#include <WiFi.h>
#include <Wire.h>
#include <LiquidCrystal.h>
#include <DHT.h>
#include <BlynkSimpleEsp32.h> // Include Blynk library for ESP32
#define BLYNK_AUTH_TOKEN "n_dSZ89mVEMGnQiCpIw-OHj0P8UkZ9DE"
#define BLYNK_TEMPLATE_ID "TMPL3PuBmJdoX"
#define BLYNK_TEMPLATE_NAME "IOT based smart cattle monitoring"


#define DHTPIN 12
#define HR_PIN 32 // Heart Rate Potentiometer
#define SPO2_PIN 33 // SpO2 Potentiometer
#define PIR_PIN 25

#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

const char auth[] = BLYNK_AUTH_TOKEN;
const char *ssid = "wokwi-GUEST";
const char *password = "";

BlynkTimer timer;

const int RS = 4, E = 15, DB4 = 5, DB5 = 18, DB6 = 19, DB7 = 21;
LiquidCrystal lcd(RS, E, DB4, DB5, DB6, DB7);

void sendSensorData() {
  // Read sensor data
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();
  int pirStatus = digitalRead(PIR_PIN);
  int heartRate = map(analogRead(HR_PIN), 0, 4095, 50, 150); // Assuming the heart rate range is from 50 to 150 bpm
  int spo2 = map(analogRead(SPO2_PIN), 0, 4095, 70, 100); // Assuming the SpO2 range is from 70% to 100%

  // Send sensor data to Blynk app
  Blynk.virtualWrite(V5, temperature);
  Blynk.virtualWrite(V6, humidity);
  Blynk.virtualWrite(V7, pirStatus);
  Blynk.virtualWrite(V8, heartRate);
  Blynk.virtualWrite(V9, spo2);
}

void setup() {
  Serial.begin(115200);
  dht.begin();
  lcd.begin(16, 2);
  Blynk.begin(auth, ssid, pass);  

  pinMode(HR_PIN, INPUT);
  pinMode(SPO2_PIN, INPUT);
  pinMode(PIR_PIN, INPUT);

  connectWiFi();
}

void loop() {
  float temperature = dht.readTemperature(); // Read temperature in Celsius
  float humidity = dht.readHumidity(); // Read humidity

  int heartRate = map(analogRead(HR_PIN), 0, 4095, 50, 150);
  int spo2 = map(analogRead(SPO2_PIN), 0, 4095, 70, 100);
  int pirStatus = digitalRead(PIR_PIN);
  display(temperature, humidity, heartRate, spo2, pirStatus);

  Blynk.run();
  timer.run();
  delay(2000);
}

void connectWiFi() {
  Serial.println("Connecting to WiFi");
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting...");
  }
  Serial.println("Connected to WiFi");
  Blynk.config(BLYNK_AUTH_TOKEN);
  timer.setInterval(1000L, sendSensorData);
}

void display(float temp, float hum, int hr, int spo2, int pir) {
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("T:");
  lcd.print(temp);
  lcd.print("C H:");
  lcd.print(hum);
  lcd.print("%");
  lcd.setCursor(0, 1);
  lcd.print("HR:");
  lcd.print(hr);
  lcd.print(" SpO2:");
  lcd.print(spo2);
  lcd.print("% ");
  lcd.print("PIR:");
  lcd.print(pir);
}