Introduction

This is an ESP32-integrated 2.13”e-ink display with built-in WiFi and Bluetooth functions that can connect to Alibaba Cloud to achieve remote display control. It supports controlling other devices via its IO ports, which greatly saves development cost. This e-ink display module can clearly display Chinese characters, pattern, English in black and white. When powered off, the display will continue to display the last screen. In addition, it features low power consumption and a wide view angle.

With a resolution of 250*122, this product is very suitable for displaying static pattern or text, for instance, price tag, name badge, message board, etc. When connected to WiFi, it can be turned into a calendar, electronic clock, weather forecast display, and so on.

Specification

Board Overview

PinOut

Board Overview

Tutorial

Requirements

Install Development Board Driver

  1. Open Arduino IDE, add the download address of the development driver. Select File->Preferences in the menu(or use keyboard shortcut).

Arduino IDE 1

  1. Click the icon at the right of the Additional Boards Manager URLs.

Arduino IDE 2

  1. Copy the URL address and paste it to the last line in the pop-up box: https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json

URL address

  1. Click "OK" in the Additional Boards Manager URLs and Preferences.

  2. Select Tools->Board->Boards Manager in the menu.

Boards Manager

  1. The boards Manager will pop up, and the board information will be updated automatically.

Board Manager

  1. Search "ESP32" when the update completed. Select the latest version of development board, and click "Install" to install the driver.

Install Driver

  1. Installation done!

Installation Done

  1. Select Tools->Board->ESP32 Pico Kit, now you can burn programs into the board or check the serail printed data.

ESP32 Pico Kit

Example 1: display image and characters

// include library, include base class, make path known
#include <GxEPD.h>
#include "SD.h"
#include "SPI.h"

