IL0373F ESP8266 NodeMCU

main.cpp

#include "main.hpp"

/*
VCC -> 3V3
GND -> GND
D/C -> D3
SDI -> DD7
CS -> D8 (SS)
CLK -> D5
BUSY -> D2
*/

// We don't have a reset pin
#define RST -1

GxIO_Class io(SPI, /* CS */ SS, /* D/C */ D3, RST);
GxEPD_Class display(io, RST, /* BUSY */ D2);

// More:
// https://github.com/ZinggJM/GxEPD/tree/master/examples

void setup() {
  display.init();
  display.setRotation(1);
  display.setFont(&FreeMonoBold9pt7b);
}

void loop() {

  const GFXfont* f = &FreeMonoBold9pt7b;
  display.fillScreen(GxEPD_WHITE);
  display.setTextColor(GxEPD_BLACK);
  display.setFont(f);
  display.setCursor(0, 0);
  display.println();
  display.setTextColor(GxEPD_RED);
  display.print(millis() / 1000);
  display.println(" s.");
  display.setTextColor(GxEPD_BLACK);
  // display.println(" !\"#$%&'()*+,-./");
  display.println("0123456789:;<=>?");
  // display.println("@ABCDEFGHIJKLMNO");
  display.setTextColor(GxEPD_RED);
  display.println("`abcdefghijklmno");
  delay(10 * 1000);
  
  display.print(millis() / 1000);
  display.println(" s.");
  display.update();

  delay(5 * 1000);
}

main.hpp

#pragma once

#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <GxEPD.h>
#include <GxGDEW0213Z16/GxGDEW0213Z16.h>
#include <GxIO/GxIO_SPI/GxIO_SPI.h>
#include <GxIO/GxIO.h>
#include <Fonts/FreeMonoBold9pt7b.h>

// https://s3.amazonaws.com/randomnerdtutorials/jhdfsASDFJEWJjsdfajdsafJDAFSJafd/ESP8266_Pinout_Diagrams.pdf
#define D0 16
#define D1 5
#define D2 4
#define D3 0
#define D4 2
#define D5 14
#define D6 12
#define D7 13
#define D8 15