#include <Wire.h>>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <BlynkSimpleEsp32.h>
#include <ESP32Servo.h>
#include <DHT.h>

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

Adafruit_SSD1306 display(128, 64, &Wire);

#define BLYNK_TEMPLATE_ID "TMPL6eGouzwKy"
#define BLYNK_TEMPLATE_NAME "hippomorakot"
#define BLYNK_AUTH_TOKEN "ZXi0pUZTZf5cWxbInVX3GcdNQ-PCoL8y"
#define BLYNK_PRINT Serial
#define DHT_PIN 27
#define DHT_TYPE DHT22
DHT dht(DHT_PIN, DHT_TYPE);

String displayString;

void setup() 
{
  Serial.begin(115200);
  dht.begin();
  Blynk.begin(auth, ssid, pass);
  servo.attach(18);
  
  pinMode(14, OUTPUT);
  pinMode(12, OUTPUT);
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(50, 20);
  display.println("Suphanat Sihaitthiwath!");
  display.println("6409610331");
  display.write(3);
  display.write(3);
  display.write(3);
  display.display();
  display.startscrollright(0x00, 0x07);
  delay(5000);
  display.stopscroll();
  delay(1000);
  display.clearDisplay();
  displayString.reserve(10);
}
void loop() {
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();
  
  if (isnan(temperature) || isnan(humidity))
   displayString = "Failed";
  } else {
    displayString  = String(tempC, 1); 
    displayString += "°C";
    displayString += String(humi, 1); 
    displayString += "%";
  }
  Serial.println(displayString);    
  oledDisplayCenter(displayString);

Blynk.run();
}
BLYNK_WRITE(V0)
{
servo.write(param.asInt());  
}
BLYNK_WRITE(V1)
{
servo.write(0);
}
BLYNK_WRITE(V2)
{
servo.write(180);
}

void oledDisplayCenter(String text) {
  int16_t x1;
  int16_t y1;
  uint16_t width;
  uint16_t height;

  display.getTextBounds(text, 0, 0, &x1, &y1, &width, &height);

  
  display.clearDisplay(); 
  display.setCursor((SCREEN_WIDTH - width) / 2, (SCREEN_HEIGHT - height) / 2);
  display.println(text); 
  display.display();
}