#define BLYNK_PRINT Serial
#define BLYNK_TEMPLATE_ID "TMPL5gudIlu_d"
#define BLYNK_TEMPLATE_NAME "esp32 LM35 oled version 2"
#define BLYNK_AUTH_TOKEN "YQ_FFMlV3-4eEdzrXQAoLjXvUHI9Gh5p"

#define ledPin 5

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define PIN_LM35       34
#define ADC_VREF_mV    5000.0 // in millivolt, el sensor era para Arduino
#define ADC_RESOLUTION 4096.0
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
#define SCREEN_ADDRESS 0x3C ///(0x3D) See datasheet for Address;

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

  Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
  BlynkTimer tiempo;

  static const uint8_t image_data_temp[448] = {
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x00, 0xe0, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x41, 0xb0, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0xe3, 0x18, 0x00, 0x00, 
      0x00, 0x00, 0x01, 0xf2, 0x08, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x02, 0x08, 0x00, 0x00, 
      0x00, 0x00, 0x01, 0xfa, 0x0b, 0xfc, 0x00, 
      0x00, 0x00, 0x07, 0x0e, 0x08, 0x00, 0x00, 
      0x00, 0x3c, 0x3c, 0x02, 0x08, 0x00, 0x00, 
      0x00, 0x38, 0xe0, 0x02, 0x08, 0x00, 0x00, 
      0x00, 0x31, 0x80, 0x02, 0x0b, 0xe0, 0x00, 
      0x00, 0x23, 0x00, 0x02, 0x08, 0x00, 0x00, 
      0x00, 0x06, 0x00, 0x02, 0xe8, 0x00, 0x00, 
      0x00, 0x0c, 0x00, 0x02, 0xe8, 0x00, 0x00, 
      0x00, 0x08, 0x00, 0x02, 0xeb, 0xfc, 0x00, 
      0x00, 0x18, 0x00, 0x02, 0xe8, 0x00, 0x00, 
      0x00, 0x10, 0x00, 0x02, 0xe8, 0x00, 0x00, 
      0x00, 0x30, 0x00, 0x02, 0xe8, 0x00, 0x00, 
      0x00, 0x20, 0x00, 0x02, 0xeb, 0xe0, 0x00, 
      0x00, 0x20, 0x00, 0x02, 0xe8, 0x00, 0x00, 
      0x01, 0x60, 0x00, 0x02, 0xe8, 0x00, 0x00, 
      0x03, 0x40, 0x00, 0x02, 0xe8, 0x00, 0x00, 
      0x07, 0x40, 0x00, 0x02, 0xe8, 0x00, 0x00, 
      0x03, 0x40, 0x00, 0x02, 0xeb, 0xfc, 0x00, 
      0x01, 0x60, 0x00, 0x02, 0xe8, 0x00, 0x00, 
      0x00, 0x20, 0x00, 0x02, 0xe8, 0x00, 0x00, 
      0x00, 0x30, 0x00, 0x02, 0xe8, 0x00, 0x00, 
      0x00, 0x10, 0x00, 0x02, 0xe8, 0x00, 0x00, 
      0x00, 0x18, 0x00, 0x02, 0xe8, 0x00, 0x00, 
      0x00, 0x08, 0x00, 0x02, 0xe8, 0x00, 0x00, 
      0x00, 0x0c, 0x00, 0x02, 0xe8, 0x00, 0x00, 
      0x00, 0x06, 0x00, 0x02, 0xe8, 0x00, 0x00, 
      0x00, 0x23, 0x00, 0x06, 0xec, 0x00, 0x00, 
      0x00, 0x31, 0x80, 0x08, 0x62, 0x00, 0x00, 
      0x00, 0x38, 0xe0, 0x10, 0x39, 0x00, 0x00, 
      0x00, 0x3c, 0x38, 0x20, 0x3c, 0x80, 0x00, 
      0x00, 0x00, 0x0c, 0x20, 0x3e, 0x80, 0x00, 
      0x00, 0x00, 0x07, 0xe0, 0x7e, 0xc0, 0x00, 
      0x00, 0x00, 0x00, 0x40, 0x7e, 0x40, 0x00, 
      0x00, 0x00, 0x1f, 0x40, 0xfe, 0x40, 0x00, 
      0x00, 0x00, 0x0e, 0x61, 0xfe, 0xc0, 0x00, 
      0x00, 0x00, 0x04, 0x2f, 0xfe, 0x80, 0x00, 
      0x00, 0x00, 0x00, 0x27, 0xfc, 0x80, 0x00, 
      0x00, 0x00, 0x00, 0x13, 0xf9, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x08, 0xe2, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x06, 0x0c, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x03, 0xf8, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
  };

 void Lectura() 
{  // This function describes what will happen with each timer tick  
  int adcVal = analogRead(PIN_LM35);
  float milliVolt = adcVal * (ADC_VREF_mV / ADC_RESOLUTION);
  float temperatura=milliVolt/10;
    Blynk.virtualWrite(V2, temperatura); 
      display.clearDisplay();
  int ancho_img = 50;
  int alto_img = 64;
      display.drawBitmap(0, 0, image_data_temp, ancho_img, alto_img, SSD1306_INVERSE);
      display.display();
      display.setCursor(55, 17);   
      display.print(temperatura);
      display.display();
     /* display.setCursor(55, 17);   
      display.print(temperatura);
      display.display();*/
 if (temperatura > 35)
 { 
 Blynk.logEvent("alta_temperatura");
 }
}

void setup() {
  Serial.begin(9600);
  Serial.println("Programa de control de temperatura");
  // en Wokwi
  Serial.println("Pulsa sobre el sensor LM35 para cambiar el valor de Tª");
      display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS); // initialize the OLED     
  // initialize OLED display with I2C address 0x3C
  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) 
    {
      Serial.println(F("failed to start SSD1306 OLED"));
      while (1);
    }

  delay(2000);         // wait two seconds for initializing
      display.clearDisplay(); // clear display
      display.setTextSize(2);         // set text size
      display.setTextColor(WHITE);    // set text color
      display.setCursor(0, 0);
  
    Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
    tiempo.setInterval(1000L, Lectura); // Setting interval to send data to Blynk Cloud

  pinMode(ledPin, OUTPUT); // GPIO 5 es la salida donde está el LED
  
 }

 BLYNK_WRITE(V0) // Se ejecuta cuando cambia el valor del pin virtual V0
  { 
    if(param.asInt() == 1) // lee el valor del pin virtual y lo compara con ‘1’
    digitalWrite(ledPin,HIGH);  // enciende el LED
    else  
    digitalWrite(ledPin,LOW);  // apaga el LED
  }
 
 BLYNK_CONNECTED()
  {  
  Blynk.syncVirtual(V0);  // sincroniza el estado del widget
  }



void loop() {
  
    Blynk.run(); // Runs all Blynk stuff  
    tiempo.run(); // runs BlynkTimer

}