Executing a PHP Script with Arduino and Ethernet Shield - get

Question

Im working on a project with an Arduino and Ethernet Shield.
I would like to execute a php script (residing on my server) in the loop.
#include <SPI.h>
#include <Ethernet.h>
// MAC address from Ethernet shield sticker under board
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192,168,1,77); // IP address, may need to change depending on network
EthernetServer server(80); // create a server at port 80
String HTTP_req; // stores the HTTP request
void setup()
{
Ethernet.begin(mac, ip); // initialize Ethernet device
server.begin(); // start to listen for clients
Serial.begin(9600); // for diagnostics
}
void loop()
{
EthernetClient client = server.available(); // try to get client
if (client) { // got client?
boolean currentLineIsBlank = true;
while (client.connected()) {
if (client.available()) { // client data available to read
char c = client.read(); // read 1 byte (character) from client
HTTP_req += c; // save the HTTP request 1 char at a time
Serial.print("connected");
client.println("GET http://domain.com/arduino/scripts/script_motion_detection_driveway.php HTTP/1.0");
client.println();
} // end if (client.available())
} // end while (client.connected())
delay(1); // give the web browser time to receive the data
client.stop(); // close the connection
} // end if (client)
}
When I run the code and load the page, instead of executing the script it just prints the line:
GET http://domain.com/arduino/scripts/script_motion_detection_driveway.php HTTP/1.0
over and over again...
The reason its in the loop as opposed to setup is because eventually the GET request will be placed inside an if statement to test a condition.
What do I need to change to execute the script?

Answer 1

You should check this example: http://www.arduino.cc/en/Tutorial/WebClient
You want to execute a GET request without telling the client to connect to the server at the port 80.
if (client.connect(server, 80)) {
Then you make your http request
// Make a HTTP request:
client.println("GET /search?q=arduino HTTP/1.1");
client.println("Host: www.google.com");
client.println("Connection: close");
client.println();
Then you try to read the request
if (client.available()) {
char c = client.read();
Serial.print(c);
}
By putting these parts together in a better way than your script above, you will successfully get the output of your php script.