RF433 is receiving an outside signal?

Question

Arduino

RF433 receiver gives out a sequence of bytes, although I am not transmitting anything, perhaps some wireless neighbors transmitters are clogging the air, but how can I find out what it is?
Connected according to this scheme:

/*

  Example for receiving
  
  http://code.google.com/p/rc-switch/
  
  If you want to visualize a telegram copy the raw data and 
  paste it into http://test.sui.li/oszi/
  
  Need help? http://forum.ardumote.com
  
  Edited by hack.lenotta  to force it receive to ‘everything’ 
  and included all the files at once.
  http://hack.lenotta.com
*/

#include <RCSwitch.h>
// Format the output:

void output(unsigned long decimal, unsigned int length, unsigned int 
delay, unsigned int* raw, unsigned int protocol) {

  if (decimal == 0) {
    Serial.print("Unknown encoding.");
  } else {
    char* b = dec2binWzerofill(decimal, length);
    Serial.print("Decimal: ");
    Serial.print(decimal);
    Serial.print(" (");
    Serial.print( length );
    Serial.print("Bit) Binary: ");
    Serial.print( b );
    Serial.print(" Tri-State: ");
    Serial.print( bin2tristate( b) );
    Serial.print(" PulseLength: ");
    Serial.print(delay);
    Serial.print(" microseconds");
    Serial.print(" Protocol: ");
    Serial.println(protocol);
  }
  
  Serial.print("Raw data: ");
  for (int i=0; i<= length*2; i++) {
    Serial.print(raw[i]);
    Serial.print(",");
  }
  Serial.println();
  Serial.println();
}


static char* bin2tristate(char* bin) {
  char returnValue[50];
  int pos = 0;
  int pos2 = 0;
  while (bin[pos] != ' ' && bin[pos+1] != ' ') {
    if (bin[pos]=='0' && bin[pos+1]=='0') {
      returnValue[pos2] = '0';
    } else if (bin[pos]=='1' && bin[pos+1]=='1') {
      returnValue[pos2] = '1';
    } else if (bin[pos]=='0' && bin[pos+1]=='1') {
      returnValue[pos2] = 'F';
    } else {
      return "not applicable";
    }
    pos = pos+2;
    pos2++;
  }
  returnValue[pos2] = ' ';
  return returnValue;
}

// Make some conversions:

static char * dec2binWzerofill(unsigned long Dec, unsigned int 
bitLength){
  static char bin[64]; 
  unsigned int i=0;

  while (Dec > 0) {
    bin[32+i++] = (Dec & 1 > 0) ? '1' : '0';
    Dec = Dec >> 1;
  }

  for (unsigned int j = 0; j< bitLength; j++) {
    if (j >= bitLength - i) {
      bin[j] = bin[ 31 + i - (j - (bitLength - i)) ];
    }else {
      bin[j] = '0';
    }
  }
  bin[bitLength] = ' ';
  
  return bin;
}

//The edited code to force recevining data:

RCSwitch mySwitch = RCSwitch();

void setup() {
  Serial.begin(9600);
  mySwitch.enableReceive(0);  // Receiver on inerrupt 0 => that is 
pin #2
}

void loop() {
    output(mySwitch.getReceivedValue(), mySwitch.getReceivedBitlength(),
 mySwitch.getReceivedDelay(), 
mySwitch.getReceivedRawdata(),mySwitch.getReceivedProtocol());
    mySwitch.resetAvailable();
  
}

Answer 1

Do not be offended, but you have chosen the most primitive, most unreliable, most unprotected receiver on the most popular frequency and now you are asking how to work with it? Throw it away, it's better for everyone.
Well, light Google says:
roboforum.ru/forum11/topic10763.html?style=9
easyelectronics.ru/radiomoduli-hoperf-hm-r433-i-hm...
https://geektimes.ru/post/253954/ - here Di Halt offers options that are worth using

Answer 2

433 has a huge pile of radio
junk - LPD
radios
- car alarms - key fobs -
weather stations
And much more. If you want to find a source - buy a radio scanner and good luck to you.