#include "arduino_secrets.h" 

#include "thingProperties.h" 
int gas_data=34; 
int flame_data=35; 

int Alarm=32;
int relay=33;
void setup() { 

  Serial.begin(9600); 
 
  delay(1500);  
  pinMode(gas_data,INPUT); 
   pinMode(flame_data,INPUT);
   pinMode(Alarm,OUTPUT); 
   pinMode(relay,OUTPUT);
  // Defined in thingProperties.h 
  initProperties(); 
  // Connect to Arduino IoT Cloud 
  ArduinoCloud.begin(ArduinoIoTPreferredConnection); 
 
  setDebugMessageLevel(2); 
  ArduinoCloud.printDebugInfo(); 
} 

void loop() { 
  ArduinoCloud.update(); 
  // Your code here  
  gas=analogRead(gas_data); 
  flame=digitalRead(flame_data); 
  if(gas>200){
    digitalWrite(Alarm,HIGH);
    delay(5000);
  }
  else if(flame<1){
    digitalWrite(relay,HIGH);
    delay(5000);
    digitalWrite(relay,LOW);
  }
  else{
    digitalWrite(Alarm,LOW);
    digitalWrite(relay,LOW);
   
  }
} 

void onGasChange()  { 
 
} 

void onFlameChange()  { 
  
} 

thingProperties.h

#include <ArduinoIoTCloud.h> 

#include <Arduino_ConnectionHandler.h> 

 

const char DEVICE_LOGIN_NAME[]  = "";your device name(device ID) 

 

const char SSID[]               = SECRET_SSID;    // Network SSID (name) 

const char PASS[]               = SECRET_OPTIONAL_PASS;    // Network password (use for WPA, or use as key for WEP) 

const char DEVICE_KEY[]  = SECRET_DEVICE_KEY;    // Secret device password 

 

void onFlameChange(); 

void onGasChange(); 

 

int flame; 

int gas; 

 

void initProperties(){ 

 

  ArduinoCloud.setBoardId(DEVICE_LOGIN_NAME); 

  ArduinoCloud.setSecretDeviceKey(DEVICE_KEY); 

  ArduinoCloud.addProperty(flame, READWRITE, ON_CHANGE, onFlameChange); 

  ArduinoCloud.addProperty(gas, READWRITE, ON_CHANGE, onGasChange); 

 

} 

 

WiFiConnectionHandler ArduinoIoTPreferredConnection(SSID, PASS); 

arduino_secrets.h

#define SECRET_SSID "" // your Network SSID (name) 

#define SECRET_OPTIONAL_PASS ""  // your Network password (use for WPA, or use as key for WEP) 

#define SECRET_DEVICE_KEY "" // Secret device password 

Libraries

If Arduino cloud is used for uploading code Arduino cloud agent will download all necessary libraries automatically 

If not  

Download  

Necessary Libraries from Library manager of Arduino IDE 

And make sure Arduino create agent for cloud is paused when   code is upload in board from Arduino IDE 

Same goes for Arduino cloud if code is uploading from Arduino cloud make sure Arduino IDE is closed.