#include <LiquidCrystal.h>

// Initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

const int sensorPin = A0; // Pin connected to the sensor

void setup() {
  // Set up the LCD's number of columns and rows
  lcd.begin(16, 2);
  // Print a message to the LCD
  lcd.print("Heartbeat Sensor");

  // Initialize serial communication for debugging purposes
  Serial.begin(9600);
}

void loop() {
  // Read the input on analog pin 0 (value between 0 and 1023)
  int sensorValue = analogRead(sensorPin);

  // Convert the analog reading (0 to 1023) to a voltage (0 to 5V)
  float voltage = sensorValue * (5.0 / 1023.0);

  // Convert the voltage to a heartbeat value
  int heartbeat = map(sensorValue, 0, 1023, 0, 150); // Adjust based on your sensor's characteristics

  // Print the voltage and heartbeat to the Serial Monitor for debugging
  Serial.print("Sensor Value: ");
  Serial.print(sensorValue);
  Serial.print(" Voltage: ");
  Serial.print(voltage);
  Serial.print(" V Heartbeat: ");
  Serial.print(heartbeat);
  Serial.println(" bpm");

  // Set the cursor to column 0, line 1
  lcd.setCursor(0, 1);
  // Print the heartbeat value to the LCD
  lcd.print("Heartbeat: ");
  lcd.print(heartbeat);
  lcd.print(" bpm  ");

  // Wait for a while before repeating the loop
  delay(1000); // Update every second
}