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‎Bare_eInk_Guide/212x104_flex_monochrome_arduino/.uno.test.only‎ renamed to ‎Bare_eInk_Guide/212x104_flexible_monochrome_arduino/.uno.test.only‎

File renamed without changes.

‎Bare_eInk_Guide/212x104_flex_monochrome_arduino/212x104_flex_monochrome_arduino.ino‎ renamed to ‎Bare_eInk_Guide/212x104_flexible_monochrome_arduino/212x104_flexible_monochrome_arduino.ino‎

File renamed without changes.

‎Bare_eInk_Guide/416x240_monochrome_arduino/.uno.test.only‎

Whitespace-only changes.

‎Bare_eInk_Guide/416x240_monochrome_arduino/416x240_monochrome_arduino.ino‎

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// SPDX-FileCopyrightText: 2025 Ladyada for Adafruit Industries
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//
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// SPDX-License-Identifier: MIT
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/***************************************************
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Adafruit invests time and resources providing this open source code,
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please support Adafruit and open-source hardware by purchasing
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products from Adafruit!
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Written by Limor Fried/Ladyada for Adafruit Industries.
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MIT license, all text above must be included in any redistribution
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****************************************************/
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#include "Adafruit_ThinkInk.h"
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#ifdef ARDUINO_ADAFRUIT_FEATHER_RP2040_THINKINK // detects if compiling for
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// Feather RP2040 ThinkInk
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#define EPD_DC PIN_EPD_DC // ThinkInk 24-pin connector DC
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#define EPD_CS PIN_EPD_CS // ThinkInk 24-pin connector CS
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#define EPD_BUSY PIN_EPD_BUSY // ThinkInk 24-pin connector Busy
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#define SRAM_CS -1 // use onboard RAM
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#define EPD_RESET PIN_EPD_RESET // ThinkInk 24-pin connector Reset
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#define EPD_SPI &SPI1 // secondary SPI for ThinkInk
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#else
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#define EPD_DC 10
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#define EPD_CS 9
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#define EPD_BUSY 7 // can set to -1 to not use a pin (will wait a fixed delay)
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#define SRAM_CS 6
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#define EPD_RESET 8 // can set to -1 and share with microcontroller Reset!
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#define EPD_SPI &SPI // primary SPI
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#endif
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// 3.7" Monochrome Display with 420x240 pixels and UC8253 chipset
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ThinkInk_370_Mono_BAAMFGN display(EPD_DC, EPD_RESET, EPD_CS, SRAM_CS,
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EPD_BUSY, EPD_SPI);
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void setup() {
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Serial.begin(115200);
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while (!Serial) {
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delay(10);
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}
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Serial.println("Adafruit EPD full update test in mono");
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Serial.println("3.7 Monochrome EPD with UC8253 chipset");
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display.begin(THINKINK_MONO);
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}
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void loop() {
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Serial.println("Banner demo");
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display.clearBuffer();
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display.setTextSize(3);
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display.setCursor((display.width() - 180) / 2, (display.height() - 24) / 2);
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display.setTextColor(EPD_BLACK);
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display.print("Monochrome");
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display.display();
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delay(2000);
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Serial.println("B/W rectangle demo");
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display.clearBuffer();
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display.fillRect(display.width() / 2, 0, display.width() / 2,
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display.height(), EPD_BLACK);
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display.display();
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delay(2000);
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Serial.println("Text demo");
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// large block of text
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display.clearBuffer();
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display.setTextSize(1);
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testdrawtext(
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"Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur "
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"adipiscing ante sed nibh tincidunt feugiat. Maecenas enim massa, "
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"fringilla sed malesuada et, malesuada sit amet turpis. Sed porttitor "
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"neque ut ante pretium vitae malesuada nunc bibendum. Nullam aliquet "
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"ultrices massa eu hendrerit. Ut sed nisi lorem. In vestibulum purus a "
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"tortor imperdiet posuere. ",
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EPD_BLACK);
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display.display();
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delay(2000);
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display.clearBuffer();
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for (int16_t i = 0; i < display.width(); i += 4) {
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display.drawLine(0, 0, i, display.height() - 1, EPD_BLACK);
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}
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for (int16_t i = 0; i < display.height(); i += 4) {
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display.drawLine(display.width() - 1, 0, 0, i, EPD_BLACK);
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}
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display.display();
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delay(2000);
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}
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void testdrawtext(const char *text, uint16_t color) {
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display.setCursor(0, 0);
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display.setTextColor(color);
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display.setTextWrap(true);
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display.print(text);
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}

