexporting all pins\n";
$gpio->unexportAll();
?>
<html>
<head>
<script language="JavaScript" type="text/javascript">
function ajax_post(){
// Create our XMLHttpRequest object
var hr = new XMLHttpRequest();
// Create some variables we need to send to our PHP file
var url = "my_parse_file.php";
var fn = document.getElementById("first_name").value;
var vars = "firstname="+fn;
hr.open("POST", url, true);
// Set content type header information for sending url encoded variables in the request
hr.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
// Access the onreadystatechange event for the XMLHttpRequest object
hr.onreadystatechange = function() {
if(hr.readyState == 4 && hr.status == 200) {
var return_data = hr.responseText;
document.getElementById("status").innerHTML = return_data;
}
}
// Send the data to PHP now... and wait for response to update the status div
hr.send(vars); // Actually execute the request
document.getElementById("status").innerHTML = "processing...";
}
</script>
</head>
<body>
<h2>Ajax Post to PHP and Get Return Data</h2>
Value from ajax to php server: <input id="first_name" name="first_name" type="text" />
<br /><br />
<input name="myBtn" type="submit" value="Submit Data" onClick="javascript:ajax_post();">
<br /><br />
<div id="status"></div>
</body>
</html>