#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <ACS712.h>
#include <LM35.h>

#define TEMP_SENSOR_PIN 36       // Pin untuk sensor suhu (LM35)
#define CURRENT_SENSOR_PIN 39    // Pin untuk sensor arus (ACS712)
#define BUZZER_PIN 26            // Pin untuk buzzer
#define INVERTER_LED_PIN 25      // Pin untuk LED inverter

// Konfigurasi ambang batas
const float TEMP_THRESHOLD =60.0;  // Ambang batas suhu (°C)
const float CURRENT_THRESHOLD = 5.0;  // Ambang batas arus (A)

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

void setup() {
  Serial.begin(115200);
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(INVERTER_LED_PIN, OUTPUT);

  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Inverter System");
  delay(2000);
  lcd.clear();
}

void loop() {
  // Baca suhu dari LM35
  int tempValue = analogRead(TEMP_SENSOR_PIN);
  float temperature = (tempValue * 3.3 / 4095.0) * 100.0;  // Konversi ke °C

  // Baca arus dari ACS712
  int currentValue = analogRead(CURRENT_SENSOR_PIN);
  float current = ((currentValue * 3.3 / 4095.0) - 2.5) / 0.185;  // Konversi ke A

  // Tampilkan nilai pada Serial Monitor
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println(" °C");

  Serial.print("Current: ");
  Serial.print(current);
  Serial.println(" A");

  // Tampilkan nilai pada LCD
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(temperature);
  lcd.print(" C");

  lcd.setCursor(0, 1);
  lcd.print("Curr: ");
  lcd.print(current);
  lcd.print(" A");

  // Proteksi suhu atau arus
  if (temperature > TEMP_THRESHOLD || current > CURRENT_THRESHOLD) {
    digitalWrite(BUZZER_PIN, HIGH);      // Aktifkan buzzer
    digitalWrite(INVERTER_LED_PIN, LOW); // Matikan inverter
    lcd.setCursor(10, 1);
    lcd.print("OFF ");
    Serial.println("WARNING: Threshold exceeded! Inverter OFF");
  } else {
    digitalWrite(BUZZER_PIN, LOW);       // Matikan buzzer
    digitalWrite(INVERTER_LED_PIN, HIGH); // Hidupkan inverter
    lcd.setCursor(10, 1);
    lcd.print("ON  ");
    Serial.println("Inverter ON");
  }

  delay(1000);  // Delay 1 detik
}