‎Bare_eInk_Guide/416x240_monochrome_circuitpython/code.py‎

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# SPDX-FileCopyrightText: 2025 Scott Shawcroft, written for Adafruit Industries
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# SPDX-FileCopyrightText: Copyright (c) 2021 Melissa LeBlanc-Williams for Adafruit Industries
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#
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# SPDX-License-Identifier: Unlicense
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"""Simple test script for 3.7" 240x416 monochrome display (ThinkInk_370_Mono_BAAMFGN)."""
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import time
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import board
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import busio
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import displayio
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from fourwire import FourWire
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import adafruit_uc8253
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displayio.release_displays()
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if "EPD_MOSI" in dir(board): # Feather RP2040 ThinkInk
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spi = busio.SPI(board.EPD_SCK, MOSI=board.EPD_MOSI, MISO=None)
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epd_cs = board.EPD_CS
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epd_dc = board.EPD_DC
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epd_reset = board.EPD_RESET
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epd_busy = board.EPD_BUSY
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else:
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spi = board.SPI() # Uses SCK and MOSI
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epd_cs = board.D9
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epd_dc = board.D10
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epd_reset = board.D8 # Set to None for FeatherWing
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epd_busy = board.D7 # Set to None for FeatherWing
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display_bus = FourWire(spi, command=epd_dc, chip_select=epd_cs, reset=epd_reset, baudrate=1000000)
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time.sleep(1)
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display = adafruit_uc8253.UC8253(
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display_bus,
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width=416,
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height=240,
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busy_pin=epd_busy,
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rotation=270,
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vcom_cdi=0x97,
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)
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g = displayio.Group()
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pic = displayio.OnDiskBitmap("/display-ruler-1280x720.bmp")
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t = displayio.TileGrid(pic, pixel_shader=pic.pixel_shader)
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g.append(t)
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display.root_group = g
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display.refresh()
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print("refreshed")
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time.sleep(display.time_to_refresh + 5)
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print("waited correct time")
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# Keep the display the same
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while True:
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time.sleep(10)

‎Bare_eInk_Guide/416x240_monochrome_circuitpython/display-ruler-1280x720.bmp‎

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‎Bare_eInk_Guide/416x240_monochrome_python/code.py‎

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# SPDX-FileCopyrightText: 2019 Melissa LeBlanc-Williams for Adafruit Industries
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# SPDX-License-Identifier: MIT
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"""
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ePaper Display Shapes and Text demo using the Pillow Library.
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3.7" Monochrome 416x240 display
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https://www.adafruit.com/product/6395
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"""
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import board
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import busio
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import digitalio
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from PIL import Image, ImageDraw, ImageFont
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from adafruit_epd.uc8253 import Adafruit_UC8253_Mono
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# First define some color constants
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WHITE = (0xFF, 0xFF, 0xFF)
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BLACK = (0x00, 0x00, 0x00)
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# Next define some constants to allow easy resizing of shapes and colors
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BORDER = 20
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FONTSIZE = 24
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BACKGROUND_COLOR = BLACK
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FOREGROUND_COLOR = WHITE
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TEXT_COLOR = BLACK
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# create the spi device and pins we will need
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spi = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)
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ecs = digitalio.DigitalInOut(board.CE0)
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dc = digitalio.DigitalInOut(board.D22)
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srcs = None
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rst = digitalio.DigitalInOut(board.D27)
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busy = digitalio.DigitalInOut(board.D17)
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display = Adafruit_UC8253_Mono(240, 416,
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spi,
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cs_pin=ecs,
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dc_pin=dc,
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sramcs_pin=srcs,
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rst_pin=rst,
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busy_pin=busy
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)
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display.set_black_buffer(1, True)
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display.set_color_buffer(1, True)
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display.rotation = 3
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width = display.width
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height = display.height
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image = Image.new("RGB", (width, height))
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# clear the buffer
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display.fill(WHITE)
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# Get drawing object to draw on image.
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draw = ImageDraw.Draw(image)
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# empty it
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draw.rectangle((0, 0, width, height), fill=WHITE)
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# Draw an outline box
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draw.rectangle((1, 1, width - 2, height - 2), outline=BLACK, fill=WHITE)
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# Draw some shapes.
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# First define some constants to allow easy resizing of shapes.
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padding = 15
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shape_width = 45
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top = padding
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bottom = height - padding
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# Move left to right keeping track of the current x position for drawing shapes.
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x = padding
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# Draw an ellipse.
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draw.ellipse((x, top, x + shape_width, bottom), outline=BLACK, fill=WHITE)
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x += shape_width + padding
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# Draw a rectangle.
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draw.rectangle((x, top, x + shape_width, bottom), outline=BLACK, fill=BLACK)
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x += shape_width + padding
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# Draw a triangle.
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draw.polygon(
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[(x, bottom), (x + shape_width / 2, top), (x + shape_width, bottom)],
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outline=BLACK,
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fill=BLACK,
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)
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x += shape_width + padding
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# Draw an X.
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draw.line((x, bottom, x + shape_width, top), fill=BLACK)
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draw.line((x, top, x + shape_width, bottom), fill=BLACK)
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x += shape_width + padding
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# Load default font.
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font = ImageFont.truetype("/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf", 30)
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draw.text((x, top), "Hello", font=font, fill=BLACK)
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draw.text((x, top + 30), "World!", font=font, fill=BLACK)
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# Display image.
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display.image(image)
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display.display()

‎Bare_eInk_Guide/416x240_tricolor_arduino/.uno.test.only‎

Whitespace-only changes.