// #include <GxGDE0213B72B/GxGDE0213B72B.h>       // 2.13" b/w
//#include <GxGDEH0213B73/GxGDEH0213B73.h>  // 2.13" b/w newer panel
//#include <GxGDE0213B72/GxGDE0213B72.h>
#include <GxGDEH0213B72/GxGDEH0213B72.h>
int bmpWidth = 232, bmpHeight = 52;
//width:150,height:39
const unsigned char DFRobot[] = {0x00,0x00,0x00,0x7C,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x7E,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFE,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFE,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7E,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x7C,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x38,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x7C,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x03,0xFF,
0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0xFF,0xE0,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x78,0x00,0x3F,0xFF,0xF8,0x00,0x3C,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0xFC,0x00,0x7F,0xFF,0xFE,0x00,0x7E,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0xFE,0x01,0xFF,0xFF,0xFF,0x00,0x7F,0x00,0x00,0x7F,0xFE,0x00,0x1F,0xFF,0xFE,0x7F,
0xFF,0x80,0x3F,0xFF,0x03,0xFF,0xFC,0x01,0xFF,0xF8,0x3F,0xFF,0xFC,0xFE,0x07,0xFF,
0xFF,0xFF,0xC0,0xFF,0x00,0x00,0x7F,0xFF,0xF0,0x1F,0xFF,0xFF,0x7F,0xFF,0xF1,0xFF,
0xFF,0xE3,0xFF,0xFF,0x0F,0xFF,0xFF,0x7F,0xFF,0xFC,0xFF,0x9F,0xFF,0xFF,0xFF,0xF3,
0xFE,0x00,0x00,0x7F,0xFF,0xFC,0x1F,0xFF,0xFF,0x7F,0xFF,0xF1,0xFF,0xFF,0xF3,0xFF,
0xFF,0x9F,0xFF,0xFF,0x7F,0xFF,0xFC,0x7F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFC,0x00,0x00,
0x7F,0xFF,0xFE,0x1F,0xFF,0xFF,0x7F,0xFF,0xF3,0xFF,0xFF,0xF3,0xFF,0xFF,0x9F,0xFF,
0xFF,0x7F,0xFF,0xFC,0x33,0xFF,0xFF,0xFF,0xFF,0xFF,0x98,0x00,0x00,0x7F,0xFF,0xFF,
0x1F,0xFF,0xFF,0x78,0x00,0xFB,0xC0,0x00,0xF3,0xC0,0x07,0x9E,0x00,0x07,0x80,0x38,
0x00,0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x7F,0xFF,0xFF,0x1F,0xFF,0xFF,
0x78,0x00,0xFB,0xC0,0x00,0xF3,0xC0,0x07,0x9E,0x00,0x07,0x80,0x3C,0x00,0x00,0x7F,
0xFF,0xFF,0xFF,0xFE,0x00,0x00,0x00,0x7E,0x00,0x7F,0x9F,0x80,0x00,0x78,0x00,0xFB,
0xC0,0x00,0xF3,0xC0,0x07,0x9E,0x00,0x07,0x80,0x3C,0x00,0x00,0x7F,0xFF,0xFF,0xFF,
0xFE,0x00,0x00,0x00,0x7F,0x00,0x3F,0x9F,0x80,0x00,0x78,0x00,0xFB,0xC0,0x00,0xF3,
0xC0,0x07,0x9E,0x00,0x07,0x80,0x3C,0x00,0x00,0x7F,0xFF,0xFF,0xFF,0xFE,0x00,0x00,
0x00,0x7F,0x00,0x1F,0x9F,0xFF,0xF8,0x78,0x00,0xFB,0xC0,0x00,0xF3,0xFF,0xFF,0x9E,
0x00,0x07,0x80,0x3C,0x00,0x00,0x7F,0xFF,0xFF,0xFF,0xFE,0x00,0x00,0x00,0x7F,0x00,
0x1F,0x9F,0xFF,0xF8,0x7F,0xFF,0xF3,0xC0,0x00,0xF3,0xFF,0xFE,0x1E,0x00,0x07,0x80,
0x3C,0x00,0x00,0x7F,0xFF,0xFF,0xFF,0xFE,0x00,0x00,0x00,0x7F,0x00,0x1F,0x9F,0xFF,
0xF8,0x7F,0xFF,0xF3,0xC0,0x00,0xF3,0xFF,0xFF,0x1E,0x00,0x07,0x80,0x3C,0x00,0x00,
0x7F,0xFF,0xFF,0xFF,0xFE,0x00,0x00,0x00,0x7F,0x00,0x3F,0x9F,0xFF,0xF8,0x7F,0xFF,
0xE3,0xC0,0x00,0xF3,0xC0,0x07,0x9E,0x00,0x07,0x80,0x3C,0x00,0x00,0x7F,0xFF,0xFF,
0xFF,0xFE,0x00,0x00,0x00,0x7F,0x00,0x3F,0x9F,0xFF,0xF8,0x78,0x3E,0x03,0xC0,0x00,
0xF3,0xC0,0x07,0x9E,0x00,0x07,0x80,0x3C,0x00,0x00,0x60,0x00,0x00,0x00,0x0E,0x00,
0x00,0x00,0x7E,0x00,0xFF,0x9F,0x80,0x00,0x78,0x1F,0x03,0xC0,0x00,0xF3,0xC0,0x07,
0x9E,0x00,0x07,0x80,0x3C,0x00,0x00,0x6F,0xFF,0xFF,0xFF,0xEE,0x00,0x00,0x00,0x7F,
0xFF,0xFF,0x1F,0xC0,0x00,0x78,0x0F,0x83,0xC0,0x00,0xF3,0xC0,0x07,0x9E,0x00,0x07,
0x80,0x3C,0x00,0x00,0x6F,0xFF,0xFF,0xFF,0xEE,0x00,0x00,0x00,0x7F,0xFF,0xFF,0x1F,
0xC0,0x00,0x78,0x07,0xC3,0xC0,0x00,0xF3,0xC0,0x07,0x9E,0x00,0x07,0x80,0x3C,0x00,
0x00,0x6C,0x00,0x00,0x00,0x6E,0x00,0x00,0x00,0x7F,0xFF,0xFE,0x1F,0xC0,0x00,0x78,
0x03,0xE3,0xFF,0xFF,0xF3,0xFF,0xFF,0x9F,0xFF,0xFF,0x00,0x3C,0x00,0x00,0x6C,0x00,
0x00,0x00,0x6E,0x00,0x00,0x00,0x7F,0xFF,0xFC,0x1F,0xC0,0x00,0x78,0x01,0xF9,0xFF,
0xFF,0xF3,0xFF,0xFF,0x9F,0xFF,0xFF,0x00,0x3C,0x00,0x00,0x6C,0x00,0x00,0x00,0x6E,
0x00,0x00,0x00,0x7F,0xFF,0xF0,0x1F,0xC0,0x00,0x78,0x00,0xFD,0xFF,0xFF,0xE3,0xFF,
0xFF,0x0F,0xFF,0xFF,0x00,0x3C,0x00,0x00,0x6E,0x00,0x00,0x00,0xEE,0x00,0x00,0x00,
0x7F,0xFE,0x00,0x1F,0xC0,0x00,0x78,0x00,0x7C,0x3F,0xFF,0x03,0xFF,0xF8,0x03,0xFF,
0xF8,0x00,0x38,0x00,0x00,0x67,0xC0,0x00,0x07,0xCE,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x70,0xF8,0x00,0x3E,0x1E,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7E,
0x1F,0x01,0xF0,0xFE,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7F,0xC3,0xFF,0x87,
0xFE,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7F,0xF8,0x3C,0x3F,0xFE,0x00,0x00,
0x00,0x7E,0x7E,0xD0,0xBF,0x0F,0xD8,0x9F,0x83,0xEC,0x5F,0xB1,0x7F,0x7E,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x7F,0xFF,0x81,0xFF,0xFC,0x00,0x00,0x00,0x7F,0x7E,
0xD9,0xBF,0x0F,0xD8,0x9F,0x83,0xEC,0x5F,0xB1,0x7F,0x7E,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x3F,0xFF,0xFF,0xFF,0xFC,0x00,0x00,0x00,0x63,0x62,0xD9,0xA0,0x03,
0x1F,0x90,0x02,0x0C,0x46,0x31,0x63,0x40,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x1F,0xFF,0xFF,0xFF,0xF0,0x00,0x00,0x00,0x63,0x7E,0xCF,0x3E,0x03,0x1F,0x9F,0x03,
0xCC,0x46,0x31,0x7F,0x78,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x07,0xFF,0xFF,
0xFF,0xC0,0x00,0x00,0x00,0x63,0x6C,0xCF,0x30,0x03,0x18,0x98,0x03,0xCC,0x46,0x21,
0x6E,0x40,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0xFF,0xFF,0xFF,0x80,0x00,
0x00,0x00,0x7F,0x66,0xC6,0x3F,0x03,0x18,0x9F,0x83,0x0F,0xC6,0x3F,0x63,0x7E,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0xFE,0x00,0x00,0x00,0x00,0x7C,
0x62,0xC6,0x3F,0x03,0x18,0x9F,0x82,0x07,0xC6,0x1F,0x61,0x7E,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x3F,0xFF,0xF8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x0F,0xFF,0xE0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x03,
0xFF,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0xFF,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7C,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00};
// FreeFonts from Adafruit_GFX
#include <Fonts/FreeMonoBold9pt7b.h>
#include <Fonts/FreeMonoBold12pt7b.h>
#include <Fonts/FreeMonoBold18pt7b.h>
#include <Fonts/FreeMonoBold24pt7b.h>


