#include <LiquidCrystal_I2C.h>  // Include LCD library

/* ========== SENSOR PINS ========== */
#define CURRENT_PIN 34   // ACS712
#define VOLTAGE_PIN 35   // ZMPT101B

/* ========== CALIBRATION VALUES ========== */
float currentSensitivity = 0.185; // ACS712 5A = 185mV/A
float voltageCalibration = 250.0; // Max 250V (simulation)

/* ========== THRESHOLD VALUES ========== */
float currentThresholdLow = 0.5; // Low current threshold (in Amps)
float currentThresholdHigh = 5.0; // High current threshold (in Amps)
float voltageThresholdLow = 100.0; // Low voltage threshold (in Volts)
float voltageThresholdHigh = 240;  // High voltage threshold (in Volts)

/* ========== LCD SETTINGS ========== */
LiquidCrystal_I2C lcd(0x27, 16, 2);  // Change address and size as needed

void setup() {
  // Start Serial Monitor for debugging
  Serial.begin(115200);

  // Initialize LCD
  lcd.begin();
  lcd.backlight();
  
  // Print a startup message
  lcd.setCursor(0, 0);
  lcd.print("System Started");
  delay(1000);
  lcd.clear();
}

void loop() {
  // Read current and voltage
  float current = readCurrent();
  float voltage = readVoltage();

  // Display values on LCD
  lcd.setCursor(0, 0);
  lcd.print("Current: " + String(current) + " A");
  lcd.setCursor(0, 1);
  lcd.print("Voltage: " + String(voltage) + " V");
  
  // Send data to Wokwi or handle threshold events
  if (current > currentThresholdHigh || voltage > voltageThresholdHigh) {
    // Example of threshold exceeded action
    lcd.setCursor(0, 1);
    lcd.print("Threshold Exceeded!");
  }

  // Delay for readability
  delay(1000);
}

float readCurrent() {
  int rawCurrent = analogRead(CURRENT_PIN);
  float voltageCurrent = (rawCurrent * 3.3) / 4095.0; // Convert ADC value to voltage
  return (voltageCurrent - 2.5) / currentSensitivity; // Convert voltage to current
}

float readVoltage() {
  int rawVoltage = analogRead(VOLTAGE_PIN);
  float voltageSensor = (rawVoltage * 3.3) / 4095.0; // Convert ADC value to voltage
  return voltageSensor * voltageCalibration; // Convert to actual voltage
}