#include <LiquidCrystal.h>

// Define LCD Pins (Adjust these pins based on your Wokwi setup)
const int rs = 14, en = 26, d4 = 25, d5 = 33, d6 = 32, d7 = 27;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

// IR Sensor and LED Pins
const int IRSensorPin = 2;
const int ledPin = 13;

// Variables for RPM Calculation
int inputState;
int lastInputState = LOW;
long lastDebounceTime = 0;
long debounceDelay = 5;
long currentTime;
long endTime;
long startTime;
int RPM = 0;
double trip = 0;
double kkbanspd = 0.00223; // Constant for wheel size (adjust based on your bike's wheel circumference)
float lnTime = 0;

void setup() {
  pinMode(IRSensorPin, INPUT);
  pinMode(ledPin, OUTPUT);

  Serial.begin(115200);  // Set a higher baud rate for ESP32
  lcd.begin(16, 2);

  // Initial LCD setup display
  lcd.clear();
  lcd.print("Ge Creative");
  lcd.setCursor(0, 1);
  lcd.print("Bike Speedometer");
  delay(2000);

  endTime = 0;
}

void loop() {
  // RPM Calculation and Display
  currentTime = millis();
  int currentSwitchState = digitalRead(IRSensorPin);

  if (currentSwitchState != lastInputState) {
    lastDebounceTime = millis();
  }

  if ((millis() - lastDebounceTime) > debounceDelay) {
    if (currentSwitchState != inputState) {
      inputState = currentSwitchState;
      if (inputState == LOW) {
        digitalWrite(ledPin, LOW);
        calculateRPM(); // Calculate RPM from sensor
      } else {
        digitalWrite(ledPin, HIGH);
      }
    }
  }
  lastInputState = currentSwitchState;

  // LCD Display for Speed and Trip
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Spd:");
  lcd.setCursor(5, 0);
  lcd.print((RPM * kkbanspd) * 60); // Calculate speed in km/h
  lcd.setCursor(12, 0);
  lcd.print("Km/h");

  lcd.setCursor(0, 1);
  lcd.print("Trp:");
  lcd.setCursor(5, 1);
  lcd.print(trip * kkbanspd); // Calculate total trip in km
  lcd.setCursor(12, 1);
  lcd.print("Km");

  delay(500);
  RPM = 0;
}

void calculateRPM() {
  startTime = lastDebounceTime;
  lnTime = startTime - endTime;
  RPM = 60000 / (startTime - endTime);
  endTime = startTime;
  trip++;
}