#include <Wire.h>
#include <Adafruit_INA219.h>
#include <DHT.h>
#include <LiquidCrystal_I2C.h>

// Inisialisasi sensor
Adafruit_INA219 ina219;
#define DHTPIN 2      
#define DHTTYPE DHT11 
DHT dht(DHTPIN, DHTTYPE);

// Inisialisasi LCD 16x2 I2C
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Pin sensor infrared untuk RPM
#define IR_SENSOR_PIN 3
volatile int pulseCount = 0;  
unsigned long prevTime = 0;
float rpm = 0.0;

// Pin LED indikator
#define LED_PIN 5

// Fungsi Interrupt untuk RPM
void countPulse() {
  pulseCount++;
}

void setup() {
  Serial.begin(9600);

  // Inisialisasi sensor
  if (!ina219.begin()) {
    Serial.println("Gagal inisialisasi INA219");
    while (1);
  }
  
  dht.begin();
  
  // Konfigurasi sensor RPM
  pinMode(IR_SENSOR_PIN, INPUT);
  attachInterrupt(digitalPinToInterrupt(IR_SENSOR_PIN), countPulse, FALLING);

  // Konfigurasi LCD
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Monitoring...");

  // LED indikator
  pinMode(LED_PIN, OUTPUT);
}

void loop() {
  // Baca tegangan & arus
  float busVoltage = ina219.getBusVoltage_V();
  float current_mA = ina219.getCurrent_mA();
  float power_mW = busVoltage * (current_mA / 1000.0);

  // Baca suhu & kelembaban
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  // Hitung RPM setiap 1 detik
  unsigned long currentTime = millis();
  if (currentTime - prevTime >= 1000) {
    rpm = (pulseCount * 60) / 20.0; // Asumsi 20 lubang per putaran
    pulseCount = 0;
    prevTime = currentTime;
  }

  // Tampilkan data di Serial Monitor
  Serial.print("Tegangan: "); Serial.print(busVoltage); Serial.println(" V");
  Serial.print("Arus: "); Serial.print(current_mA); Serial.println(" mA");
  Serial.print("Daya: "); Serial.print(power_mW); Serial.println(" mW");
  Serial.print("Suhu: "); Serial.print(temperature); Serial.println(" C");
  Serial.print("Kelembaban: "); Serial.print(humidity); Serial.println(" %");
  Serial.print("RPM: "); Serial.print(rpm); Serial.println(" RPM");
  Serial.println("-----------------------------");

  // Tampilkan data ke LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("RPM: "); lcd.print(rpm);
  lcd.setCursor(0, 1);
  lcd.print("V: "); lcd.print(busVoltage, 1);
  lcd.print(" A: "); lcd.print(current_mA, 1);

  delay(2000); // Tampilkan selama 2 detik

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Daya: "); lcd.print(power_mW, 1);
  lcd.print(" mW");
  lcd.setCursor(0, 1);
  lcd.print("S:"); lcd.print(temperature, 1);
  lcd.print("C H:"); lcd.print(humidity, 1);
  lcd.print("%");

  delay(2000); // Tampilkan selama 2 detik

  // Nyalakan LED jika generator aktif (RPM > 0)
  if (rpm > 0) {
    digitalWrite(LED_PIN, HIGH);
  } else {
    digitalWrite(LED_PIN, LOW);
  }
}