#define BLYNK_TEMPLATE_ID "TMPL64ZffXxdf"
#define BLYNK_TEMPLATE_NAME "Wokwi"
#define BLYNK_AUTH "3WfHOBhLmfucCULspYiUbpy98CY57g5i"

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

#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""

#define OLED_RESET -1
Adafruit_SSD1306 display(OLED_RESET);

#define POTENTIOMETER_PIN 36
#define ENCODER_CLK_PIN 34
#define ENCODER_DT_PIN 35

BlynkTimer timer;
int potValue = 0;
int encoderPos = 0;
int encoderPinALast = LOW;

void readPotentiometer()
{
  int newValue = analogRead(POTENTIOMETER_PIN);
  if (newValue != potValue)
  {
    potValue = newValue;
    Blynk.virtualWrite(V1, potValue);
  }
}

void checkEncoder()
{
  int encoderPinA = digitalRead(ENCODER_CLK_PIN);
  if ((encoderPinALast == LOW) && (encoderPinA == HIGH))
  {
    if (digitalRead(ENCODER_DT_PIN) == LOW)
    {
      encoderPos--;
    }
    else
    {
      encoderPos++;
    }
    Blynk.virtualWrite(V2, encoderPos);
  }
  encoderPinALast = encoderPinA;
}

BLYNK_CONNECTED() {
  Blynk.syncAll();
}

void setup()
{
  Serial.begin(115200);

  Blynk.begin(BLYNK_AUTH, WIFI_SSID, WIFI_PASSWORD);

  Wire.begin();
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.display();
  delay(2000);
  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(WHITE);

  pinMode(POTENTIOMETER_PIN, INPUT);
  pinMode(ENCODER_CLK_PIN, INPUT_PULLUP);
  pinMode(ENCODER_DT_PIN, INPUT_PULLUP);

  timer.setInterval(100L, readPotentiometer);
  timer.setInterval(100L, checkEncoder);
}

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