Receiver

#include <RF22.h>
#include <RF22Router.h>

#define MY_ADDRESS 5
#define NODE_ADDRESS_1 12
#define NODE_ADDRESS_2 13
#define NODE_ADDRESS_3 14
RF22Router rf22(MY_ADDRESS);

int counter = 15;
int before = 0;
float start;
float start_2;

// LEDs
int pin1 = 4;
int pin2 = 5;
int pin3 = 6;

int pins[] = {pin1,pin2,pin3};

void setup() {

  pinMode(pin1, OUTPUT);
  pinMode(pin2, OUTPUT);
  pinMode(pin3, OUTPUT);


  Serial.begin(9600);
  if (!rf22.init())
    Serial.println("RF22 init failed");
  // Defaults after init are 434.0MHz, 0.05MHz AFC pull-in, modulation FSK_Rb2_4Fd36
  if (!rf22.setFrequency(431.0))
    Serial.println("setFrequency Fail");
  rf22.setTxPower(RF22_TXPOW_20DBM);
  //1,2,5,8,11,14,17,20 DBM
  rf22.setModemConfig(RF22::GFSK_Rb125Fd125);
  //modulation

  // Manually define the routes for this network
  rf22.addRouteTo(NODE_ADDRESS_1, NODE_ADDRESS_1);
  rf22.addRouteTo(NODE_ADDRESS_2, NODE_ADDRESS_2);
  rf22.addRouteTo(NODE_ADDRESS_3, NODE_ADDRESS_3);

}


void loop() {
  uint8_t buf[RF22_ROUTER_MAX_MESSAGE_LEN];
  char incoming[RF22_ROUTER_MAX_MESSAGE_LEN];
  memset(buf, '\0', RF22_ROUTER_MAX_MESSAGE_LEN);
  memset(incoming, '\0', RF22_ROUTER_MAX_MESSAGE_LEN);
  uint8_t len = sizeof(buf);
  uint8_t from;
  int received_value = 0;

  if (rf22.recvfromAck(buf, &len, &from))
  {
    buf[RF22_ROUTER_MAX_MESSAGE_LEN - 1] = '\0';
    memcpy(incoming, buf, RF22_ROUTER_MAX_MESSAGE_LEN);
    //Serial.print("got request from : ");
    //Serial.println(from, DEC);
    received_value = atoi((char*)incoming);
  }


    if(received_value == 0 && before == 0)
    {
      Serial.println("All Quiet");
    }
    else if(received_value == 0 && before != 0 && before != 3)
    {
      if(millis() - start >= 2000)
      {
        digitalWrite(pins[before-1], LOW);
        before = 0;
      }
    }
    else if(before == 3 && received_value == 0)
    {

      if(counter > 0) // if(millis()-start_2 <= 15000)
      {
        Serial.println(counter);
        counter--;
        digitalWrite(pin3, HIGH);
        delay(450);
        digitalWrite(pin3, LOW);
        delay(450);
      }

    }
    else if(received_value != 0)
    {
      start = millis();
      before = received_value;

      switch (before)
      {
        case 1:
          digitalWrite(pin1, HIGH);
          digitalWrite(pin2, LOW);
          digitalWrite(pin3, LOW);

          Serial.print("Level 1 reached! ");
          Serial.println(before);

          break;
        case 2:
          digitalWrite(pin1, LOW);
          digitalWrite(pin2, HIGH);
          digitalWrite(pin3, LOW);

          Serial.print("Level 2 reached! ");
          Serial.println(before);

          break;
        case 3:
          digitalWrite(pin1, LOW);
          digitalWrite(pin2, LOW);
          digitalWrite(pin3, HIGH);

          Serial.println("Level 3 reached!");
          Serial.println("Password requested. Countdown sequency started:");

          break;
        case 4:
          Serial.println("Password was given correct");

          digitalWrite(pin3, LOW);
          for(int i = 0; i < 200; i++){
             digitalWrite(pin1, HIGH);
             delay(50);
             digitalWrite(pin1, LOW);
             delay(50);
          }

          counter = 15;
          before = 0;
          delay(5000);
          break;
        case 5:
          Serial.println("Password was not given correctly!!! Police on the way");

          digitalWrite(pin3, LOW);
          for(int i = 0; i < 160; i++)
          {
            digitalWrite(pin1, HIGH);
            digitalWrite(pin2, HIGH);
            digitalWrite(pin3, HIGH);
            delay(50);
            digitalWrite(pin1, LOW);
            digitalWrite(pin2, LOW);
            digitalWrite(pin3, LOW);
            delay(50);
          }

          before = 0;
          delay(5000);
          break;
      }
    }
     delay(100);
  } //end of void loop()