Control Led-Strip with Arduino and 433mhz modul

I want to make a controller for 2 WS21812B Strips with a Arduino Nano. I want to send data to the Arduino with the Computer or my phone to change colors or effects, but the arduino doesn’t receive any data. Only if I comment out the effects the arduino receive messages.

#include <RCSwitch.h>

RCSwitch mySwitch = RCSwitch();

#include "FastLED.h"

byte NUM_LEDS[2] = {50, 53};
#define LED_DATA_PIN 3

#define BRIGHTNESS 255

CRGB leds[2][53];


// Filler animation attributes
CRGBPalette16 currentPalette = RainbowColors_p;
TBlendType    currentBlending = LINEARBLEND;
uint8_t startIndex = 0;
int rt = 0, gr = 0, bl = 0, le = 3, de  = 15, rt1 = 0, gr1 = 0, bl1 = 0, le1 = 3, de1  = 15;
byte mode = 0, mode1 = 0;
void setup()
{
  Serial.begin(9600);
  FastLED.addLeds<WS2812B, LED_DATA_PIN, GRB>(leds[0], NUM_LEDS[0]);
  FastLED.addLeds<WS2812B, 6, GRB>(leds[1], NUM_LEDS[1]);
  FastLED.setBrightness(BRIGHTNESS);
  pinMode(5, OUTPUT);
  analogWrite(5, 255);
  mySwitch.enableReceive(0);  // Empfänger ist an Interrupt-Pin "0" - Das ist am UNO der Pin2
  FastLED.clear(true);
}

void loop() {
  empf();
  fade(0);
  /*if(mode == 11){
    analogWrite(5,0);
    }else if(mode == 0){*/
  /*}else if(mode == 1){
    fillpallet(0);
    }else if(mode == 2){
    cylon(rt,gr,bl,le,de,0);
    }else if(mode == 10){
    ledsoff(0);
    }*/
}
void cylon(int red, int green, int blue, int leng, int del, int strip) {
  static int stri;
  static bool set;
  static int for1;
  static int fb;
  if (set && stri != strip) {
    for1 = 0;
    stri = strip;
    fb = 0;
  }
  if (set == false) {
    stri = strip;
    set = true;
  }
  unsigned long t = del;
  static unsigned long _ETimer;
  if ( millis() - _ETimer >= (t)) {
    _ETimer += (t);
    if (for1 == NUM_LEDS[strip]) {
      for1--;
      fb = 1;
    } else if (for1 == 0) {
      fb = 0;
    }
    if (fb == 1) {
      for1--;
    } else {
      for1++;
    }
  }
  for (int l = 0; l < leng; l++) {
    if (for1 + l <= NUM_LEDS[strip]) {
      leds[strip][for1 + l] = CRGB(red, green, blue);
    }
  }
  FastLED.show();
  for (int l = 0; l < leng; l++) {
    if (for1 + l <= NUM_LEDS[strip]) {
      leds[strip][for1 + l] = CRGB(0, 0, 0);
    }
  }
}
void ledson(int red, int green, int blue, int strip) {
  for (byte i = 0; i < NUM_LEDS[strip]; i++) {
    leds[strip][i] = CRGB(red, green, blue);
  }
  FastLED.show();
}
void ledsoff(byte strip) {
  for (byte i = 0; i < NUM_LEDS[strip]; i++) {
    leds[strip][i] = CRGB(0, 0, 0);
  }
  FastLED.show();
}
int r = 255;
int g = 0;
int b = 0;
void fade(int zahl) {
  unsigned long t = 20;
  static unsigned long _ETimer;
  if ( millis() - _ETimer >= (t)) {
    _ETimer += (t);
    for (int i = 0; i < NUM_LEDS[zahl]; i++) {
      leds[zahl][i] = CRGB(r, g, b);
    }
    FastLED.show();
    if (r > 0 && b == 0) {
      r--;
      g++;
    }
    if (g > 0 && r == 0) {
      g--;
      b++;
    }
    if (b > 0 && g == 0) {
      r++;
      b--;
    }

