Documentation

// 2.9" e-Paper 296x128 - Arduino Example (GxEPD2)
// CS->10, DC->9, RST->8, BUSY->7, DIN->11, CLK->13
// Libraries: GxEPD2 + Adafruit GFX

#include <GxEPD2_BW.h>
#include <Fonts/FreeSansBold12pt7b.h>

// V2 2.9" panel; if your screen stays blank try GxEPD2_290 instead
GxEPD2_BW<GxEPD2_290_T94_V2, GxEPD2_290_T94_V2::HEIGHT>
  display(GxEPD2_290_T94_V2(10, 9, 8, 7));   // CS, DC, RST, BUSY

void setup() {
  display.init(115200);
  display.setRotation(1);                    // landscape 296x128
  display.setFont(&FreeSansBold12pt7b);
  display.setTextColor(GxEPD_BLACK);

  display.setFullWindow();
  display.firstPage();
  do {
    display.fillScreen(GxEPD_WHITE);
    display.setCursor(10, 40);
    display.print("ShillehTek");
    display.setCursor(10, 75);
    display.print("2.9\" e-Paper");
    display.drawRect(10, 95, 276, 20, GxEPD_BLACK);
    display.fillRect(10, 95, 180, 20, GxEPD_BLACK);   // fake gauge
  } while (display.nextPage());

  display.hibernate();                       // ~0 power, image stays
}

void loop() {}

// 2.9" e-Paper - ESP32 partial-refresh counter (GxEPD2)
// CS->5, DC->17, RST->16, BUSY->4, DIN->23, CLK->18

#include <GxEPD2_BW.h>
#include <Fonts/FreeMonoBold18pt7b.h>

GxEPD2_BW<GxEPD2_290_T94_V2, GxEPD2_290_T94_V2::HEIGHT>
  display(GxEPD2_290_T94_V2(5, 17, 16, 4));

int counter = 0;

void setup() {
  display.init(115200);
  display.setRotation(1);
  display.setFont(&FreeMonoBold18pt7b);
  display.setTextColor(GxEPD_BLACK);

  display.setFullWindow();          // one full refresh at boot
  display.firstPage();
  do {
    display.fillScreen(GxEPD_WHITE);
    display.setCursor(20, 50);
    display.print("Counter:");
  } while (display.nextPage());
}

void loop() {
  // fast partial update of just the number area
  display.setPartialWindow(20, 70, 200, 40);
  display.firstPage();
  do {
    display.fillScreen(GxEPD_WHITE);
    display.setCursor(20, 100);
    display.print(counter);
  } while (display.nextPage());

  counter++;
  delay(3000);
  if (counter % 20 == 0) display.refresh();   // periodic full clean
}

#!/usr/bin/env python3
# 2.9" e-Paper - Raspberry Pi Example (Waveshare epd library)
# Setup once:
#   git clone https://github.com/waveshareteam/e-Paper
#   cd e-Paper/RaspberryPi_JetsonNano/python && sudo python3 setup.py install
#   pip3 install pillow

from waveshare_epd import epd2in9_V2
from PIL import Image, ImageDraw, ImageFont
import time

epd = epd2in9_V2.EPD()
epd.init()
epd.Clear(0xFF)

font_big = ImageFont.truetype(
    "/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf", 28)
font_small = ImageFont.truetype(
    "/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf", 16)

# landscape canvas: width=296, height=128
image = Image.new("1", (epd.height, epd.width), 255)
draw = ImageDraw.Draw(image)

draw.text((10, 8), "ShillehTek", font=font_big, fill=0)
draw.text((10, 48), "2.9 inch e-Paper on Raspberry Pi", font=font_small, fill=0)
draw.text((10, 72), time.strftime("%Y-%m-%d %H:%M"), font=font_small, fill=0)
draw.rectangle((10, 100, 286, 118), outline=0)
draw.rectangle((10, 100, 190, 118), fill=0)

epd.display(epd.getbuffer(image))
epd.sleep()          # deep sleep - image remains
print("Displayed and sleeping.")

# 2.9" e-Paper - Pico MicroPython Example
# Driver: copy Pico_ePaper-2.9.py from Waveshare's Pico_ePaper_Code repo
#   to the Pico as epaper29.py (it contains class EPD_2in9)
# Wiring here matches the tab: CS=9, DC=8, RST=12, BUSY=13, SCK=10, MOSI=11

from epaper29 import EPD_2in9
import time

epd = EPD_2in9()          # driver sets up SPI1 + pins
epd.Clear(0xff)

# The driver exposes a framebuf: draw with standard framebuf calls
epd.fill(0xff)
epd.text("ShillehTek", 8, 8, 0x00)
epd.text("e-Paper on Pico", 8, 24, 0x00)
epd.text("No power needed", 8, 40, 0x00)
epd.text("to keep this text!", 8, 56, 0x00)
epd.rect(8, 76, 120, 12, 0x00)
epd.fill_rect(8, 76, 80, 12, 0x00)

epd.display(epd.buffer)
time.sleep(2)
epd.sleep()               # image persists with zero power
print("Displayed and sleeping.")