#include <GxIO/GxIO_SPI/GxIO_SPI.h>
#include <GxIO/GxIO.h>

#define SPI_MOSI 23
#define SPI_MISO -1
#define SPI_CLK 18

#define ELINK_SS 5
#define ELINK_BUSY 4
#define ELINK_RESET 16
#define ELINK_DC 17

#define SDCARD_SS 13
#define SDCARD_CLK 14
#define SDCARD_MOSI 15
#define SDCARD_MISO 2

#define BUTTON_PIN 39


GxIO_Class io(SPI, /*CS=5*/ ELINK_SS, /*DC=*/ ELINK_DC, /*RST=*/ ELINK_RESET);
GxEPD_Class display(io, /*RST=*/ ELINK_RESET, /*BUSY=*/ ELINK_BUSY);

SPIClass sdSPI(VSPI);


const char *Website = "www.dfrobot.com";
bool sdOK = false;
int startX = 9, startY = 20;

void setup()
{
  Serial.begin(115200);
  Serial.println();
  Serial.println("setup");
  SPI.begin(SPI_CLK, SPI_MISO, SPI_MOSI, ELINK_SS);
  display.init(); // enable diagnostic output on Serial

  display.setRotation(1);
  display.fillScreen(GxEPD_WHITE);
  display.setTextColor(GxEPD_BLACK);
  display.setFont(&FreeMonoBold12pt7b);
  display.setCursor(0, 0);

  sdSPI.begin(SDCARD_CLK, SDCARD_MISO, SDCARD_MOSI, SDCARD_SS);

  if (!SD.begin(SDCARD_SS, sdSPI)){
  sdOK = false;
  } else {
  sdOK = true;
  }

  display.fillScreen(GxEPD_WHITE);

  display.drawBitmap(DFRobot, startX, startY,  bmpWidth, bmpHeight, GxEPD_BLACK);

  display.setCursor(20,95);

  display.println(Website);

  display.setTextColor(GxEPD_BLACK);

  display.update();

  // goto sleep
  esp_sleep_enable_ext0_wakeup((gpio_num_t)BUTTON_PIN, LOW);

  esp_deep_sleep_start();
}

void loop()
{
}

Expected Result

Result 1

Example 2: get NTP time and display on e-ink screen

Get the current time from NTP server and display on the e-ink screen.

Note: please revise ssid and password when uploading codes.

