#include <DHTesp.h>
#include <WiFi.h>
#include <LiquidCrystal_I2C.h>
#include <WiFiClient.h>
#include <ThingSpeak.h>

#define LDR_PIN 35
#define sensor 34
#define buzzer 2

int ldrvalue;
int value;
DHTesp dhtSensor;
TempAndHumidity data;
const int dhtpin = 15;

//Initialize the LCD display
LiquidCrystal_I2C lcd(0x27, 16, 3);

//Enter your WIFI SSID and password
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

WiFiClient client;
unsigned long myChannelNumber = 2516347;
const char *myWriteAPIKey = "MAX8N1DS8BVMYG30";
int statusCode;

void setup() {
  // Debug console
  Serial.begin(115200);
  dhtSensor.setup(dhtpin, DHTesp::DHT22);
  lcd.init();
  lcd.backlight();
  pinMode(buzzer, OUTPUT);
  pinMode(LDR_PIN, INPUT);
  ThingSpeak.begin(client);
  
  WiFi.mode(WIFI_STA);
  delay(1000);
  lcd.setCursor(1, 0);
  // lcd.print("Gas Detector");
  // for (int a = 0; a <= 15; a++) {
  //   lcd.setCursor(a, 1);
  //   lcd.print(".");
  //   delay(200);
  }
  lcd.clear();
}

// //Get the ultrasonic sensor values
// void GASLevel() {
//   value = analogRead(sensor);
//   value = map(value, 0, 4095, 0, 100);

//   if (value >= 40) {
//     digitalWrite(buzzer, HIGH);
//     tone(buzzer, 200);
//     lcd.setCursor(13, 0);
//     lcd.print("Warning");
//   } 
//   else {
//     digitalWrite(buzzer, LOW);
//     noTone(buzzer);
//     lcd.setCursor(13,0);
//     lcd.print("Normal ");
//   }
//   lcd.setCursor(0, 0);
//   lcd.print("GAS Level:");
//   lcd.print(value);
//   lcd.print(" ");
// }

void dht(){
  lcd.setCursor(0,2);
  lcd.print("Humi:"+ String(data.temperature)+"%");
  lcd.setCursor(0,3);
  lcd.print("Temp:"+ String(data.humidity)+"oC");

}
void ldr(){
  ldrvalue = analogRead(LDR_PIN);
  lcd.setCursor(0,1);
  lcd.print("LDR:"+ String(ldrvalue));
}
void loop() {
   if (WiFi.status() != WL_CONNECTED) {
    Serial.print("Attempting to connect...");
    while (WiFi.status() != WL_CONNECTED) {
      WiFi.begin(ssid, pass);
      Serial.print(".");
     delay(5000);
    }
    Serial.println("\nConnected");
  }
 // GASLevel();
  dht();
  ldr();
  delay(2000);
   data = dhtSensor.getTempAndHumidity();
     Serial.println("Humi:" + String(data.temperature)+"%");
     Serial.println("Temp:" + String(data.humidity)+" oC");
    // Serial.println("Gas:" + String(value));
    Serial.println("LDR:" + String(ldrvalue)+"lux");
     Serial.println("<-------------------->");
    ThingSpeak.setField(1, data.temperature);
    ThingSpeak.setField(2, data.humidity);
    ThingSpeak.setField(3, value);
    ThingSpeak.setField(4, ldrvalue);
    statusCode = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
}