2.9" Grayscale eInk / ePaper Display FeatherWing - 4 Level Grayscale

2.9" grayscale eInk / ePaper display with 296x128 pixels.   MicroSD socket included.   SPI communication.   Three custom buttons (A = D11, B = D12, C = D13) and a reset button are mounted on the display.  

Adafruit PN 4777

Adafruit tutorial

Adafruit 2.9" eInk Display Breakouts and FeatherWings tutorial

Firmware

In the Arduinio IDE, install the library 'Adafruit_EPD'.   Display update time is only one second (other displays typically required 15 seconds).   Each pixel can be white, light gray, dark gray or black.  

Adafruit_EPD library

Demo of Text Modes

/*
   
  Adafruit Feather M4 Express SAMD51 + ThinkInk 290 Grayscale 4 T5 Display


  AF_FeatherWing_Grayscale_eInk_ePaper_4777.ino
  
*/

/////////////////////////////////////////////////////////////////////////
// M4 Express built-in hardware

const uint8_t pinBuiltInLED = 13;  

const byte pinLiPoly = A6;

/////////////////////////////////////////////////////////////////////////
// ThinkInk 290 Grayscale4 T5 Display
//
// Adafruit PN 4777
// Adafruit 2.9" Grayscale eInk / ePaper Display FeatherWing - 4 Level Grayscale
// Adafruit tutorial: https://learn.adafruit.com/adafruit-eink-display-breakouts?view=all#grayscale-29-overview
// 2.9" grayscale display with 296x128 pixels
// MicroSD socket

#include "Adafruit_ThinkInk.h"

// Below configured for M0/M4
#define EPD_DC      10 // can be any pin, but required!
#define EPD_CS      9  // can be any pin, but required!
#define EPD_BUSY    -1  // can set to -1 to not use a pin (will wait a fixed delay)
#define SRAM_CS     6  // can set to -1 to not use a pin (uses a lot of RAM!)
#define EPD_RESET   -1  // can set to -1 and share with chip Reset (can't deep sleep)

// 2.9" Grayscale Featherwing or Breakout:
ThinkInk_290_Grayscale4_T5 display(EPD_DC, EPD_RESET, EPD_CS, SRAM_CS, EPD_BUSY);

#define COLOR1 EPD_BLACK
#define COLOR2 EPD_LIGHT
#define COLOR3 EPD_DARK

// Each pixel can be white, light gray, dark gray or black.
// Update time is only about 1 second (other displays take 15 sec). 

/////////////////////////////////////////////////////////////////////////


void setup() {

  // ThinkInk 290 Grayscale4 T5 Display
  // Adafruit EPD full update test in mono & grayscale
  // 296x128 pixels
  // See also:  Adafruit Graphics Primatives:  https://learn.adafruit.com/adafruit-gfx-graphics-library/graphics-primitives
  //            Adafruit GFX Graphics Library: https://learn.adafruit.com/adafruit-gfx-graphics-library?view=all
  

  display.begin(THINKINK_GRAYSCALE4); // grayscale mode
  //display.clearBuffer();
  //display.display();
  //delay(5000);


  // From Adafruit.EPD.h
  //  .begin()
  //  .drawPixel()
  //  .clearBuffer()
  //  .clearDisplay()
  //  .setBlackBuffer()
  //  .setColorBuffer
  //  .display()

  // From Adafruit_GFX
  //  .setTextSize()  1 is default 6x8, 2 is 12x16, 3 is 18x24, etc
  //  .setCursor(x, y)    coordinates in pixels
  

} // setup()


void loop() {

  // With .setTextSize(1), you get 18 rows of 48 characters/line
  // Characters are 6 px wide x 6 px tall  (VERY SMALL)
  // With spacing between rows and frame, start text at:
  //  (1,6), (1,8), (1,15), (1,22), (1,29), (1,36), (1,43), (1,50), (1,57), (1,57), (1,64), (1,71), (1,78), (1,85), (1,92), (1,99), (1,106), (1,113), (1,120)
  display.clearBuffer();
  display.setTextSize(1);
  display.setTextColor(EPD_BLACK);  // EPD_BLACK, EPD_DARK, EPD_LIGHT

  display.setCursor(1,8); 
  display.print("0123456789012345678901234567890123456789012345678");  // .setTextSize(1);
  
  display.setCursor(1,22); 
  display.print("0123456789012345678901234567890123456789012345678");  // .setTextSize(1);

  display.setCursor(1,36); 
  display.print("0123456789012345678901234567890123456789012345678");  // .setTextSize(1);

  display.setCursor(1,50); 
  //     .print("0123456789012345678901234567890123456789012345678");  // .setTextSize(1);
  display.print("          18 rows x 48 characters/row");  // .setTextSize(1);
  
  display.setCursor(1,64); 
  display.print("0123456789012345678901234567890123456789012345678");  // .setTextSize(1);
  
  display.setCursor(1,78); 
  //     .print("0123456789012345678901234567890123456789012345678");  // .setTextSize(1);
  display.print("Write on every other line to improve readability");  // .setTextSize(1);
  
  display.setCursor(1,92); 
  display.print("0123456789012345678901234567890123456789012345678");  // .setTextSize(1);
  
  display.setCursor(1,106); 
  display.print("0123456789012345678901234567890123456789012345678");  // .setTextSize(1);
    
  display.setCursor(1,120); 
  display.print("0123456789012345678901234567890123456789012345678");  // .setTextSize(1);
    
  display.display();
  delay(10000);


