Program Watt Meter LCD 20x4

watt_meter.in0

#include "ACS712.h"
#include <ZMPT101B.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>



// Inisialisasi LCD (Alamat I2C dan ukuran layar)
LiquidCrystal_I2C lcd(0x27, 20, 4);  // Pastikan alamat I2C benar, biasanya 0x27

//ACS712_20A for 20 Amp type
//ACS712_30A for 30 Amp type
ACS712 sensor(ACS712_30A, A0);

// ZMPT101B sensor output connected to analog pin A0
// and the voltage source frequency is 50 Hz.
ZMPT101B voltageSensor(A1, 50.0);
#define SENSITIVITY 500.0f

// Tarif dasar listrik (Rp per KWh)
const float tarifPerKWh = 1444.0;  
// Variabel untuk menyimpan nilai
float voltage = 0.0;
float current = 0.0;
float power = 0.0;  
float energy = 0.0;  // KWh
unsigned long startTime = 0;
unsigned long elapsedTime = 0;
float cost = 0.0;

void setup() {
  Serial.begin(9600);
  // Inisialisasi LCD
  lcd.init();
  lcd.backlight();  // Pastikan LCD menyala
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("SISTEM MONITORING ");
  lcd.setCursor(0, 1);
  lcd.print("KWH METER DIGITAL ");
  lcd.setCursor(0, 2);
  lcd.print("INDEKOS BERBASIS ");
  lcd.setCursor(0, 3);
  lcd.print("ARDUINO UNO - ACS712");
  delay(2000);
  lcd.clear();

  // acs calibrate
  sensor.calibrate();

  // Change the sensitivity value based on value you got from the calibrate
  // example.
  voltageSensor.setSensitivity(SENSITIVITY);
}

void loop() {
  float current = sensor.getCurrentAC();
  //ignoring the value below 0.09
  if (current < 0.09) {
    current = 0;
  } else {
    current = current * 0.615; // calibrating current
  }


  // read the voltage and then print via Serial.
  float voltage = voltageSensor.getRmsVoltage();
  Serial.println(voltage);

  // Menghitung daya dalam watt
  power = voltage * current;

  // Menghitung energi dalam KWh
  elapsedTime = (millis() - startTime) / 1000.0;  // Waktu dalam detik
  energy = (power / 1000.0) * (elapsedTime / 3600.0);  // Menghitung KWh (konversi detik ke jam)

  // Menghitung biaya pemakaian
  cost = energy * tarifPerKWh;

  // Menampilkan data ke LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("ID:MARCO SIRAIT");
  
  lcd.setCursor(0, 1);
  lcd.print("V:");
  lcd.print(voltage, 1);  // Menampilkan tegangan (1 angka desimal)
  
  lcd.setCursor(10, 1);
  lcd.print("A:");
  lcd.print(current, 2);  // Menampilkan arus (2 angka desimal)
  
  lcd.setCursor(0, 2);
  lcd.print("Kwh:");
  lcd.print(energy, 5);  // Menampilkan KWh (2 angka desimal)
  lcd.setCursor(12, 2);
  lcd.print("H:");
  lcd.print(elapsedTime / 3600);  // Menampilkan waktu dalam jam (desimal)
  lcd.setCursor(16, 2);
  lcd.print("S:");
  lcd.print(elapsedTime);  // Menampilkan waktu dalam jam (desimal)
  
  lcd.setCursor(0, 3);
  lcd.print("Rp:");
  lcd.print(cost, 2);  // Menampilkan biaya
  lcd.setCursor(12, 3);
  lcd.print("TDL:");
  lcd.print(tarifPerKWh, 0);  // Menampilkan tarif

  delay(1000);  // Delay untuk pembaruan tampilan
}