#include <WiFi.h>
#include <HTTPClient.h>
#include <DHT.h>
#include <LiquidCrystal_I2C.h>
#define LED 2
#define SOUND_SPEED 0.034

const int DHTPIN = 15;
const int trigPin = 5;
const int echoPin = 18;
const int buzzerPin = 14;

const char ssid[] = "Wokwi-GUEST";
const char password[] = "";

long lastTime = 0;
long timerDelay = 500;
//HC-SR
long duration;
float distance;

String serverName = "https://api.thingspeak.com/update?api_key=SVJYEIK2CIDRPHX4&field1=0";

float hum;
float temp;

DHT dht(DHTPIN, DHT22);
LiquidCrystal_I2C lcd (0x27, 16,2);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED){
    delay(500);
    Serial.print('-');
  }

  Serial.println("");
  Serial.print("ESP 32 connected");
  Serial.println(WiFi.localIP());
  dht.begin();

  //LCD
  lcd.init ();
  lcd.backlight ();

  //LED
  pinMode(LED, OUTPUT);

  //HC-SR04
  pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
  pinMode(echoPin, INPUT);

  //Servo
  pinMode(buzzerPin, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  if((millis() - lastTime) > timerDelay ){
    if(WiFi.status() == WL_CONNECTED){
      //Read Sensor
    hum = dht.readHumidity();
    temp = dht.readTemperature();
    lcd.setCursor(0, 0);
    lcd.print("H:");
    lcd.print(hum);
    lcd.setCursor(8, 0);
    lcd.print("T:");
    lcd.print(temp);
      if (hum > 60 && temp > 60){
        digitalWrite(LED, HIGH);
      }else{
        digitalWrite(LED, LOW);
      }
    digitalWrite(trigPin, LOW);
    delayMicroseconds(2);
    digitalWrite(trigPin, HIGH);
    delayMicroseconds(10);
    digitalWrite(trigPin, LOW);
    duration = pulseIn(echoPin, HIGH);
    distance = duration * SOUND_SPEED/2;
    lcd.setCursor(0, 1);
    lcd.print("Distance:");
    lcd.print(distance);
      if (distance < 200){
        digitalWrite(buzzerPin, HIGH);
      }else{
        digitalWrite(buzzerPin, LOW);
      }
    sendData(hum, temp, distance);
    }
    else {
      Serial.println("WiFi Disconected");
    }
    lastTime = millis();
  }
}

void sendData(int temp, int hum, int distance) {
  HTTPClient http; //Inisialisasi HTTP Client

  String url = serverName + "&field1=" + temp + "&field2=" + hum + "&field3=" + distance;

  http.begin(url.c_str()); // Send HTTP Request / Inisialisasi
  int httpResponseCode = http.GET(); // Check status data

  if (httpResponseCode > 0){
    Serial.print("HTTP REsponse code:");
    Serial.println(httpResponseCode);
  }
  else{
    Serial.print("Error Code");
    Serial.println(httpResponseCode);
  }
  http.end();
}