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

const int DHT_PIN = 15;
const int buzzer = 2;
const int LED1 = 25;
const int LED2 = 26;
const int LED3 = 27;


// esp32 wifi parameters
const char* WIFI_NAME = "Wokwi-GUEST";
const char* WIFI_PASSWORD = "";
const int myChannelNumber = 2308820; //thingspeak channel ID
const char* myApiKey = "2TPP3XJSEVKRQ2PK"; //write API key from ThingSpeak
const char* server = "api.thingspeak.com";


DHTesp dhtSensor;
WiFiClient client;

LiquidCrystal_I2C lcd(0x27,20,4); //setting LCD address

void setup() 
{
  lcd.init(); //initialize LCD 
  lcd.backlight(); //brightness for LCD
  
  // initialize DHT22, led's, and the buzzer
  Serial.begin(115200);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
 pinMode(LED1, OUTPUT);
 pinMode(LED2, OUTPUT);
 pinMode(LED3, OUTPUT);
 pinMode(buzzer, OUTPUT);

  
  //esp32 module code
  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() {
  //sensor code
  TempAndHumidity  data = dhtSensor.getTempAndHumidity();
  ThingSpeak.setField(1,data.temperature);
  ThingSpeak.setField(2,data.humidity);

 // led code for water detection
  if (data.humidity > 90 ) { 
    digitalWrite(LED1, HIGH);
    tone(buzzer, 35);
    digitalWrite(buzzer, HIGH);
  }else{
    digitalWrite(LED1, LOW);
  }

  if (data.humidity > 40 && data.humidity < 90) {
    digitalWrite(LED2, HIGH);
  }else{
    digitalWrite(LED2, LOW);
  }

   if (data.humidity < 40 ) {
    digitalWrite(LED3, HIGH);
  }else{
    digitalWrite(LED3, LOW);
  }
  

  //Thingspeak code
  int x = ThingSpeak.writeFields(myChannelNumber,myApiKey);
  
  //lcd monitor code
  Serial.println("Temp: " + String(data.temperature, 2) + "°C");
  Serial.println("Humidity: " + String(data.humidity, 1) + "%");
  lcd.setCursor(1,0);
  lcd.print("T:");
  lcd.print(data.temperature);
  lcd.setCursor(2,1);
  lcd.print("H:");
  lcd.print(data.humidity);
  
  if(x == 200){
    Serial.println("Data pushed successfull");
  }else{
    Serial.println("Push error" + String(x));
  }
  
  Serial.println("---");

  delay(10000);
}