Design with Adafruit 2.13in Monochrome E-Ink Bonnet in Cirkit DesignerThe Adafruit 2.13in Monochrome E-Ink Bonnet is a high-contrast, low-power display module designed for use with the Raspberry Pi. This E-Ink or electronic paper display (EPD) is ideal for applications where a simple, clear display is needed without the power consumption of a traditional LCD. Common applications include e-readers, signage, shelf labels, and any project where the display content changes infrequently.
This circuit interfaces an Arduino UNO with a 2.9" Greyscale eInk display, allowing the microcontroller to control the display and render images. The Arduino is programmed to initialize the display, draw a checkerboard pattern, and invert the pattern after a delay, demonstrating the eInk display's ability to hold images without continuous updates.
Open Project in Cirkit Designer
This circuit integrates an ESP32-S3 microcontroller with a 2.9" Tri-Color E-Ink display, enabling the microcontroller to control the display for rendering graphics and text. The ESP32-S3 communicates with the display using SPI protocol, allowing for dynamic visual output such as animations and text updates in red, black, and white.
Open Project in Cirkit Designer
This circuit is a battery-powered weather station using an ESP32-C3 microcontroller, an E-Ink display, and two climate sensors (AHT21 and BMP280). It measures temperature, humidity, and pressure, displaying the data on the E-Ink screen, with a pushbutton to toggle between metric and imperial units.
Open Project in Cirkit Designer
This circuit features a Raspberry Pi 4B interfaced with an IMX296 color global shutter camera, a Neo 6M GPS module, an Adafruit BMP388 barometric pressure sensor, an MPU-6050 accelerometer/gyroscope, and a Sim800l GSM module for cellular connectivity. Power management is handled by an MT3608 boost converter, which steps up the voltage from a Lipo battery, with a resettable fuse PTC and a 1N4007 diode for protection. The Adafruit Perma-Proto HAT is used for organizing connections and interfacing the sensors and modules with the Raspberry Pi via I2C and GPIO pins.
Open Project in Cirkit Designer| Pin Number | Name | Description |
|---|---|---|
| 1 | GND | Ground |
| 2 | 3V3 | 3.3V Power |
| 3 | SCK | SPI Clock |
| 4 | MOSI | SPI Master Out Slave In |
| 5 | CS | SPI Chip Select |
| 6 | DC | Data/Command control pin |
| 7 | RST | Reset pin |
| 8 | BUSY | Busy state output pin |
Hardware Setup:
Software Configuration:
sudo pip3 install adafruit-circuitpython-epd
sudo apt-get install python3-pil
raspi-config:
sudo raspi-config
Interfacing Options > SPI and enable it.Displaying Content:
import digitalio
import board
from PIL import Image, ImageDraw, ImageFont
import adafruit_epd.epd as epd
# Initialize the display
spi = board.SPI()
ecs = digitalio.DigitalInOut(board.CE0)
dc = digitalio.DigitalInOut(board.D22)
rst = digitalio.DigitalInOut(board.D27)
busy = digitalio.DigitalInOut(board.D17)
display = epd.EPD(spi, ecs, dc, rst, busy)
display.begin()
# Clear the display buffer
display.clear_buffer()
# Create a blank image for drawing
width = display.width
height = display.height
image = Image.new('1', (width, height), 255)
draw = ImageDraw.Draw(image)
# Draw some text
font = ImageFont.load_default()
draw.text((10, 10), 'Hello, E-Ink!', font=font, fill=0)
# Display the image
display.image(image)
display.display()
Display Not Updating:
Image Quality Issues:
SPI Communication Errors:
ls /dev/spi* to check if SPI devices are available.raspi-config.Display is Blank:
Q: Can the display show grayscale images? A: No, the display is monochrome and can only show black and white pixels.
Q: How do I update only part of the display? A: Use the partial update functions provided by the Adafruit CircuitPython EPD library.
Q: Is the E-Ink Bonnet compatible with all Raspberry Pi models? A: It is compatible with any Raspberry Pi model that has a 40-pin GPIO header.
Q: How long does the display content remain visible after power is removed? A: The E-Ink display will retain the last image shown indefinitely without power.
For further assistance, consult the Adafruit support forums or the CircuitPython EPD library documentation.