#include <Wire.h>
#include <WiFi.h>
#include "UbidotsEsp32Mqtt.h"
#include <DHT.h>
#include <LiquidCrystal_I2C.h>

#define DHTPIN 15       // Pin connected to the DHT22 sensor
#define DHTTYPE DHT22   // Define sensor type as DHT22
#define TRIG_PIN 5      // Pin for ultrasonic sensor Trig
#define ECHO_PIN 18     // Pin for ultrasonic sensor Echo
#define LED_PIN 27       // LED connected to pin 27

/****************************************
 * Define Constants
 ****************************************/
const char *UBIDOTS_TOKEN = "BBUS-YXxJXOlmJRol9qYEZeIy9BHkQuFTQ8";  // Put here your Ubidots TOKEN
const char *WIFI_SSID = "Wokwi-GUEST";      // Put here your Wi-Fi SSID
const char *WIFI_PASS = "";      // Put here your Wi-Fi password
const char *DEVICE_LABEL = "esp32";   // Put here your Device label to which data  will be published
const char *VARIABLE_LABEL = "Suhu dan Kelembaban"; // Put here your Variable label to which data  will be published
const int lcdAddress = 0x27;

const int PUBLISH_FREQUENCY = 2000; // Update rate in milliseconds

unsigned long timer;
uint8_t analogPin = 34; // Pin used to read data from GPIO34 ADC_CH6.
uint8_t PinLed = 27;
uint8_t conta = 0;

Ubidots ubidots(UBIDOTS_TOKEN);
DHT dht(DHTPIN, DHTTYPE); // Tambahkan objek DHT di sini
LiquidCrystal_I2C lcd(lcdAddress, 16, 2); // Inisialisasi LCD I2C (16x2 karakter)

/****************************************
 * Auxiliar Functions
 ****************************************/
void callback(char *topic, byte *payload, unsigned int length)
{
  Serial.print("Message arrived [");
  Serial.print(topic);
  Serial.print("] ");
  for (int i = 0; i < length; i++)
  {
    Serial.print((char)payload[i]);
  }
  Serial.println();
}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  // ubidots.setDebug(true); // uncomment this to make debug messages available
  ubidots.connectToWifi(WIFI_SSID, WIFI_PASS);
  ubidots.setCallback(callback);
  ubidots.setup();
  ubidots.reconnect();
  pinMode(PinLed, OUTPUT);
 
  // Inisialisasi DHT sensor
  dht.begin();

  lcd.begin(16, 2); // Inisialisasi LCD dengan jumlah kolom dan baris (16x2 karakter)
  lcd.backlight(); // Nyalakan lampu latar LCD
  lcd.setCursor(0, 0);
  lcd.print("IoT Project");

  // Initialize the ultrasonic sensor pins
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);

  // Initialize the LED pin as output
  pinMode(LED_PIN, OUTPUT);

  timer = millis();
}

void loop() {
  float h = dht.readHumidity();
  float t = dht.readTemperature();
  
  if (isnan(h) || isnan(t)) {
    Serial.println(F("Failed to read from DHT sensor"));
    return; // Keluar dari fungsi loop jika pembacaan gagal
  }

  // Menampilkan data suhu dan kelembapan di LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(t);
  lcd.print(" C");

  lcd.setCursor(0, 1);
  lcd.print("Hum: ");
  lcd.print(h);
  lcd.print(" %");

  ubidots.add("Hum", h);
  ubidots.add("Temp", t);
  Serial.print("Humidity: ");
  Serial.print(h);
  Serial.print(" Temperature: ");
  Serial.println(t);

  // put your main code here, to run repeatedly:
  if (!ubidots.connected())
  {
    ubidots.reconnect();
  }

  if ((millis() - timer) > PUBLISH_FREQUENCY) // triggers the routine every 5s
  {
    ubidots.add(VARIABLE_LABEL, t); // Insert your var Label and the value to send
    ubidots.publish(DEVICE_LABEL);

    float value = random(2000, 3000) / 100.0;
    float hume = random(1000, 10000) / 100.0;

    // Read temperature and humidity from DHT22
    float humidity = dht.readHumidity();
    float temperature = dht.readTemperature();

    conta++;
    ubidots.publish(DEVICE_LABEL);
    timer = millis();

    // Read distance from ultrasonic sensor
  long duration, distance;
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  duration = pulseIn(ECHO_PIN, HIGH);
  distance = duration * 0.034 / 2;

  // Turn on LED if the distance is less than 10 cm
  if (distance < 10) {
    digitalWrite(LED_PIN, HIGH);
  } else {
    digitalWrite(LED_PIN, LOW);
  }

  // Display temperature, humidity, and distance on the LCD
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(temperature);
  lcd.print(" C");

  lcd.setCursor(0, 1);
  lcd.print("Hum: ");
  lcd.print(humidity);
  lcd.print(" %");

  delay(1000);  // Delay for readability

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Dist: ");
  lcd.print(distance);
  lcd.print(" cm");

  delay(1000);  // Delay before next reading
  }
  
  Serial.print("Humidity: ");
    Serial.print("Temperature: ");
   Serial.print(" *C ");
  ubidots.loop();
  delay(5000);
}