#include <ESP32Servo.h> 
#include <LiquidCrystal_I2C.h>
#include "DHTesp.h"
#include <WiFi.h>
#include <ThingSpeak.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

const char* ssid = "Wokwi-GUEST";
const char* pass = "";
WiFiClient client;

unsigned long myChannelNumber = 2364403;
const char* myWriteAPIKey = "O0P6WSY0TCQZB0WU";
const char* server = "api.thingspeak.com";

unsigned long lastTime = 0;
unsigned long timerDelay = 30000;




// Pin yang digunakan
const int pinTrigger = 4;
const int pinEcho = 5;
const int servoPin = 15;
const int pinTemp = 19;
const int ledPin = 13;
const int buzzPin = 12;
float tempC;
Servo servo;
DHTesp dhtSensor;

// I/O yang digunakan
void setup() 
{
  Serial.begin (9600);      
  pinMode(pinTrigger, OUTPUT); 
  pinMode(pinEcho, INPUT);
  pinMode(ledPin,OUTPUT);
  pinMode(buzzPin, OUTPUT);
  dhtSensor.setup(pinTemp, DHTesp::DHT22);
  servo.attach(servoPin);


  WiFi.begin(ssid,pass);
  while(WiFi.status()!= WL_CONNECTED)
  {
    delay(100);
    Serial.println(".");
  }
  Serial.println("WiFi Connected!");
  Serial.println(WiFi.localIP());
  
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);

}


// Konversi Sensor Ultrasonic ke CM
float ultrasonic() 
{
  digitalWrite(pinTrigger, LOW);
  delayMicroseconds(2);
  digitalWrite(pinTrigger, HIGH);
  delayMicroseconds(10);
  digitalWrite(pinTrigger, LOW);

  int duration = pulseIn(pinEcho, HIGH);
  float dist_cm = duration * 0.034 / 2;
  return dist_cm;

}
void loop() 
{
  // DHT22 Sensor
  tempC = dhtSensor.getTemperature();
  Serial.print("Temperature(C) : ");
  Serial.println(tempC);
  
  // Menampilkan data DHT22 Ke LCD
  lcd.init();
  lcd.backlight();
  lcd.setCursor(1, 0);
  lcd.print("Suhu :");
  lcd.print(tempC);
  
  // Fungsi if untuk sensor ultrasonic
  float jarakManusia = ultrasonic();
  Serial.print("Jarak Manusia (Cm) : ");
  Serial.print(jarakManusia);
  if(jarakManusia<50){
    if(tempC > 36){
      servo.write(00);
      digitalWrite(ledPin, HIGH);
      tone(buzzPin, HIGH);
      }
    else{
      servo.write(90); 
      digitalWrite(ledPin, LOW);
      noTone(buzzPin);

    }
    
  }
  ThingSpeak.setField(1,tempC);
  ThingSpeak.setField(2,jarakManusia);

  int x = ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);
  if (x == 200)
  {
    Serial.println("Channel update succesful");
  }
  else
  {
    Serial.println("Problem updating channel");
  }
  
  delay(10); // this speeds up the simulation
}