‎Bare_eInk_Guide/416x240_tricolor_arduino/416x240_tricolor_arduino.ino‎

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// SPDX-FileCopyrightText: 2025 Ladyada for Adafruit Industries
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//
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// SPDX-License-Identifier: MIT
4+
5+
/***************************************************
6+
Adafruit invests time and resources providing this open source code,
7+
please support Adafruit and open-source hardware by purchasing
8+
products from Adafruit!
9+
10+
Written by Limor Fried/Ladyada for Adafruit Industries.
11+
MIT license, all text above must be included in any redistribution
12+
****************************************************/
13+
14+
#include "Adafruit_ThinkInk.h"
15+
16+
#ifdef ARDUINO_ADAFRUIT_FEATHER_RP2040_THINKINK // detects if compiling for
17+
// Feather RP2040 ThinkInk
18+
#define EPD_DC PIN_EPD_DC // ThinkInk 24-pin connector DC
19+
#define EPD_CS PIN_EPD_CS // ThinkInk 24-pin connector CS
20+
#define EPD_BUSY PIN_EPD_BUSY // ThinkInk 24-pin connector Busy
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#define SRAM_CS -1 // use onboard RAM
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#define EPD_RESET PIN_EPD_RESET // ThinkInk 24-pin connector Reset
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#define EPD_SPI &SPI1 // secondary SPI for ThinkInk
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#else
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#define EPD_DC 10
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#define EPD_CS 9
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#define EPD_BUSY 7 // can set to -1 to not use a pin (will wait a fixed delay)
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#define SRAM_CS 6
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#define EPD_RESET 8 // can set to -1 and share with microcontroller Reset!
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#define EPD_SPI &SPI // primary SPI
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#endif
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// 3.7" Tricolor Display with 417x240 pixels and UC8253 chipset
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ThinkInk_370_Tricolor_BABMFGNR display(EPD_DC, EPD_RESET, EPD_CS, SRAM_CS,
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EPD_BUSY, EPD_SPI);
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void setup() {
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Serial.begin(115200);
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while (!Serial) {
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delay(10);
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}
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Serial.println("Adafruit EPD full update test in red/black/white");
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Serial.println("3.7 Tri-Color EPD with UC8253 chipset");
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display.begin(THINKINK_TRICOLOR);
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}
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void loop() {
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Serial.println("Banner demo");
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display.clearBuffer();
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display.setTextSize(3);
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display.setCursor((display.width() - 144) / 2, (display.height() - 24) / 2);
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display.setTextColor(EPD_BLACK);
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display.print("Tri");
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display.setTextColor(EPD_RED);
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display.print("Color");
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display.display();
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delay(15000);
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Serial.println("Color rectangle demo");
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display.clearBuffer();
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display.fillRect(display.width() / 3, 0, display.width() / 3,
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display.height(), EPD_BLACK);
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display.fillRect((display.width() * 2) / 3, 0, display.width() / 3,
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display.height(), EPD_RED);
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display.display();
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delay(15000);
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Serial.println("Text demo");
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// large block of text
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display.clearBuffer();
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display.setTextSize(1);
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testdrawtext(
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"Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur "
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"adipiscing ante sed nibh tincidunt feugiat. Maecenas enim massa, "
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"fringilla sed malesuada et, malesuada sit amet turpis. Sed porttitor "
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"neque ut ante pretium vitae malesuada nunc bibendum. Nullam aliquet "
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"ultrices massa eu hendrerit. Ut sed nisi lorem. In vestibulum purus a "
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"tortor imperdiet posuere. ",
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EPD_BLACK);
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display.display();
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delay(15000);
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display.clearBuffer();
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for (int16_t i = 0; i < display.width(); i += 4) {
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display.drawLine(0, 0, i, display.height() - 1, EPD_BLACK);
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}
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for (int16_t i = 0; i < display.height(); i += 4) {
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display.drawLine(display.width() - 1, 0, 0, i, EPD_RED);
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}
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display.display();
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delay(15000);
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}
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void testdrawtext(const char *text, uint16_t color) {
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display.setCursor(0, 0);
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display.setTextColor(color);
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display.setTextWrap(true);
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display.print(text);
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}

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