#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);
const int buttonPin = 2; // Pin untuk tombol
const int relayPins[] = {5, 6, 7, 8, 9, 10, 11, 12}; // Pin untuk relay
const int numRelays = 8; // Jumlah relay
const int delayTime = 1500; // Waktu delay antara setiap relay

const int arusPin = A0;  // Pin analog untuk sensor ACS712
const int teganganPin = A1; // Pin analog untuk sensor ZMPT101B

int currentState = LOW;
int lastState = LOW;

void setup() {
  pinMode(buttonPin, INPUT);
  for (int i = 0; i < numRelays; i++) {
    pinMode(relayPins[i], OUTPUT);
  }
  lcd.init();
  lcd.init();
  lcd.backlight();
  lcd.setCursor(4, 0);
  lcd.print("FH Audio");
}

void loop() {
  // Membaca nilai arus dari sensor ACS712
  int nilaiArus = analogRead(arusPin);
  float teganganArus = (nilaiArus - 512.0) / 1024.0 * 5000.0 / 185.0;

  // Membaca nilai tegangan dari sensor ZMPT101B
  int nilaiTegangan = analogRead(teganganPin);
  float teganganSensor = (nilaiTegangan / 1024.0) * 5000.0;

  lcd.setCursor(0, 1);
  lcd.print(teganganArus);
  lcd.print("mA ");
  lcd.print(teganganSensor);
  lcd.print("V       ");

  currentState = digitalRead(buttonPin);
  if (currentState != lastState) {
    if (currentState == HIGH) {
      turnOnRelays();
    } else {
      turnOffRelays();
    }
    delay(50); // Debouncing delay
  }

  lastState = currentState;
}

void turnOnRelays() {
  for (int i = 0; i < numRelays; i++) {
    digitalWrite(relayPins[i], HIGH);
    delay(delayTime);
  }
}

void turnOffRelays() {
  for (int i = numRelays - 1; i >= 0; i--) {
    digitalWrite(relayPins[i], LOW);
    delay(delayTime);
  }
}