Problem 1.54 ePaper | ESP-32 Wifi Kit V3

[jogoldirus]

Hello , i'm strunggling with my ePaper display to have a working code.
I tried on ESP 8266 (with success) and now must get it work on this board.

There is my code (tested with 150_BN & 154_D67 without success) :

#include <GxEPD2_BW.h> // Include the GxEPD2 library for black and white displays
#include <SPI.h>       // Include the SPI library

SPIClass hspi(HSPI);
const int EPD_CS = 36;
const int EPD_DC = 40;
const int EPD_RST = 38;
const int EPD_BUSY = 39;
const int EPD_CLK = 41;
const int EPD_MOSI = 42;
#define GxEPD2_DEBUG
// Define the display class and pass the correct resolution and pin configurations
// GxEPD2_BW<GxEPD2_150_BN, GxEPD2_150_BN::HEIGHT> display(GxEPD2_150_BN(/*CS=D8*/ EPD_CS, /*DC=D3*/ EPD_DC, /*RST=D4*/ EPD_RST, /*BUSY=D2*/ EPD_BUSY));
GxEPD2_BW<GxEPD2_154_D67, GxEPD2_154_D67::HEIGHT> display(GxEPD2_154_D67(/*CS=D8*/ EPD_CS, /*DC=D3*/ EPD_DC, /*RST=D4*/ EPD_RST, /*BUSY=D2*/ EPD_BUSY));
void test_display()
{
  Serial.println("Testing display functions...");

  // Reset the display
  Serial.println("Resetting display...");
  display.clearScreen();
  delay(100);

  // Set the display mode
  Serial.println("Setting display mode...");
  display.setRotation(1);
  display.setFullWindow();

  // Clear the display buffer
  Serial.println("Clearing display buffer...");
  display.fillScreen(GxEPD_WHITE);

  // Draw a rectangle on the display buffer
  Serial.println("Drawing rectangle...");
  display.drawRect(10, 10, 50, 30, GxEPD_BLACK);

  // Update the display with the buffer content
  Serial.println("Updating display...");
  display.display(true); // true parameter enables partial update
  delay(2000);

  Serial.println("Test complete.");
}
void setup()
{
  hspi.begin(EPD_CLK, -1, EPD_MOSI, EPD_CS); // SCK, MISO, MOSI, CS
  hspi.setFrequency(2000000);                // Set the SPI clock frequency to 2 MHz
  hspi.setDataMode(SPI_MODE0);               // Set the SPI data mode to Mode 0
  Serial.begin(115200);                      // Initialize the serial communication
  display.init(115200, true, 2, false);      // Initialize the display with the correct baud rate and SPI mode
  display.setRotation(1);                    // Set the display rotation (optional)
  Serial.println("Setup done");
}

void loop()
{
  // Fill the display buffer with white
  display.fillScreen(GxEPD_WHITE);

  // Draw a test pattern on the display buffer
  uint16_t width = display.width();
  uint16_t height = display.height();
  for (int16_t i = 0; i < width; i++)
  {
    for (int16_t j = 0; j < height; j++)
    {
      if (i < width / 2 && j < height / 2)
      {
        display.drawPixel(i, j, GxEPD_BLACK);
      }
      else if (i >= width / 2 && j >= height / 2)
      {
        display.drawPixel(i, j, GxEPD_BLACK);
      }
    }
  }

  // Update the display with the buffer content
  display.display(false); // true parameter enables partial update

  // Delay to avoid continuously refreshing the display
  delay(2000);
  // Fill the display buffer with white again to clear the previous content
  display.fillScreen(GxEPD_WHITE);
  Serial.println("Loop done");
}

Console logs :
ESP-ROM:esp32s3-20210327
Build:Mar 27 2021
rst:0x1 (POWERON),boot:0x8 (SPI_FAST_FLASH_BOOT)
SPIWP:0xee
mode:DIO, clock div:1
load:0x3fce3808,len:0x44c
load:0x403c9700,len:0xbd8
load:0x403cc700,len:0x2a80
entry 0x403c98d0
[ 10Setup done
_PowerOn : 6
_Update_Full : 1
_Update_Full : 1
_PowerOff : 1
Loop done
_PowerOn : 1
_Update_Full : 1
_PowerOff : 1
Loop done
_PowerOn : 1000
_Update_Full : 1
_PowerOff : 1
Loop done
_PowerOn : 2000
_Update_Full : 1
_PowerOff : 1
Loop done

Thanks for help ! Have a good day

Reference :
Screen with modules (Waveshare ePaper 1.54inch V2 FPC-8101) : https://www.waveshare.com/1.54inch-e-paper-module.htm
Board Heltec ESP-32 Wifi Kit V3 : WiFi Kit 32 (V3) – Heltec Automation

[ZinggJM]

@jogoldirus , Hi, welcome to the forum!

You need a connection module with the booster circuit for the panel driving voltages. E.g.
24 pin serial ePaper screen HAT adapter board, DESPI-C02_Good Display (good-display.com).
-jz-

[jogoldirus]

Hi !
I show it and if i understand it's for driver or for resistance ?
I have one of it but throught drivers wasn't mandatory with the library GxEPD2 and provided by GxEPD2 from software
For industrial reason, i try (and need) to avoid HAT or hardware drivers

[ZinggJM]

Look at the schematics of the DESPI-C02 and at the reference circuit of the panel specs.