C# Arduino serial communication (2 different sets of data)

Question

I have been reading about image processing data using C#. I need to send to Arduino object coordinates. I sent data about x coordinate with the code I wrote below, but I still could not send y coordinates, because I don't know how Arduino will separate x and y coordinates. Is there a method to send data from 2 different channels?

if (serialok == true) {
  int second =0;
  int offset=300;
  second = offset - Math.Abs(objectX);
  map =(float) 0.85 * second;
  buffer[0] = (byte)Math.Abs((int)map);
  serialPort1.Write(buffer, 0, 1);

This is how I read the above code from Arduino.

if(Serial.available()>0) {
  inbyte=Serial.read();
}
servo1.write(map(inbyte,0,255,0,180));
delay(15);

Sorry for my English.

Answer 1

Solution by OP.

combines the data as a string in c# , send that sting value serial port 1 and parse on arduino .

#include <Servo.h>

Servo servo1;
Servo servo2;
const byte numChars = 32;
char receivedChars[numChars];
char tempChars[numChars];        // temporary array for use when parsing

     // variables to hold the parsed data
char messageFromPC[numChars] = {0};
int integerFromPC = 0;
float floatFromPC = 0.0;

boolean newData = false;

//============

void setup() {
   Serial.begin(9600);

   servo1.attach(2);
   servo2.attach(4);
}

//============

void loop() {
   recvWithStartEndMarkers();
   if (newData == true) {
       strcpy(tempChars, receivedChars);
           // this temporary copy is necessary to protect the original data
           //   because strtok() used in parseData() replaces the commas with \0
       parseData();
       showParsedData();
       newData = false;
   }
}

//============

void recvWithStartEndMarkers() {
   static boolean recvInProgress = false;
   static byte ndx = 0;
   char startMarker = '<';
   char endMarker = '>';
   char rc;

   while (Serial.available() > 0 && newData == false) {
       rc = Serial.read();

       if (recvInProgress == true) {
           if (rc != endMarker) {
               receivedChars[ndx] = rc;
               ndx++;
               if (ndx >= numChars) {
                   ndx = numChars - 1;
               }
           }
           else {
               receivedChars[ndx] = '\0'; // terminate the string
               recvInProgress = false;
               ndx = 0;
               newData = true;
           }
       }

       else if (rc == startMarker) {
           recvInProgress = true;
       }
   }
}

//============

void parseData() {      // split the data into its parts

   char * strtokIndx; // this is used by strtok() as an index

   strtokIndx = strtok(tempChars,",");      // get the first part - the string
   strcpy(messageFromPC, strtokIndx); // copy it to messageFromPC

   strtokIndx = strtok(NULL, ","); // this continues where the previous call left off
   integerFromPC = atoi(strtokIndx);     // convert this part to an integer
servo1.write(map(integerFromPC, 0, 255, 0, 180));


   strtokIndx = strtok(NULL, ",");
   floatFromPC = atoi(strtokIndx);     // convert this part to a float
servo2.write(map(floatFromPC, 0, 255, 0, 180));
}

//============

void showParsedData() {

}