irRepeater.ino

/*
 * IRrecord: record and play back IR signals as a minimal 
 * An IR detector/demodulator must be connected to the input RECV_PIN.
 * An IR LED must be connected to the output PWM pin 3.
 * A button must be connected to the input BUTTON_PIN; this is the
 * send button.
 * A visible LED can be connected to STATUS_PIN to provide status.
 *
 * The logic is:
 *  If an IR code is received, record it. send the IR code.
 *
 */

#include <IRremote.h>

int RECV_PIN = 7; // pin of ir receiver 
int BUTTON_PIN = 12; //
int STATUS_PIN = 13;
int lastButtonState;

IRrecv irrecv(RECV_PIN);
IRsend irsend;

decode_results results;

void setup()
{
  Serial.begin(9600);
  irrecv.enableIRIn(); // Start the receiver
  pinMode(BUTTON_PIN, INPUT);
  pinMode(STATUS_PIN, OUTPUT);
}

// Storage for the recorded code
int codeType = -1; // The type of code
unsigned long codeValue; // The code value if not raw
unsigned int rawCodes[RAWBUF]; // The durations if raw
int codeLen; // The length of the code
int toggle = 0; // The RC5/6 toggle state

// Stores the code for later playback
// Most of this code is just logging
void storeCode(decode_results *results) {
  codeType = results->decode_type;
    Serial.println("Received unknown code, saving as raw");
    codeLen = results->rawlen - 1;
    // To store raw codes:
    // Drop first value (gap)
    // Convert from ticks to microseconds
    // Tweak marks shorter, and spaces longer to cancel out IR receiver distortion
    for (int i = 1; i <= codeLen; i++) {
      if (i % 2) {
        // Mark
        rawCodes[i - 1] = results->rawbuf[i]*USECPERTICK - MARK_EXCESS;
        Serial.print(" m");
      } 
      else {
        // Space
        rawCodes[i - 1] = results->rawbuf[i]*USECPERTICK + MARK_EXCESS;
        Serial.print(" s");
      }
      Serial.print(rawCodes[i - 1], DEC);
    }
    Serial.println("");
}

void sendCode(int repeat) {
    // Assume 38 KHz
    irsend.sendRaw(rawCodes, codeLen, 38);
    Serial.println("Sent raw");
}


void loop() {
  int buttonState = digitalRead(BUTTON_PIN);
  // Wait for receving signal
  if (irrecv.decode(&results)) {
    digitalWrite(STATUS_PIN, HIGH);
    storeCode(&results);
    irrecv.resume(); 
    digitalWrite(STATUS_PIN, LOW);
    delay(30); // Wait between receving and sending 
    digitalWrite(STATUS_PIN, HIGH);
    sendCode(lastButtonState == buttonState); // relay signal to ir lights
    digitalWrite(STATUS_PIN, LOW);
    delay(30); // Wait between retransmissions
    Serial.println("Released");
    irrecv.enableIRIn(); // Re-enable receiver
  }
  lastButtonState = buttonState;
}