// simple project using Arduino UNO and 128x64 OLED Display to display analog clock
// note - this project is meant for the 128x128 SH1107 OLED display, but WOKWI currently only supports 128x64 OLED display
// for this reason, the preview here only shows half of the design
// created by upir, 2023
// youtube channel: https://www.youtube.com/upir_upir

// YOUTUBE VIDEO: https://youtu.be/srgsBWHSNSQ

// links from the video:
// 128x128 SH1107 OLED Display: https://s.click.aliexpress.com/e/_DdOCQHj
// 128x64 SSD1306 OLED Display: https://s.click.aliexpress.com/e/_DCKdvnh
// Arduino UNO: https://s.click.aliexpress.com/e/_AXDw1h
// Arduino breadboard prototyping shield: https://s.click.aliexpress.com/e/_ApbCwx
// Photopea (online Photoshop-like tool): https://www.photopea.com/
// u8g2 documentation: https://github.com/olikraus/u8g2/wiki/u8gvsu8g2


// Related videos:
// Arduino Parking Sensor - https://youtu.be/sEWw087KOj0
// Turbo pressure gauge with Arduino and OLED display - https://youtu.be/JXmw1xOlBdk
// Arduino Car Cluster with OLED Display - https://youtu.be/El5SJelwV_0
// Knob over OLED Display - https://youtu.be/SmbcNx7tbX8
// Arduino + OLED = 3D ? - https://youtu.be/kBAcaA7NAlA
// Arduino OLED Gauge - https://youtu.be/xI6dXTA02UQ
// Smaller & Faster Arduino - https://youtu.be/4GfPQoIRqW8

// https://github.com/olikraus/u8g2/wiki/fntgrpx11

#include <Arduino.h>
#include <U8g2lib.h> // u8g2 library for drawing on OLED display - needs to be installed in Arduino IDE first
#include <Wire.h> // wire library for IIC communication with the OLED display

// U8G2_SSD1306_128X64_NONAME_1_HW_I2C u8g2(U8G2_R0); // set the OLED display to 128x64px, HW IIC, no rotation, used in WOKWI
U8G2_SH1107_128X128_1_HW_I2C u8g2(U8G2_R0); // final display, 128x128px [page buffer, size = 128 bytes], HW IIC connection

// IIC connection of the OLED display and Arduino UNO
// +5V > +5V
// GND > GND
// SCL (serial clock) > A5 or SCL
// SDA (serial data) > A4 or SDA

int center_x = 64; // display x center, 64px for the 128x128px display
int center_y = 64; // display y center, 64px for the 128x128px display

void setup(void) { // Arduino setup
  u8g2.begin();  // begin the u8g2 library
  u8g2.setContrast(255); // set display contrast/brightness
}


void loop(void) { // main Arduino loop


  u8g2.firstPage(); // select the first page of the display (page is 128x8px), since we are using the page drawing method of the u8g2 library
  do { // draw  
  u8g2.setDrawColor(1); // set the drawing color to white    

  // draw labels 12, 3, 6 and 9, positions are hardcoded
  u8g2.setFont(u8g2_font_6x10_tr); // set the u8g2 font
  u8g2.drawStr(3,15,"test");
  u8g2.drawStr(3,25,"Davide : 0bpm");
  u8g2.setFont(u8g2_font_6x10_tf); // set the u8g2 font
  u8g2.drawStr(3,35,"Chord : Am");
  u8g2.drawStr(3,45,"Rhythm : chachachi");        
    // draw the center circle to cover the center part of the hands
    // u8g2.setColorIndex(0); // black color
    // u8g2.drawDisc(center_x, center_y, 4);
    // u8g2.setColorIndex(1); // white color
    // u8g2.drawCircle(center_x, center_y, 4);   

  } while ( u8g2.nextPage() ); // go over all the pages until the whole display is updated
  // for(;;);
}