I am very new here and have no experience with PHP and just need this one application to work. I think I am pretty close, but for some reason it doesnt work.
In my setup, I use an Arduino Uno eith the Ethernet Shield 2 to host a basic HTML website that just displays some text based on the input on 5 pins. That part works just fine, but now I want to read this text and include it on a website Im working on. After some googling I thought that it could be done with a simple PHP script, but it doesnt work with the Arduino, I dont get an error message, it just doesnt work.
Here is my Arduino code:
#include <SPI.h>
#include <Ethernet2.h>
// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = {
0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED
};
IPAddress ip(192, 168, 1, 177);
// Initialize the Ethernet server library
// with the IP address and port you want to use
// (port 80 is default for HTTP):
EthernetServer server(80);
void setup() {
// Open serial communications and wait for port to open:
Serial.begin(9600);
//while (!Serial) {
//; // wait for serial port to connect. Needed for Leonardo only
//}
// start the Ethernet connection and the server:
Ethernet.begin(mac, ip);
server.begin();
Serial.print("server is at ");
Serial.println(Ethernet.localIP());
}
void loop() {
// listen for incoming clients
EthernetClient client = server.available();
if (client) {
Serial.println("new client");
// an http request ends with a blank line
boolean currentLineIsBlank = true;
while (client.connected()) {
if (client.available()) {
char c = client.read();
Serial.write(c);
// if you've gotten to the end of the line (received a newline
// character) and the line is blank, the http request has ended,
// so you can send a reply
if (c == '
' && currentLineIsBlank) {
// send a standard http response header
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
//client.println("Connection: close"); // the connection will be closed after completion of the response
client.println("Refresh: 30"); // refresh the page automatically every X sec
client.println();
client.println("<!DOCTYPE HTML>");
client.println("<html>");
// output the value of each analog input pin
for (int analogChannel = 0; analogChannel < 6; analogChannel++) {
int sensorReading = analogRead(analogChannel);
if(sensorReading>1000){
client.print("Toilet ");
client.print(analogChannel);
client.print(" is occupied.");
client.print("<br />");
}
else{
client.print("Toilet ");
client.print(analogChannel);
client.print(" is free.");
client.print("<br />");
}
}
client.println("</html>");
break;
}
if (c == '
') {
// you're starting a new line
currentLineIsBlank = true;
}
else if (c != '') {
// you've gotten a character on the current line
currentLineIsBlank = false;
}
}
}
// give the web browser time to receive the data
delay(1);
// close the connection:
client.stop();
Serial.println("client disconnected");
}
}
My PHP code:
<?php
function get_data($url) {
$ch = curl_init();
$timeout = 5;
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
$data = curl_exec($ch);
curl_close($ch);
return $data;
}
echo get_data('http://192.168.1.177/');
?>
I am fully aware that there are much more elegant and more effective solutions for what I am trying to achieve, but in this case, I really just need this to work, it doesnt have to be perfect! My guess is that I have to configure the Arduino in some way to allow this connection, but I dont know enough about this...
I hope you can help me, thanks in advance! :)
