How to read a form field values (Ethernet Shield)

Forum 2005-2010 (read only) General Frequently-Asked Questions
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Below is some server code that works with IDE 0021.

//zoomkat 10-22-10
//routerbot code
//for use with IDE 0021
//open serial monitor to see what the arduino receives
// 

#include <SPI.h>
#include <Ethernet.h>
#include <Servo.h>

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; //physical mac address
byte ip[] = { 192, 168, 1, 102 }; // ip in lan
byte gateway[] = { 192, 168, 1, 1 }; // internet access via router
byte subnet[] = { 255, 255, 255, 0 }; //subnet mask
Server server(84); //server port

String readString, servo1, servo2; 
 
Servo myservo1;  // create servo object to control a servo 
Servo myservo2;
 //////////////////////

void setup(){

//start Ethernet
Ethernet.begin(mac, ip, gateway, subnet);
server.begin();

//enable serial data print 
Serial.begin(9600); 
myservo1.attach(7);
myservo2.attach(6);
Serial.println("bot21"); // so I can keep track of what is loaded
}

void loop(){
// Create a client connection
Client client = server.available();
if (client) {
while (client.connected()) {
if (client.available()) {
char c = client.read();

//read char by char HTTP request
if (readString.length() < 100) {

//store characters to string 
readString += c; 
} 

//if HTTP request has ended
if (c == '\n') {

///////////////
Serial.println(readString);

//readString looks like "GET /?-1500-1500 HTTP/1.1"

      if (readString.length() >0) {
      Serial.println(readString);
            
      servo1 = readString.substring(7, 11);
      servo2 = readString.substring(12, 16);
      
      Serial.println(servo1);
      Serial.println(servo2);
      
      int n1;
      int n2;
      
      char carray1[6];
      servo1.toCharArray(carray1, sizeof(carray1));
      n1 = atoi(carray1); 
      
      char carray2[6];
      servo2.toCharArray(carray2, sizeof(carray2));
      n2 = atoi(carray2); 
      
      myservo1.writeMicroseconds(n1);
      myservo2.writeMicroseconds(n2);
      
      //myservo.write(n);
      readString="";
      } 
  ///////////////////
  
  //now output HTML data header
  client.println("HTTP/1.1 204 Zoomkat");
  client.println();
  client.println();
  delay(1);
  //stopping client
client.stop();

/////////////////////
//clearing string for next read
readString="";
  
}}}}}