Arduino Code

// #include <FirebaseESP8266.h>
#include <ESP8266WiFi.h>
#include <FirebaseArduino.h>
#include <Servo.h>

#define FIREBASE_HOST "smarthome-93c4c-default-rtdb.firebaseio.com" // Firebase host
#define FIREBASE_AUTH "gyIx0JsNZ5Iwuv87NIE2hMcrik2oG7akw5sqDOhl" //Firebase Auth code
#define WIFI_SSID "MobitelMashi" //Enter your wifi Name
#define WIFI_PASSWORD "MashiAmaA" // Enter your password

// Servo - gate
Servo myservo;
#define servoPin D0
#define servoSwitch D1
int servoPosition = 0;
int stepDelay = 15;

//Home Light
#define homeSwitch D2
#define homeLight D3

//Gaden Light
const int gardenLight = D4;
const int ldrPin = A0;

//Fire Alarm
const int fireLight = D5;
const int fireSensor = D6;

void setup() {
  Serial.begin(9600); //Serial Monitor
  // Servo Motor
  myservo.attach(servoPin);
  pinMode(servoSwitch, INPUT_PULLUP);
  myservo.write(servoPosition);

  //Home Light
pinMode(homeSwitch, INPUT_PULLUP);
pinMode(homeLight, OUTPUT);

//Gaden Light
pinMode(gardenLight, OUTPUT);
pinMode(ldrPin, INPUT);

//Fire Alarm
pinMode(fireLight, OUTPUT);
pinMode(fireSensor, INPUT);
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  Serial.print("Connecting");
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    delay(500);
  }
  Serial.println();
  Serial.println("Connected.");
  Serial.println(WiFi.localIP());
  Firebase.begin(FIREBASE_HOST, FIREBASE_AUTH);

//Set Initial value for variables
// Servo -Gate
  Firebase.setString("/SmartHome/Gate/servoStatus", "false");
  Firebase.setString("/SmartHome/Gate/gateIs", "CLOSE");

  // Home Light
  Firebase.setString("/SmartHome/Home/ledStatus", "false");
  Firebase.setString("/SmartHome/Home/homeLight", "OFF");

//Gaden Light
   Firebase.setString("/SmartHome/Garden/gardenLight", "OFF");
  //Fire Alarm
    Firebase.setString("/SmartHome/FireAlarm/fireLight", "OFF");

}

 
void loop() {

// Home Light Control
  bool swithchState = digitalRead(homeSwitch);
  String ledStatus = Firebase.getString("/SmartHome/Home/ledStatus");
  if(HomeSwitchChange(swithchState, ledStatus)){
    Serial.println("LED Status has changed");
    controlHomeLight(swithchState, ledStatus);
  }
// Servo Control
  bool servoSwitchState = digitalRead(servoSwitch);
  String servoStatus = Firebase.getString("/SmartHome/Gate/servoStatus");
  if (GateSwitchChange(servoSwitchState, servoStatus)) {
    Serial.println("Servo Status has changed");
    controlGate(servoSwitchState, servoStatus);
  }

    gardenLightControl();
     fireAlarmControl();
  
}

// Home Light Conrol Logic
bool HomeSwitchChange(bool currentSwitchState, String currentLedStatus){
  static bool previousSwitchState = false;
  static String previousLedStatus = "false";

  if (currentSwitchState != previousSwitchState || currentLedStatus != previousLedStatus) {
    // Status has changed
    previousSwitchState = currentSwitchState;
    previousLedStatus = currentLedStatus;
    return true;
  }
  return false;
}
void controlHomeLight(bool switchState, String ledStatus){
  
  Serial.println("Control Home Light:");
  Serial.println("    Switch State   : " + String(switchState));
  Serial.println("    Firebase State : " + String(ledStatus));

  if(switchState == 0){
    if(ledStatus == "false"){
      digitalWrite(homeLight, LOW);
      Firebase.setString("/SmartHome/Home/homeLight", "OFF");
    }
     else if(ledStatus == "true"){
      digitalWrite(homeLight, HIGH);
      Firebase.setString("/SmartHome/Home/homeLight", "ON");
    }
  } 
  else{
    if(ledStatus == "false"){
      digitalWrite(homeLight, HIGH);
      Firebase.setString("/SmartHome/Home/homeLight", "ON");
    } 
    else if(ledStatus == "true"){
      digitalWrite(homeLight, LOW);
      Firebase.setString("/SmartHome/Home/homeLight", "OFF");
    }
  }
}

//Garden Light Control Logic
void gardenLightControl(){
  int lightLevel = analogRead(ldrPin);
  Serial.println(lightLevel);
  if (lightLevel <75) {
    digitalWrite(gardenLight, HIGH);
    Firebase.setString("/SmartHome/Garden/gardenLight", "ON");
    Serial.println("Garden Light Turned ON");
  } 
  
  else {
    digitalWrite(gardenLight, LOW);
    Firebase.setString("/SmartHome/Garden/gardenLight", "OFF");
    Serial.println("Garden Light Turned OFF");
  }
  
}

//Fire Alarm Control Logic
void fireAlarmControl(){
int fireLevel = digitalRead(fireSensor);
  Serial.println(fireLevel);

  if (fireLevel == 0) {
    Serial.println("Fire Detected");
    Firebase.setString("/SmartHome/FireAlarm/fireLight", "ON");
    digitalWrite(fireLight, HIGH);
    delay(200);
    digitalWrite(fireLight, LOW);
    delay(200);

  } else {
    digitalWrite(fireLight, LOW);
Firebase.setString("/SmartHome/FireAlarm/fireLight", "OFF");
Serial.println("Fire Not Detected");
   
  }
}
 
 //Servo Motor Logic
bool GateSwitchChange(bool currentServoSwitchState, String currentServoStatus) {
  static bool previousServoSwitchState = false;
  static String previousServoStatus = "CLOSE";

  if (previousServoSwitchState != currentServoSwitchState || currentServoStatus != previousServoStatus) {
    // Status has changed
    previousServoSwitchState = currentServoSwitchState;
    previousServoStatus = currentServoStatus;
    return true;
  }
  return false;
}

void controlGate(bool servoSwitchState, String servoStatus) {
  Serial.println("Control Gate:");
  Serial.println("    Switch State   : " + String(servoSwitchState));
  Serial.println("    Firebase State : " + String(servoStatus));

  if (servoSwitchState == 0) {
    if (servoStatus == "false") {
      Firebase.setString("/SmartHome/Gate/gateIs", "OPEN");
      Serial.println("    Servo : OFF");
      servoRotate(90, 0);
    } 
    else if (servoStatus == "true"){
      Firebase.setString("/SmartHome/Gate/gateIs", "CLOSE");
      Serial.println("    Servo : ON");
      servoRotate(0, 90);
    }} 
  else {
    if (servoStatus == "false") {
      Firebase.setString("/SmartHome/Gate/gateIs", "CLOSE");
      Serial.println("    Servo : ON");
      servoRotate(0, 90);
    } 
    else if(servoStatus == "true") {
      Firebase.setString("/SmartHome/Gate/gateIs", "OPEN");
      Serial.println("    Servo : OFF");
      servoRotate(90, 0);
    }
  }}

// Servo rotation Logic
void servoRotate(int from, int to) {
  if (from < to) {
    for (int pos = from; pos <= to; pos++) {
      myservo.write(pos);
      delay(stepDelay);
    }
  } else {
    for (int pos = from; pos >= to; pos--) {
      myservo.write(pos);
      delay(stepDelay);
    }
  }
}