// Defining the information to connect with Blynk cloud
#define BLYNK_TEMPLATE_ID "TMPL6lgigtVK5"
#define BLYNK_TEMPLATE_NAME "IR Flame Sensor and MQ2"
#define BLYNK_AUTH_TOKEN "pNZy9B_hKToRupbz7Ggqjz3oBJjsGsk3"

// Import all the libraries
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

// Authentification information with Blynk and Wokwi WiFi
char auth[] = "pNZy9B_hKToRupbz7Ggqjz3oBJjsGsk3";
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

// Define pin variables
const int mq2Pin = 33;
const int irflamePin = 13;
const int buzzerPin = 16;
const int alertLampPin = 4;

// Create variables with initial value
int gasValue = 0;
bool buzzerState = 0;
bool alertlampState = 0;
bool irflameState = 0;
String gasCondition = "";
String fireCondition = "";

// This function creates the timer object. It's part of Blynk library 
BlynkTimer timer; 

void sendSensor() {
  // This function describes data sensor send to Blynk cloud each timer tick
  
  // Condition for gas concetrate high/danger or close fire detected
  if (gasValue > 40 || irflameState == 0) {
    digitalWrite(buzzerPin, HIGH);
    tone(buzzerPin, 200);
    digitalWrite(alertLampPin, HIGH);
    buzzerState = 1;
    alertlampState = 1;
  }
  else {
    digitalWrite(buzzerPin, LOW);
    noTone(buzzerPin);
    digitalWrite(alertLampPin, LOW);
    buzzerState = 0;
    alertlampState = 0;
  }

  // Condition for gas concetrate and fire detected notification in string
  gasCondition = (gasValue > 40) ? "Warning! Gas Concetrate High" : "Gas Concetrate Low";
  fireCondition = (irflameState == 0) ? "Warning! close Fire Detected" : "No Fire Detected";

  // Print to serial
  Serial.print("Gas value = ");
  Serial.print(gasValue);
  Serial.print(" ppm");
  Serial.print(" || IR Flame state = ");
  Serial.println(irflameState);
  Serial.print(gasCondition);
  Serial.print(" || ");
  Serial.println(fireCondition);


  Blynk.virtualWrite(V0, gasValue);
  Blynk.virtualWrite(V1, alertlampState);
  Blynk.virtualWrite(V2, buzzerState);
  Blynk.virtualWrite(V3, fireCondition);
  Blynk.virtualWrite(V4, gasCondition);
}

void setup() {
  Serial.begin(115200);

  // Configure used pin
  pinMode(mq2Pin, INPUT); // Input pin for MQ2 sensor
  pinMode(irflamePin, INPUT); // Input pin for IR Flame sensor
  pinMode(buzzerPin, OUTPUT); // Output pin for buzzer
  pinMode(alertLampPin, OUTPUT); // Output pin for alert lamp/ led

  Blynk.begin(auth, ssid, pass);  // Connect to Blynk cloud
  // Setting interval to send data to Blynk Cloud to 1000ms (1 second).
  timer.setInterval(1000L, sendSensor);
}

void loop() {
  // Read in analog value. Range 0-4095 mapping to 0-100 --> if <=40 gas concetrate low/good (ppm), else >40 gas concetrate high/danger (ppm)
  gasValue = map(analogRead(mq2Pin), 0, 4095, 0, 100);
  
  // Read in digital value. Range 0-1 --> if 0/LOW close fire detected, else 1/HIGH no close fire detected
  // In Wokwi simulation range is 0-100 lux --> if >=100 (0/LOW) close fire detected, else <100 (1/HIGH) no close fire detected
  irflameState = digitalRead(irflamePin);

  // Runs all Blynk stuff
  Blynk.run(); 
  // runs BlynkTimer
  timer.run(); 

  tone(buzzerPin, 200);
}