  }

}
void fillpallet(int zahl) {
  unsigned long t = 15;
  static unsigned long _ETimer;
  if ( millis() - _ETimer >= (t)) {
    _ETimer += (t);

    startIndex++; // speed

    uint8_t colorIndex = startIndex;
    for ( int i = 0; i < NUM_LEDS[zahl]; i++) {
      leds[zahl][i] = ColorFromPalette(currentPalette, colorIndex, BRIGHTNESS, currentBlending);
      colorIndex += 3;
    }
    FastLED.show();
  }
}
void empf() {
  if (mySwitch.available()) // Wenn ein Code Empfangen wird...
  {
    Serial.println("ab");
    int value = mySwitch.getReceivedValue(); // Empfangene Daten werden unter der Variable "value" gespeichert.
    //Serial.println(value);
    if (value == 0) // Wenn die Empfangenen Daten "0" sind, wird "Unbekannter Code" angezeigt.
    {
      Serial.println("Unbekannter Code");
    }

    else // Wenn der Empfangene Code brauchbar ist, wird er hier an den Serial Monitor gesendet.
    {
      if (value > 99 && value < 140) {
        String s = String(value);
        char c[3];
        s.toCharArray(c, 4);
        Serial.println("test");
        if (c[1] == '1') {
          if (c[2] == '0') {
            mode = 10;
          } else if (c[2] == '1') {
            mode = 0;
          } else if (c[2] == '2') {
            mode = 1;
          } else if (c[2] == '3') {
            mode = 2;
          }
        } else if (c[1] == '2') {
          if (c[2] == '0') {
            mode1 = 10;
          } else if (c[2] == '1') {
            mode1 = 0;
          } else if (c[2] == '2') {
            mode1 = 1;
          } else if (c[2] == '3') {
            mode1 = 2;
          }
        } else if (c[1] == '3') {
          if (c[2] == '0') {
            mode = 11;
          } else if (c[2] == '1') {
            mode = 0;
            mode1 = 0;
          } else if (c[2] == '2') {
            mode = 1;
            mode1 = 1;
          } else if (c[2] == '3') {
            mode = 1;
            mode1 = 1;
          }
        }
      }
      if (value > 99999 && value < 130000) {
        String s = "" + value;
        char c[6];
        s.toCharArray(c, 6);
        if (c[1] == '1') {
          if (c[2] == '1') {
            rt = c[3] + c[4] + c[5] + 0;
          } else if (c[2] == '2') {
            gr  = c[3] + c[4] + c[5] + 0;
          } else if (c[2] == '3') {
            bl = c[3] + c[4] + c[5] + 0;
          } else if (c[2] == '4') {
            de = c[3] + c[4] + c[5] + 0;
          } else if (c[2] == '5') {
            le = c[3] + c[4] + c[5] + 0;
          }
        } else if (c[1] == '2') {
          if (c[2] == '1') {
            rt1 = c[3] + c[4] + c[5] + 0;
          } else if (c[2] == '2') {
            gr1  = c[3] + c[4] + c[5] + 0;
          } else if (c[2] == '3') {
            bl1 = c[3] + c[4] + c[5] + 0;
          } else if (c[2] == '4') {
            de1 = c[3] + c[4] + c[5] + 0;
          } else if (c[2] == '5') {
            le1 = c[3] + c[4] + c[5] + 0;
          }
        }
      }
    }

    mySwitch.resetAvailable(); // Hier wird der Empfänger "resettet"
  }
}

Your computer nor smartphone has 433 MHz module. Keep that in mind.

You should make sure the FastLED example works, before going on your own for which it is obvious you are ill-equipped.

.

I know my Computer or Phone hasnt a 433mhz modul. The effects work, but when the effects work, I can't receive any data with the 433mhz Modul

If you don't have a 433 MHz module to transmit, how are you suppose to receive?

I am confused.

.

I have two Arduinos, one has a transmitter and one has a receiver. First I want to try to control the Arduino with another Arduino, then I will replace the Arduino with a Raspberry pi. And with a local server I can communicate with my phone. But the problem is that i cant control it with another Arduino. It only receives data when the Arduino doesnt do anything else. If I start a effect, it is to slow to receive data