433MHz Transceiver

#include <RCSwitch.h>

RCSwitch mySwitch = RCSwitch();
String inString = "";

void setup() {
  Serial.begin(9600);
  mySwitch.enableReceive(0);
  mySwitch.enableTransmit(6);
  pinMode(LED_BUILTIN, OUTPUT);
  Serial.println("Doomsday Machine ONLINE!...");
}

void loop() {
  if (mySwitch.available()) {
    int value = mySwitch.getReceivedValue();
    if (value == 0) {
      Serial.println("Unknown encoding");
    } else {
        Serial.println( mySwitch.getReceivedValue() );
        digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
        blinker();
    }
    mySwitch.resetAvailable();

}

  // Read serial input:
  while (Serial.available() > 0) {
    int inChar = Serial.read();
    if (isDigit(inChar)) {
      inString += (char)inChar;
    }
    if (inChar == '#') {
      long code = inString.toInt();
      mySwitch.send(code, 24);
      blinker();
      Serial.println(code);
      inString = "";
    }
  }

  delay(10);
}


void blinker() {
        digitalWrite(LED_BUILTIN, HIGH);
        delay(30);
        digitalWrite(LED_BUILTIN, LOW);
        delay(30);
        digitalWrite(LED_BUILTIN, HIGH);
        delay(30);
        digitalWrite(LED_BUILTIN, LOW);
        delay(30);
}