Reading Data From Ethernet Client

Projects Programming
1

hey guys

I'm trying to write a program at the moment so i can send a short message (e.g. 12:8:) from a computer (program written in processing) to a arduino (acting as server), I've run into a bit of trouble though, i need the arduino to interpret the message received into two, if that makes sense, for example, if the computer sends 12:8: i need the arduino to see it as

int val1 = 12;
int val2 = 8;

i put the : there because i thought i could tell the arduino to read the buffer upto the : but i can't find out how! the processing one i can write fine, just can't work out how to write the arduino one

any help is appreciated

2

How are you sending it?- I mean what format of message? You could try sending it as an HTTP GET say, and have the server code parse it by looking for the : then look back to the previous space and forward to the next space, that would give you the two digits.

3

A simple way to use the : as a delimiter which you might incorporate in your client code.

//zoomkat 3-5-12 simple delimited ':' string  
//from serial port input (via serial monitor)
//and print result out serial port

String readString;

void setup() {
  Serial.begin(9600);
  Serial.println("serial delimit test 1.0"); // so I can keep track of what is loaded
}

void loop() {

  //expect a string like wer,qwe rty,123 456,hyre kjhg,
  //or like hello world,who are you?,bye!,
  
  if (Serial.available())  {
    char c = Serial.read();  //gets one byte from serial buffer
    if (c == ':') {
      //do stuff
      Serial.println(readString); //prints string to serial port out
      readString=""; //clears variable for new input      
     }  
    else {     
      readString += c; //makes the string readString
    }
  }
}
4

all I'm using to send the message is (in processing)

int val1 = 12;
int val2 = 8;
myClient.write(val1 + ":" + val2);

basically something along those lines is how my client sends the message to the arduino