Problem with serial communication

Projects Programming
8

Try these functions, it might not be exactly want you need though but anyway here:

void sendSerial(long data) {
  Serial.begin(9600);
  Serial.print(data);
  while (Serial.read() != "*") {
    ;
  }
  Serial.print("+");
  while (Serial.read() != "^") {
    ;
  }
  delay(5);
}



long receiveSerial() {
  Serial.begin(9600);
  long returnData = Serial.read();
  Serial.print("*");
  while (Serial.read() != "+") {
     ;
  }
  Serial.print("^");
  return returnData;
}

The function sendSerial() sends the data in the provided parameters, and it waits for a comfirmination before continuing. The function receiveSerial() returns what data sent. This ensures that the processors don't get out of sync.

Hope this helps.