d32_pro.ino

// mapping suggestion for ESP32, e.g. LOLIN32 D32 PRO
// BUSY -> 15
// RST -> 2
// DC -> 0
// CS -> 5
// CLK -> SCK(18)
// DIN -> MOSI(23)
// GND -> GND
// 3.3V -> 3.3V
// note: use explicit value for CS
//as SS is re-defined to TF_CS(4) in pins_arduino.h for Board: "LOLIN D32 PRO"
#define ENABLE_GxEPD2_GFX 0

#include <GxEPD2_BW.h>
#include <GxEPD2_3C.h>
#include <Fonts/FreeMonoBold9pt7b.h>

//GxEPD2_BW<GxEPD2_154, GxEPD2_154::HEIGHT> display(GxEPD2_154(/*CS=5*/ 5, /*DC=*/ 0, /*RST=*/ 2, /*BUSY=*/ 15));

// mapping suggestion for ESP32, e.g. TTGO T8 ESP32-WROVER
// BUSY -> 4, RST -> 0, DC -> 2, CS -> SS(5), CLK -> SCK(18), DIN -> MOSI(23), GND -> GND, 3.3V -> 3.3V
// for use with Board: "ESP32 Dev Module":
GxEPD2_BW<GxEPD2_154, GxEPD2_154::HEIGHT> display(GxEPD2_154(/*CS=5*/ 5, /*DC=*/ 2, /*RST=*/ 0, /*BUSY=*/ 4));

#define BUILTIN_LED 21

void setup() {
  pinMode(BUILTIN_LED, OUTPUT);
  Serial.begin(115200);
  Serial.println();
  Serial.println("setup");
  delay(100);
  display.init(115200);
  delay(1000);
  helloWorld();
  delay(5000);
}

void loop() {
  Serial.println("loop ...");
  blackScreen();
  digitalWrite(BUILTIN_LED, HIGH);
  delay(5000);
  helloWorld();
  digitalWrite(BUILTIN_LED, LOW);
  delay(5000);
}

const char HelloWorld[] = "Hello World!";
const char HelloArduino[] = "Hello Arduino!";
const char HelloEpaper[] = "Hello E-Paper!";

void helloWorld()
{
  Serial.println("helloWorld");
  display.setRotation(1);
  display.setFont(&FreeMonoBold9pt7b);
  display.setTextColor(GxEPD_BLACK);
  int16_t tbx, tby; uint16_t tbw, tbh;
  display.getTextBounds(HelloWorld, 0, 0, &tbx, &tby, &tbw, &tbh);
  // center bounding box by transposition of origin:
  uint16_t x = ((display.width() - tbw) / 2) - tbx;
  uint16_t y = ((display.height() - tbh) / 2) - tby;
  display.setFullWindow();
  display.firstPage();
  do
  {
    display.fillScreen(GxEPD_WHITE);
    display.setCursor(x, y);
    display.print(HelloWorld);
    display.setCursor(0,0);
    display.print(HelloEpaper);
  }
  while (display.nextPage());
  Serial.println("helloWorld done");
}

void blackScreen() {
  display.firstPage();
  do
  {
    display.fillScreen(GxEPD_BLACK);
  }
  while (display.nextPage()); 
}