RF Capture sketch

#define MINIMUMDURATION 50 //minimum low or high signal duration for a valid signal in microseconds
#define MAXIMUMDURATION 20000 //maximum low or high signal duration for a valid signal
#define MINIMUMSILENCE 30000 //minimum low period after a complete signal in microseconds
#define MAXEDGES 800 //maximum samples, limited by RAM

int timings[MAXEDGES];
int edges = 0;
long signalstart = 0;
long signalend;
long interval;
boolean validSignal = true;
boolean captureFinished = false;

void setup() {
  Serial.begin(9600);
  pinMode(2, INPUT);
  pinMode(6, OUTPUT);
  digitalWrite(6, LOW);
  while (digitalRead(2) == LOW) {}
}


void loop() {
  if (!captureFinished) {
    if (signalstart == 0) {
      signalstart = micros();
    }
    while (bitRead(PIND, 2) == HIGH) {}
    signalend = micros();
    interval = signalend - signalstart;
    //Serial.println(interval);
    if (interval > MINIMUMDURATION && interval < MAXIMUMDURATION ) {
      timings[edges] = interval;
      edges++;
    }
    else {
      edges = 0;
      validSignal = false;
      captureFinished = true;
    }
    if (validSignal) {
      while (bitRead(PIND, 2) == LOW && (micros() - signalend) < MINIMUMSILENCE ) {}
      signalstart = micros();
      interval = signalstart - signalend;
      if (interval > MINIMUMDURATION && interval < MAXIMUMDURATION ) {
        timings[edges] = interval;
        edges++;
      }
      else if (interval >= MINIMUMSILENCE) {
        captureFinished = true;
      }
      else {
        validSignal = false;
        captureFinished = true;
      }
    }
    if (edges >= MAXEDGES - 2) {
      captureFinished = true;
    }

  }


  else {
    if (validSignal && edges > 10) {
      captureFinished = false;
      Serial.print("Signal captured with ");
      Serial.print(edges+1);
      Serial.println(" edges");
      Serial.println("-");
      for (int i = 0; i <= edges; i++) {
        Serial.print(timings[i]);
        Serial.print(" ");
      }
      Serial.println(" ");
      Serial.println("-");
      Serial.print("int intervals[] = {");
      for (int i = 0; i < edges; i++) {
        Serial.print(timings[i]);
        Serial.print(", ");
      }
      Serial.print(timings[edges]);
      Serial.println("};");


      Serial.println("Sending signal");
      delay(3000);
      boolean high = false;
      for (int i = 0; i <= edges; i++) {
        if (high) {
          digitalWrite(6, LOW);
          high = false;
        }
        else {
          digitalWrite(6, HIGH);
          high = true;
        }
        delayMicroseconds(timings[i]);
      }
      digitalWrite(6, LOW);
      Serial.println("...sent");
    }
    else {
      captureFinished = false;
      validSignal = true;
    }
    edges = 0;
    signalstart = 0;
  }

}