// Define PIR sensor pin
const int pirSensorPin = 34; // Digital pin connected to PIR motion sensor

// Logging parameters
const int logInterval = 1000;  // Log data every 1 second (in ms)
const int maxLogSize = 60;     // Store last 60 readings (1 minute of data)

// Data storage array
int motionLog[maxLogSize];
int logIndex = 0;

// Timing
unsigned long lastLogTime = 0;

void setup() {
  pinMode(pirSensorPin, INPUT);
  Serial.begin(115200);
  Serial.println("Breathing and Heart Rate (Motion) Logging");
}

void loop() {
  // Read motion detected by PIR sensor
  int motionDetected = digitalRead(pirSensorPin);

  // Log data at regular intervals
  if (millis() - lastLogTime >= logInterval) {
    logData(motionDetected);
    lastLogTime = millis();
  }

  // Display current motion status
  Serial.print("Motion Detected: ");
  Serial.println(motionDetected ? "YES" : "NO");

  delay(500); // Short delay for stability
}

// Function to log data
void logData(int motionDetected) {
  // Add data to circular buffer
  motionLog[logIndex] = motionDetected;
  logIndex = (logIndex + 1) % maxLogSize;

  // Print logged data to serial for demonstration
  Serial.println("Logged Data:");
  for (int i = 0; i < maxLogSize; i++) {
    Serial.print("Log ");
    Serial.print(i + 1);
    Serial.print(": ");
    Serial.println(motionLog[i] ? "Motion Detected" : "No Motion");
  }
  Serial.println();
}