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Hello there I try to interface arduino with php. My problem is when i click the button, my LED did not light on. The information that i entered in the form has been recorded in the phpmyadmin. I want both the LED light on and the information is save in phpmyadmin. how can i solved this LED problem. <?php // SPECIFY USB PORT TO USE $usb_comPort = "COM3"; switch($_POST) { case isset($_POST['submitOn']): exec("ECHO 1 > $usb_comPort"); // Turn On LED 1 break; case isset($_POST['submitOff']): exec("ECHO 2 > $usb_comPort "); // Turn Off LED 1 break; case isset($_POST['submitOn1']): exec("ECHO 3 > $usb_comPort"); // Turn On LED 2 break; case isset($_POST['submitOff1']): exec("ECHO 4 > $usb_comPort"); // Turn Off LED 1 break; case isset($_POST['submitOn2']): exec("ECHO 5 > $usb_comPort"); // Turn On LED 3 break; case isset($_POST['submitOff2']): exec("ECHO 6 > $usb_comPort"); // Turn Off LED 1 break; case isset($_POST['submitOn3']): exec("ECHO 7 > $usb_comPort"); // Turn On LED 4 break; case isset($_POST['submitOff3']): exec("ECHO 8 > $usb_comPort"); // Turn Off LED 1 break; case isset($_POST['allon']): exec("ECHO 1,3,5,7 > $usb_comPort"); // Turn ON ALL 4 LED Bulbs break; case isset($_POST['alloff']): exec("ECHO 2,4,6,8 > $usb_comPort"); // Turn OFF ALL 4 LED Bulbs break; } ?> </head> <body> <h1>Parking Layout</h1> <form method="post" action=""> <label>First Name</label> <input type="text" name="First_Name" /> <br /> <label>Last Name</label> <input type="text" name="Last_Name" /> <br /> <label>Phone Number</label> <input type="number_format" name="Phone_Number" /> <br /> <br /> <br /> <label>Date</label> <input type="date" name="Date" /> <br /> <br /> <br /> <label>Time</label> <input type="time" name="Time" /> <br /> <br /> <br /> <form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>" > <input type='submit' name='submitOn' value='Turn LED 1 ON'> <input type='submit' name='submitOff' value='Turn LED 1 OFF'> <br><br> <input type='submit' name='submitOn1' value='Turn LED 2 ON'> <input type='submit' name='submitOff1' value='Turn LED 2 OFF'> <br><br> <input type='submit' name='submitOn2' value='Turn LED 3 ON'> <input type='submit' name='submitOff2' value='Turn LED 3 OFF'> <br><br> <input type='submit' name='submitOn3' value='Turn LED 4 ON'> <input type='submit' name='submitOff3' value='Turn LED 4 OFF'> <br><br> <input type='submit' name='allon' value='Turn ALL LEDs On'> <input type='submit' name='alloff' value='Turn ALL LEDs Off'> </form> </body> </html>
