// channel id :2448746 
//channel api key :L767Q6YKB7TDQMLL


#include <WiFi.h>
#include "DHTesp.h"
#include "ThingSpeak.h"

const int DHT_PIN = 14;
const int LED_PIN = 12;
const int LPG_PIN = 36;
const int BUZZER_PIN = 13;
int gas;
const char* WIFI_NAME = "Wokwi-GUEST";
const char* WIFI_PASSWORD = "";
const int myChannelNumber = 2448746 ;
const char* myApiKey = "L767Q6YKB7TDQMLL";
const char* server = "api.thingspeak.com";

DHTesp dhtSensor;
WiFiClient client;

void setup() {
  Serial.begin(115200);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  pinMode(LED_PIN, OUTPUT);
  pinMode(BUZZER_PIN,OUTPUT);
  pinMode(LPG_PIN,INPUT);
  
  WiFi.begin(WIFI_NAME, WIFI_PASSWORD);
  while (WiFi.status() != WL_CONNECTED){
    delay(1000);
    Serial.println("Wifi not connected");
  }
  Serial.println("Wifi connected !");
  Serial.println("Local IP: " + String(WiFi.localIP()));
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);
}

void loop() {
  TempAndHumidity  data = dhtSensor.getTempAndHumidity();
  ThingSpeak.setField(1,data.temperature);
  ThingSpeak.setField(2,data.humidity);
  ThingSpeak.setField(3, gas);

  if (data.temperature > 35 || data.temperature < 12 || data.humidity > 70 || data.humidity < 40) {
    digitalWrite(LED_PIN, HIGH);
    digitalWrite(BUZZER_PIN,HIGH);
  }else{
    digitalWrite(LED_PIN, LOW);
  }
  
  int x = ThingSpeak.writeFields(myChannelNumber,myApiKey);
  
  Serial.println("Temp: " + String(data.temperature, 2) + "°C");
  Serial.println("Humidity: " + String(data.humidity, 1) + "%");
  Serial.printf("Gas: %d\n", gas);

  
  if(data.temperature>50){
    Serial.println("temperature over");
  
  
  }else{
    Serial.println("temperature low");
  }
gas = analogRead(LPG_PIN);
  if(gas>= 100){
    Serial.println("high gas value");
    digitalWrite(LED_PIN,HIGH);
    digitalWrite(BUZZER_PIN,HIGH);
    
  }
  else{
    digitalWrite(LED_PIN,LOW);
    digitalWrite(BUZZER_PIN,LOW);
  }
  Serial.println("---");

  delay(2000);
}