#define BLYNK_TEMPLATE_NAME "Oxygen LevelMonitor"
#define BLYNK_AUTH_TOKEN "qIR3zPs4DzSKptB9gKiDT_HariCQDBBS"
#define BLYNK_TEMPLATE_ID "TMPL3QMH7weTO"

// Include necessary libraries
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <HardwareSerial.h>

// WiFi credentials
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

// Pin configuration
const int pirPin = 15;  // Digital pin to which the PIR sensor is connected
int pirValue = 0;       // Variable to store the sensor value

BlynkTimer timer;  // Blynk timer object

void setup() {
  Serial.begin(115200);  // Initialize serial communication at 115200 baud

  // Connect to Blynk
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);  

  // Set a timer to call sendData every 2 seconds
  timer.setInterval(2000L, sendData);

  // Set PIR pin as input
  pinMode(pirPin, INPUT);

  Serial.println("Hello, ESP32!");  // Print a message to indicate the setup is complete
}

void sendData() {
  pirValue = digitalRead(pirPin);  // Read the digital value from the PIR sensor

  // Debugging information
  Serial.print("PIR value: ");
  Serial.println(pirValue);

  Blynk.virtualWrite(V0, pirValue);  // Send the sensor value to Blynk

  // Check if the sensor value indicates motion and control the LED
  if (pirValue == HIGH) {
    Serial.println("Motion detected. Turning LED ON.");
    Blynk.virtualWrite(V2, 255);  // Turn on the virtual LED (255 is the maximum value for the LED widget)
  } else {
    Serial.println("No motion detected. Turning LED OFF.");
    Blynk.virtualWrite(V2, 0);    // Turn off the virtual LED
  }
}

void loop() {
  Blynk.run();  // Run Blynk
  timer.run();  // Run the timer
}