/*
  Author: Stefano Martino
  Versione: 1.1 - 11 dec 2019

  With this AnalysIR mod you can read long raw IR Remote codes used tipically on Airconds and hvac systems.
  The extracted RAW can pasted directly on the Coocking Hacks SEND Sketch, without any other mods.

  NOTE: for some aircon isn't necessary to repeate the code!

  Credit: Copyright AnalysIR 2014-2019
  http://www.analysir.com/blog/2014/03/19/air-conditioners-problems-recording-long-infrared-remote-control-signals-arduino/

  PINOUT (only tested on Arduino UNO):

  Receiver IR         Arduino
  V+             ->   +5v
  GND            ->   GND
  Signal         ->   Digital Pin 2
*/

#define maxLen 800
#define rxPinIR 2

volatile unsigned int irBuffer[maxLen];
volatile unsigned int x = 0;

void setup() {
  Serial.begin(115200);
  attachInterrupt(digitalPinToInterrupt(rxPinIR), rxIR_Interrupt_Handler, CHANGE);
  delay(500);
  Serial.print("Press a key (once) and wait...");
  Serial.println();
}

void loop() {

  delay(3000);

  if (x) {
    Serial.println();
    Serial.print(F("OK!"));
    Serial.println();
    Serial.println();
    delay(500);
    Serial.print(F("Below are coded "));
    Serial.print((x - 1));
    Serial.print(F(" [RAW] pulses: "));
    Serial.println();
    Serial.println();
    delay(2000);

    detachInterrupt(digitalPinToInterrupt(rxPinIR));

    for (int i = 1; i < x; i++) {

      if (!(i & 0x1)) {
        Serial.print(F("delayMicroseconds("));
      } else {
        Serial.print(F("pulseIR("));
      }
      Serial.print(irBuffer[i] - irBuffer[i - 1]);
      Serial.print(F(");"));
      Serial.println("");
    }
    x = 0;
    Serial.println("");
    Serial.println("Ready for another key...");

    attachInterrupt(digitalPinToInterrupt(rxPinIR), rxIR_Interrupt_Handler, CHANGE);
  }
}

void rxIR_Interrupt_Handler() {
  if (x > maxLen) return;
  irBuffer[x++] = micros();

}