#include <Wire.h>
#include <I2Cdev.h>
#include <MPU6050.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <LiquidCrystal.h>

// Pedometer variables
MPU6050 accelgyro;
int16_t ax, ay, az;
unsigned long lastStepTime = 0;
unsigned long stepInterval = 300; // Time in milliseconds between steps
int stepCount = 0;

// Temperature sensor variables
#define ONE_WIRE_BUS 2
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

// Pulse sensor variables
#define PULSE_SENSOR_PIN A0
int pulseSensorValue;
int previousPulseSensorValue = 0; // Initialize previous value to 0
int heartRate = 0;
unsigned long lastPulseSensorTime = 0;
unsigned long pulseSensorInterval = 1000; // Time in milliseconds between pulse sensor readings

// LED pins
#define LED_FEVER 3
#define LED_STEP_COUNT 4
#define LED_HEART_RATE 5

// LCD pins
#define LCD_RS 7
#define LCD_EN 8
#define LCD_D4 9
#define LCD_D5 10
#define LCD_D6 11
#define LCD_D7 12

LiquidCrystal lcd(LCD_RS, LCD_EN, LCD_D4, LCD_D5, LCD_D6, LCD_D7);

void setup() {
    Wire.begin();
    accelgyro.initialize();
    sensors.begin(); // Start the temperature sensor library
    pinMode(LED_FEVER, OUTPUT);
    pinMode(LED_STEP_COUNT, OUTPUT);
    pinMode(LED_HEART_RATE, OUTPUT);
    lcd.begin(16, 2); // Initialize the LCD (16 columns, 2 rows)
}

void loop() {
    // Pedometer code
    accelgyro.getAcceleration(&ax, &ay, &az);
    if (abs(ax) > 1000 && millis() - lastStepTime > stepInterval) {
        stepCount++;
        lastStepTime = millis();
        digitalWrite(LED_STEP_COUNT, HIGH); // Turn on step count LED
        delay(1000); // Keep LED on for 1 second
        digitalWrite(LED_STEP_COUNT, LOW); // Turn off step count LED
    }

    // Temperature sensor code
    sensors.requestTemperatures();
    float tempC = sensors.getTempCByIndex(0);
    if (tempC > 39.5) { // If temperature is above 39.5°C, turn on fever LED
        digitalWrite(LED_FEVER, HIGH);
    } else {
        digitalWrite(LED_FEVER, LOW);
    }

    // Pulse sensor code
    if (millis() - lastPulseSensorTime > pulseSensorInterval) {
        pulseSensorValue = analogRead(PULSE_SENSOR_PIN);
        if (pulseSensorValue != previousPulseSensorValue) {
            // Check if the pulse sensor value is within a reasonable range
            if (pulseSensorValue > 100 && pulseSensorValue < 900) {
                heartRate = map(pulseSensorValue, 100, 900, 30, 220); // Map sensor value to heart rate
                if (heartRate > 100) { // If heart rate is above 100 bpm, turn on heart rate LED
                    digitalWrite(LED_HEART_RATE, HIGH);
                } else {
                    digitalWrite(LED_HEART_RATE, LOW);
                }
            }
        }
        previousPulseSensorValue = pulseSensorValue;
        lastPulseSensorTime = millis();
    }

    // Update LCD display
    lcd.clear(); // Clear the LCD display
    lcd.setCursor(0, 0); // Set the cursor to the first column of the first row
    lcd.print("Steps: ");
    lcd.print(stepCount);
    lcd.print(" HR: ");
    lcd.print(heartRate);
    lcd.setCursor(0, 1); // Set the cursor to the first column of the second row
    lcd.print("Temp: ");
    lcd.print(tempC);
    lcd.print(" C");
    if (tempC > 39.5) {
        lcd.print(" FEVER");
    } else {
        lcd.print("      ");
    }

    delay(100); // Adjust this delay as needed
}