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

// ACS712 5A Current Sensor
const int currentSensorPin = A0; // ACS712 output

// ZMPT101B Voltage Sensor
const int voltageSensorPin = A1;

LiquidCrystal_I2C lcd(0x27, 20, 4);

void setup() {
  lcd.init();
  lcd.backlight();
}

void loop() {
  // --- CURRENT (ACS712 5A) ---
  int adcCurrent = analogRead(currentSensorPin);

  // Convert ADC to voltage
  float voltageCurrent = (adcCurrent * 5.0) / 1023.0;

  // ACS712 5A: sensitivity = 0.185 V/A
  float current = (voltageCurrent - 2.5) / 0.185;

  // --- VOLTAGE (ZMPT101B) ---
  int adcVoltage = analogRead(voltageSensorPin);
  float voltage = (adcVoltage / 1023.0) * 250.0;

  // --- LCD DISPLAY ---
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Voltage: ");
  lcd.print(voltage, 2);
  lcd.print(" V");

  lcd.setCursor(0, 1);
  lcd.print("Current: ");
  lcd.print(current, 2);
  lcd.print(" A");

  delay(1000);
}