#define BLYNK_TEMPLATE_ID           "TMPLqUGcc6I7"
#define BLYNK_TEMPLATE_NAME         "AG IoT Switch"
#define BLYNK_AUTH_TOKEN            "E73pXWQ2I23F7Al3HnZemyX6W97sSbTD"

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <Wire.h>
#include <SPI.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <OneWire.h>
#include <DallasTemperature.h>
// GPIO where the DS18B20 is connected to
#define ONE_WIRE_BUS 16
OneWire oneWire(ONE_WIRE_BUS);

// Pass our oneWire reference to Dallas Temperature sensor 
DallasTemperature sensors(&oneWire);

char auth[] = BLYNK_AUTH_TOKEN;
//#define APP_DEBUG

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_ADDRESS 0x3C ///< See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

float temp_0;
float temp_1;

BlynkTimer timer;

// This function sends Arduino's up time every second to Virtual Pin (5).
// In the app, Widget's reading frequency should be set to PUSH. This means
// that you define how often to send data to Blynk App.
// void myTimerEvent()
// {
// // You can send any value at any time.
// // Please don't send more that 10 values per second.
//    Blynk.virtualWrite(V5, millis() / 1000);
//  }

void setup()
{
  // Debug console
  Serial.begin(115200);
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.clearDisplay();
  display.setCursor(0,0);
  display.drawRoundRect(0, 0, 128, 64, 8, WHITE);
  display.drawRoundRect(5, 5, 118, 54, 8, WHITE);
// Sets the color to black with a white background
  display.setTextColor(WHITE);
  display.setCursor(15,8);
  display.println("Dual Temperature");
  display.drawLine(6,17,120,17, WHITE);
  display.setCursor(20,20);
  display.println("Please connect");
  display.setCursor(32,30);
  display.println("the wifi...");
  display.drawLine(6,40,120,40, WHITE);
  display.setCursor(33,46);
  display.println("R C C I I T");
  display.display();
  
  Serial.begin(115200);
  Serial.println("Connecting to wifi.......");
  Blynk.begin(auth, ssid, pass);
  sensors.begin();
  timer.setInterval(1000L, getSendData);
  Serial.println(" ");
  Serial.println("Testing Dual Sensor data");	
  
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
  // Setup a function to be called every second
  timer.setInterval(1000L, getSendData);
}

void loop()
{
  Blynk.run();
  timer.run(); // Initiates BlynkTimer
  display.clearDisplay();
  display.setCursor(0,0);
  display.drawRoundRect(0, 0, 128, 64, 8, WHITE);
  display.drawRoundRect(5, 5, 118, 54, 8, WHITE);

// Sets the color to black with a white background
  display.setTextColor(WHITE);
  display.setCursor(15,8);
  display.println("Dual Temperature");
  display.drawLine(6,17,120,17, WHITE);
  display.setCursor(10,20);
  display.println("Temp 1 = ");
  display.setCursor(10,30);
  display.println("Temp 2 = ");
  display.setCursor(65,20);
  display.println(temp_0, 4);
  display.setCursor(110,20);
  display.print((char)247); // degree symbol 
  display.println("C");
  display.setCursor(65,30);
  display.println(temp_1, 4);
  display.setCursor(110,30);
  display.print((char)247); // degree symbol 
  display.println("C"); 
  display.drawLine(6,40,120,40, WHITE);
  display.setCursor(33,46);
  display.println("R C C I I T");
  display.display();
}
/***************************************************
 * Send Sensor data to Blynk
 **************************************************/
void getSendData()
{
  sensors.requestTemperatures(); 
  temp_0 = sensors.getTempCByIndex(0); // Sensor 0 will capture Temp in Celcius
  temp_1 = sensors.getTempCByIndex(1); // Sensor 0 will capture Temp in Celcius

  Serial.print("Temp_0: ");
  Serial.print(temp_0, 4);
  Serial.print(" oC . Temp_1: ");
  Serial.print(temp_1, 4);
  Serial.println(" oC");
   
  Blynk.virtualWrite(10, temp_0); //virtual pin V10
  Blynk.virtualWrite(11, temp_1); //virtual pin V11
}