  // With .setTextSize(2), you get 7 rows of 23 characters/line
  // Characters are 12 px wide x 14 px tall
  // With spacing between rows and frame, start text at:
  //  (4,6), (4,23), (4,40), (4,56), (4,74), (4,91), (4,108)
  display.clearBuffer();
  display.setTextSize(2);
  display.setTextColor(EPD_BLACK);  // EPD_BLACK, EPD_DARK, EPD_LIGHT
  // (6,0),(6,14),(6,28),(6,42),(6,56),(6,70),(6,84),(6,96)
  display.setCursor(4,6);  // top left
  //     .print("012345678901234567890123");  // .setTextSize(2);
  display.print("012345678901234567890123");  // .setTextSize(2);

  display.setCursor(4,23); 
  //     .print("012345678901234567890123");  // .setTextSize(2);
  display.print("  23 characters wide");  // .setTextSize(2);

  display.setCursor(4,40); 
  //     .print("012345678901234567890123");  // .setTextSize(2);
  display.print("  7 rows with spacing");  // .setTextSize(2);

  display.setCursor(4,57);  
  //     .print("012345678901234567890123");  // .setTextSize(2);
  display.print("       EPD_BLACK");  // .setTextSize(2);

  display.setCursor(4,74);  
  display.setTextColor(EPD_DARK);  // EPD_BLACK, EPD_DARK, EPD_LIGHT
  //     .print("012345678901234567890123");  // .setTextSize(2);
  display.print("       EPD_DARK");  // .setTextSize(2);

  display.setCursor(4,91);  
  display.setTextColor(EPD_LIGHT);  // EPD_BLACK, EPD_DARK, EPD_LIGHT
  //     .print("012345678901234567890123");  // .setTextSize(2);
  display.print("       EPD_LIGHT");  // .setTextSize(2);

  display.setCursor(4,108);  
  display.setTextColor(EPD_BLACK);  // EPD_BLACK, EPD_DARK, EPD_LIGHT
  //     .print("012345678901234567890123");  // .setTextSize(2);
  display.print("012345678901234567890123");  // .setTextSize(2);
  
  display.display();
  delay(10000);

  // With .setTextSize(3), you get five rows of 15 characters/line
  // Characters are 20 px tall
  // With spacing between rows and frame, start text at:
  //    (5,6), (6,30), (6,54), (6,78), 6,102)
  display.clearBuffer();
  display.setTextSize(3);
  display.setTextColor(EPD_BLACK);  // EPD_BLACK, EPD_DARK, EPD_LIGHT
  
  display.setCursor(6,6);  // top left
  //     .print("0123456789012345");  // .setTextSize(3);
  display.print("0123456789012345");  // .setTextSize(3);

  display.setCursor(6,30); 
  //     .print("0123456789012345");  // .setTextSize(3);
  display.print(" 14 chars wide");  // .setTextSize(3);

  display.setCursor(6,54); 
  //     .print("0123456789012345");  // .setTextSize(3);
  display.print("chars 20 px tall");  // .setTextSize(3);

  display.setCursor(6,78); 
  //     .print("0123456789012345");  // .setTextSize(3);
  display.print("  5 rows tall ");  // .setTextSize(3);

  display.setCursor(6,102); 
  display.print("0123456789012345");  // .setTextSize(3);

  display.display();


  delay(10000);
  // Mechatronic Solutions LLC splash screen...
  display.clearBuffer();
  display.setTextSize(3);
  display.setTextColor(EPD_BLACK);  // EPD_BLACK, EPD_DARK, EPD_LIGHT
  
  display.setCursor(6,6);  // top left
  //     .print("0123456789001234");  // .setTextSize(3);

  display.setCursor(6,30); 
  //     .print("0123456789001234");  // .setTextSize(3);
  display.print("  Mechatronic");  // .setTextSize(3);

  display.setCursor(6,54); 
  //     .print("0123456789001234");  // .setTextSize(3);

  display.setCursor(6,78); 
  //     .print("0123456789001234");  // .setTextSize(3);
  display.print(" Solutions LLC");  // .setTextSize(3);

  display.setCursor(6,102); 

  display.display();
  delay(5000);


} // loop()

 

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Projects

FeatherWing