#include <GxEPD.h>
#include "SD.h"
#include "SPI.h"


#include <WiFi.h>
#include "time.h"

const char* ssid       = "*****";//wlan information
const char* password   = "*****";

const char* ntpServer = "ntp.ntsc.ac.cn";//local ntp server
const uint32_t  gmtOffset_sec = 8*3600;  //GMT+08:00
const uint16_t   daylightOffset_sec = 0;


#include <GxGDEH0213B72/GxGDEH0213B72.h>
#include <Fonts/FreeMonoBold18pt7b.h>


#include <GxIO/GxIO_SPI/GxIO_SPI.h>
#include <GxIO/GxIO.h>

#define SPI_MOSI 23
#define SPI_MISO -1
#define SPI_CLK 18

#define ELINK_SS 5
#define ELINK_BUSY 4
#define ELINK_RESET 16
#define ELINK_DC 17

#define SDCARD_SS 13
#define SDCARD_CLK 14
#define SDCARD_MOSI 15
#define SDCARD_MISO 2

#define BUTTON_PIN 39

typedef enum
{
    RIGHT_ALIGNMENT = 0,
    LEFT_ALIGNMENT,
    CENTER_ALIGNMENT,
} Text_alignment;



GxIO_Class io(SPI, /*CS=5*/ ELINK_SS, /*DC=*/ ELINK_DC, /*RST=*/ ELINK_RESET);
GxEPD_Class display(io, /*RST=*/ ELINK_RESET, /*BUSY=*/ ELINK_BUSY);

SPIClass sdSPI(VSPI);

const uint8_t Whiteboard[1700] = {0x00};

uint16_t Year = 0 , Month = 0 , Day = 0 , Hour = 0 , Minute = 0 , Second = 0;
char Date[]={"2000/01/01"};
char Time[]={"00:00:00"};
bool sdOK = false;

void displayText(const String &str, uint16_t y, uint8_t alignment)
{
  int16_t x = 0;
  int16_t x1, y1;
  uint16_t w, h;
  display.setCursor(x, y);
  display.getTextBounds(str, x, y, &x1, &y1, &w, &h);

  switch (alignment)
  {
  case RIGHT_ALIGNMENT:
    display.setCursor(display.width() - w - x1, y);
    break;
  case LEFT_ALIGNMENT:
    display.setCursor(0, y);
    break;
  case CENTER_ALIGNMENT:
    display.setCursor(display.width() / 2 - ((w + x1) / 2), y);
    break;
  default:
    break;
  }
  display.println(str);
}

void getTimeFromNTP()
{
  configTime(gmtOffset_sec, daylightOffset_sec, ntpServer);
  struct tm timeinfo;
  if(!getLocalTime(&timeinfo)){
    Serial.println("Failed to obtain time");
    return;
  }

  Date[2] = (timeinfo.tm_year - 100) / 10 % 10 + '0';
  Date[3] = (timeinfo.tm_year - 100) % 10 + '0';
  Date[5] = (timeinfo.tm_mon + 1) / 10 % 10 + '0';
  Date[6] = (timeinfo.tm_mon + 1) % 10 + '0';
  Date[8] = timeinfo.tm_mday / 10 % 10 + '0';
  Date[9] = timeinfo.tm_mday % 10 + '0';

  Time[0] = timeinfo.tm_hour / 10 % 10 + '0';
  Time[1] = timeinfo.tm_hour % 10 + '0';
  Time[3] = timeinfo.tm_min / 10 % 10 + '0';
  Time[4] = timeinfo.tm_min % 10 + '0';
  Time[6] = timeinfo.tm_sec / 10 % 10 + '0';
  Time[7] = timeinfo.tm_sec % 10 + '0';

  Serial.println(Date);
  Serial.println(Time);
  Serial.println(" ");
}

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

  Serial.printf("Connecting to %s ", ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println(" CONNECTED");

  SPI.begin(SPI_CLK, SPI_MISO, SPI_MOSI, ELINK_SS);
  display.init(); // enable diagnostic output on Serial

  display.setRotation(1);
  display.fillScreen(GxEPD_WHITE);
  display.setTextColor(GxEPD_BLACK);
  display.setFont(&FreeMonoBold18pt7b);
  display.setCursor(0, 0);

  sdSPI.begin(SDCARD_CLK, SDCARD_MISO, SDCARD_MOSI, SDCARD_SS);

  if (!SD.begin(SDCARD_SS, sdSPI)) {
    sdOK = false;
  } else {
    sdOK = true;
  }

  display.fillScreen(GxEPD_WHITE);
  display.update();
}

void loop()
{
  getTimeFromNTP();
  displayText(String(Date), 60, CENTER_ALIGNMENT);
  displayText(String(Time), 90, CENTER_ALIGNMENT);
  display.updateWindow(22, 30,  222,  90, true);
  display.drawBitmap(Whiteboard, 22, 31,  208, 60, GxEPD_BLACK);
}

Expected Results

Result 2

FAQ

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