/*
Project:  SSD1306 OLED Display with Bitmap 
Author:   Thomas Edlinger for www.edistechlab.com
Date:     Created 06.06.2020
Version:  V1.0
 
- Used Aduino IDE V1.8.13
Required libraries (sketch -> include library -> manage libraries)
 - Adafruit SSD1306 V2.2.1
 - Adafruit GFX Library V1.8.3
Required Board (Tools -> Board -> Boards Manager...)
 - Board: esp8266 by ESP8266 Community V2.7.4 
 - Board: ESP32 by Espressif Systems V1.0.2
Wirering for the Display:
SSD1306     ESP8266/MCU       ESP32         Arduino UNO     Arduino Mega
VCC         3.3V              3.3V          3.3V            3.3V
GND         GND               GND           GND             GND
SCL         D1 / GPIO 5       GPIO 22       GPIO 9          GPIO 5     
SDA         D2 / GPIO 4       GPIO 21       GPIO 10         GPIO 53    
*/

#include <Adafruit_SSD1306.h>
#include <Adafruit_GFX.h>
#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

int CLK = 13;  // Pin 9 to clk on encoder
int DT = 12;  // Pin 8 to DT on encoder
int RotPosition = 0; 
int rotation;  
int value;
boolean LeftRight;




void setup() {

pinMode (CLK,INPUT);
pinMode (DT,INPUT);
rotation = digitalRead(CLK); 






 
  Serial.begin(115200);
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C); // I2C address = 0x3C
  delay(1000);
  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(15, 0);
  display.print("Bandomat");
  display.setCursor(30, 30);
  display.print("V_0.01");
  display.setTextSize(1);
  display.setCursor(10, 55);
  display.print("Powerd_by_DFStudio");
  display.display(); 
  delay (3000);
  display.clearDisplay();
  display.display();
}

void loop() {
  value = digitalRead(CLK);
     if (value != rotation){ // we use the DT pin to find out which way we turning.
     if (digitalRead(DT) != value) {  // Clockwise
       RotPosition ++;
       LeftRight = true;
     } else { //Counterclockwise
       LeftRight = false;
       RotPosition--;
     }
}
 
}