Splitting Uno serial to pass data from XBEE to PC

Projects General Guidance
8

Wait loop/polling vs harware timer ss a good habbit thing for me. It's how I did similar things when I used HCS08 chips.

I appriciate the difficulty that comes with interrupts and how to mitigate their problems. They do seems to be my best option here.

I already gave a project description in the OP. It's a local positioning system that uses syncronised radio and ultrasound pulses. If it helps, I can paste the code that I had working this afternoon. It mostly worked, but the reciever wasn't fast enough to pick up 4us bursts from it's ultrasonic reciever circuit.

==========Rx==================

const int ultrasound = 12;

void setup() {
  Serial.begin(9600);
  pinMode(ultrasound, INPUT);
}

void loop() {
  while (Serial.available() == 0);
  char temp = Serial.read();
  Serial.write(temp);
  int i = 0;
  while (digitalRead(ultrasound) == HIGH) {
     i++;
     if (i == 0) {
       break;
     }
  }
  Serial.print(i);
  Serial.print('\n');
}

============Tx================

const int ultrasound = 13;

void setup() {
  Serial.begin(9600);
  pinMode(ultrasound, OUTPUT);
}

void loop() {
  for (char i = 'A'; i < 'D'; i++) {
    digitalWrite(ultrasound, LOW);
    delay(200);
    Serial.print(i);
    digitalWrite(ultrasound, HIGH);
    delay(50);
  }
}