#define BLYNK_PRINT Serial


#define BLYNK_TEMPLATE_ID "TMPL3j_4569VK"
#define BLYNK_TEMPLATE_NAME "Healthcare IoT"
#define BLYNK_AUTH_TOKEN "eHVKnCSt24JmRHXj7aNa85ny85rGCyw8"



#include <Wire.h>
#include <WiFi.h>
#include <LiquidCrystal_I2C.h>
#include <BlynkSimpleEsp32.h>
#include <DHT.h>


char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

const int led = 2;
const int pulsePin = 35;
#define DHTPIN 4
#define DHTTYPE DHT22 
float celsius;
int valPulse;
BlynkTimer timer;

DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup(){
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  lcd.print("Connecting...");
  
  WiFi.begin(ssid, pass);

  while(WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
    lcd.setCursor(0,0);
    lcd.print("WiFi Connecting");

  }
  lcd.clear();
  lcd.print("WiFi Connected");

  Blynk.begin(auth, ssid, pass);
  lcd.setCursor(0,1);
  lcd.print("Blynk Ready");
  lcd.clear();

  timer.setInterval(2000L, sendDataToBlink);

}

void sendDataToBlink(){
    celsius = dht.readTemperature();
    Serial.print("Temp is ");
    Serial.println(celsius);

    valPulse = analogRead(pulsePin);
    valPulse = map(valPulse, 0, 4095, 60, 100);

    if(isnan(celsius)){
      Serial.println("Failed to read from Temp Sensor");
      lcd.setCursor(0,0);
      lcd.print("Sensor Error!");
      lcd.clear();
      return;
    }
    if(isnan(valPulse)){
      Serial.println("Failed to read from Temp Sensor");
      lcd.setCursor(0,0);
      lcd.print("Sensor Error!");
      lcd.clear();
      return;
    }
    lcd.setCursor(0, 0);
    lcd.print("temp: ");
    lcd.print(celsius);
    lcd.print("C");

    lcd.setCursor(0,1);
    lcd.print("Heart rate: ");
    lcd.print(valPulse);
    lcd.print("BPM");

    Blynk.virtualWrite(V1, celsius);
    Blynk.virtualWrite(V2, valPulse);
    Serial.println("data is sent to blynk");

}

void loop(){
  Blynk.run();
  timer.run();

}