how to cancel out or ignore other ir signals

how block out other ir codes receiver accepts 1 signal not other?

i tried using else statement doesn't work example

} else {
        serial.println("ir signal received not recognized");
       

this program

#include <irremote.h>
#include <softwareserial.h>
#include <adafruit_neopixel.h>
#define pin 6

adafruit_neopixel strip = adafruit_neopixel(11 * 1, pin, neo_grb + neo_khz800);
irsend irsend;
softwareserial bt(0, 1); //tx, rx respetively
string readdata;
int vspeed = 100;
int recv_pin = 11;
irrecv irrecv(recv_pin);
decode_results results;
const int speakerpin   = 12;

int maxhealth          = 5;    // number of times can shot before dying
int myhealth           = maxhealth;
int deadtime           = 1000000000; // number of ms stay dead
int deathcount         = 0;

int hitstate           = high;
int lasthitstate       = high;

void setup() {
  bt.begin(9600);
  strip.begin();
  strip.show();
  serial.begin(9600);
  irrecv.enableirin();
  pinmode(9, output);
  pinmode(10, output);
  pinmode(5, output);
  pinmode(4, output);
  pinmode(speakerpin, output);
  colorwipe(strip.color(204, 0, 204), 10);

}
//-----------------------------------------------------------------------//
void loop(void) {
  while (bt.available()) { //check if there available byte read
    delay(10); //delay added make thing stable
    char c = bt.read(); //conduct serial read
    readdata += c; //build string- "forward", "reverse", "left" , "right"
  }
  if (readdata.length() > 0) {
    serial.println(readdata);


    if (readdata == "forward")
    {
      analogwrite(10, vspeed);
      analogwrite (9, low);
      analogwrite(5, vspeed);
      analogwrite(4, low);
      delay(100);
    }

    else if (readdata == "back")
    {
      analogwrite(10, low);
      analogwrite(9, vspeed);
      analogwrite(5, low);
      analogwrite(4, vspeed);
      delay(100);
    }

    else if (readdata == "right")
    {
      analogwrite (10, vspeed);
      analogwrite (9, low);
      analogwrite (5, low);
      analogwrite (4, low);
      delay (100);

    }

    else if ( readdata == "left")
    {
      analogwrite (10, low);
      analogwrite (9, high);
      analogwrite (5, vspeed);
      analogwrite (4, low);
      delay (100);
    }


    else if ( readdata == "reload")
    {
      rainbowcycle(5);
    }

    else if (readdata == "stop")
    {
      digitalwrite (10, low);
      digitalwrite (9, low);
      digitalwrite (5, low);
      digitalwrite (4, low);
      delay (100);
    }

    else if (readdata == "shoot")
    {
      irsend.sendnec(0x189710ef, 32);
      delay(40);
    }
    irrecv.enableirin();
    readdata = "";

  }

  //reset variable
  if (irrecv.decode(&results)) {
    serial.println(results.value, hex);

    if (results.value == 0xff30cf) {
      serial.println("hit");
      colorwipe(strip.color(255, 0, 0), 1); // red
      delay(100);
      colorwipe(strip.color(204, 0, 204), 10);
      myhealth--;
      if (myhealth <= 0) {
        serial.println("dead!");
        deathcount++;
        colorwipe(strip.color(255, 0, 0), 1);
        delay(deadtime);
        myhealth = maxhealth;
        serial.println("ready again!");

       
      } else {
        serial.println("ir signal received not recognized");
       
      }
     
      irrecv.resume(); // receive next value
     
    }
    delay(100);
  }
}
void colorwipe(uint32_t c, uint8_t wait) {
  (uint16_t = 0; < strip.numpixels(); i++) {
#ifdef debug
    serial.print("set pixel ");
    serial.print(i);
    serial.print(" of ");
    serial.print(strip.numpixels());
#endif
    strip.setpixelcolor(i, c);
#ifdef debug
    serial.println(" - ok");
#endif
    //delay(wait);
  }
  strip.show();
}

void rainbow(uint8_t wait) {
  uint16_t i, j;

  (j = 0; j < 256; j++) {
    (i = 0; < strip.numpixels(); i++) {
      strip.setpixelcolor(i, wheel((i + j) & 255));
    }
    strip.show();
    delay(wait);
  }
}

// different, makes rainbow equally distributed throughout
void rainbowcycle(uint8_t wait) {
  uint16_t i, j;

  (j = 0; j < 256 * 5; j++) { // 5 cycles of colors on wheel
    (i = 0; < strip.numpixels(); i++) {
      strip.setpixelcolor(i, wheel(((i * 256 / strip.numpixels()) + j) & 255));
    }
    strip.show();
    delay(wait);
  }
}

//theatre-style crawling lights.
void theaterchase(uint32_t c, uint8_t wait) {
  (int j = 0; j < 10; j++) { //do 10 cycles of chasing
    (int q = 0; q < 3; q++) {
      (int = 0; < strip.numpixels(); = + 3) {
        strip.setpixelcolor(i + q, c);  //turn every third pixel on
      }
      strip.show();

      delay(wait);

      (int = 0; < strip.numpixels(); = + 3) {
        strip.setpixelcolor(i + q, 0);      //turn every third pixel off
      }
    }
  }
}

//theatre-style crawling lights rainbow effect
void theaterchaserainbow(uint8_t wait) {
  (int j = 0; j < 256; j++) {   // cycle 256 colors in wheel
    (int q = 0; q < 3; q++) {
      (int = 0; < strip.numpixels(); = + 3) {
        strip.setpixelcolor(i + q, wheel( (i + j) % 255)); //turn every third pixel on
      }
      strip.show();

      delay(wait);

      (int = 0; < strip.numpixels(); = + 3) {
        strip.setpixelcolor(i + q, 0);      //turn every third pixel off
      }
    }
  }
}

// input value 0 255 color value.
// colours transition r - g - b - r.
uint32_t wheel(byte wheelpos) {
  if (wheelpos < 85) {
    return strip.color(wheelpos * 3, 255 - wheelpos * 3, 0);
  } else if (wheelpos < 170) {
    wheelpos -= 85;
    return strip.color(255 - wheelpos * 3, 0, wheelpos * 3);
  } else {
    wheelpos -= 170;
    return strip.color(0, wheelpos * 3, 255 - wheelpos * 3);
  }
}

i solved it.

add irresume code higher receive loop

Arduino Forum > Using Arduino > Programming Questions > how to cancel out or ignore other ir signals

arduino