NodeMCU ESP8266 ile WiFi Üzerinden OLED Mesaj Uygulaması

#include <Wire.h>
#include "font.h"

#define OLED_address  0x3c                                // all the OLED's I have seen have this address
//#define offset 0x00    // SDD1306                       // offset=0 for SSD1306 controller
#define offset 0x02    // SH1106                          // offset=2 for SH1106 controller

//==========================================================//
// Resets display depending on the actual mode.
static void reset_display(void)
{
  displayOff();
  clear_display();
  displayOn();
}

//==========================================================//
// Turns display on.
void displayOn(void)
{
  sendcommand(0xaf);        //display on
}

//==========================================================//
// Turns display off.
void displayOff(void)
{
  sendcommand(0xae);    //display off
}

//==========================================================//
// Clears the display by sendind 0 to all the screen map.
static void clear_display(void)
{
  unsigned char i, k;
  for (k = 0; k < 8; k++)
  {
    setXY(k, 0);
    {
      for (i = 0; i < (128 + 2 * offset); i++) //locate all COL
      {
        SendChar(0);         //clear all COL
        //delay(10);
      }
    }
  }
}

//==========================================================//
// Actually this sends a byte, not a char to draw in the display.
// Display's chars uses 8 byte font the small ones and 96 bytes
// for the big number font.
static void SendChar(unsigned char data)
{
  Wire.beginTransmission(OLED_address); // begin transmitting
  Wire.write(0x40);//data mode
  Wire.write(data);
  Wire.endTransmission();    // stop transmitting
}

//==========================================================//
// Prints a display char (not just a byte) in coordinates X Y,
// being multiples of 8. This means we have 16 COLS (0-15)
// and 8 ROWS (0-7).
static void sendCharXY(unsigned char data, int X, int Y)
{
  setXY(X, Y);
  Wire.beginTransmission(OLED_address); // begin transmitting
  Wire.write(0x40);//data mode

  for (int i = 0; i < 8; i++)
    Wire.write(pgm_read_byte(myFont[data - 0x20] + i));

  Wire.endTransmission();    // stop transmitting
}

//==========================================================//
// Used to send commands to the display.
static void sendcommand(unsigned char com)
{
  Wire.beginTransmission(OLED_address);     //begin transmitting
  Wire.write(0x80);                          //command mode
  Wire.write(com);
  Wire.endTransmission();                    // stop transmitting
}

//==========================================================//
// Set the cursor position in a 16 COL * 8 ROW map.
static void setXY(unsigned char row, unsigned char col)
{
  sendcommand(0xb0 + row);              //set page address
  sendcommand(offset + (8 * col & 0x0f)); //set low col address
  sendcommand(0x10 + ((8 * col >> 4) & 0x0f)); //set high col address
}


//==========================================================//
// Prints a string regardless the cursor position.
static void sendStr(unsigned char *string)
{
  unsigned char i = 0;
  while (*string)
  {
    for (i = 0; i < 8; i++)
    {
      SendChar(pgm_read_byte(myFont[*string - 0x20] + i));
    }
    *string++;
  }
}

//==========================================================//
// Prints a string in coordinates X Y, being multiples of 8.
// This means we have 16 COLS (0-15) and 8 ROWS (0-7).
static void sendStrXY( char *string, int X, int Y)
{
  setXY(X, Y);
  unsigned char i = 0;
  while (*string)
  {
    for (i = 0; i < 8; i++)
    {
      SendChar(pgm_read_byte(myFont[*string - 0x20] + i));
    }
    *string++;
  }
}


//==========================================================//
// Inits oled and draws logo at startup
static void init_OLED(void)
{
  sendcommand(0xae);    //display off
  sendcommand(0xa6);            //Set Normal Display (default)
  // Adafruit Init sequence for 128x64 OLED module
  sendcommand(0xAE);             //DISPLAYOFF
  sendcommand(0xD5);            //SETDISPLAYCLOCKDIV
  sendcommand(0x80);            // the suggested ratio 0x80
  sendcommand(0xA8);            //SSD1306_SETMULTIPLEX
  sendcommand(0x3F);
  sendcommand(0xD3);            //SETDISPLAYOFFSET
  sendcommand(0x0);             //no offset
  sendcommand(0x40 | 0x0);      //SETSTARTLINE
  sendcommand(0x8D);            //CHARGEPUMP
  sendcommand(0x14);
  sendcommand(0x20);             //MEMORYMODE
  sendcommand(0x00);             //0x0 act like ks0108

  //sendcommand(0xA0 | 0x1);      //SEGREMAP   //Rotate screen 180 deg
  sendcommand(0xA0);

  //sendcommand(0xC8);            //COMSCANDEC  Rotate screen 180 Deg
  sendcommand(0xC0);

  sendcommand(0xDA);            //0xDA
  sendcommand(0x12);           //COMSCANDEC
  sendcommand(0x81);           //SETCONTRAS
  sendcommand(0xCF);           //
  sendcommand(0xd9);          //SETPRECHARGE
  sendcommand(0xF1);
  sendcommand(0xDB);        //SETVCOMDETECT
  sendcommand(0x40);
  sendcommand(0xA4);        //DISPLAYALLON_RESUME
  sendcommand(0xA6);        //NORMALDISPLAY

  clear_display();
  sendcommand(0x2e);            // stop scroll
  //----------------------------REVERSE comments----------------------------//
  sendcommand(0xa0);    //seg re-map 0->127(default)
  sendcommand(0xa1);    //seg re-map 127->0
  sendcommand(0xc8);
  // delay(1000);
  //----------------------------REVERSE comments----------------------------//
  // sendcommand(0xa7);  //Set Inverse Display
  // sendcommand(0xae);   //display off
  sendcommand(0x20);            //Set Memory Addressing Mode
  sendcommand(0x00);            //Set Memory Addressing Mode ab Horizontal addressing mode
  //  sendcommand(0x02);         // Set Memory Addressing Mode ab Page addressing mode(RESET)
}