Adafruit 4947 2.13inch 250x122 Tri-Color eInk / ePaper Display with SRAM - SSD1680 Driver

The Adafruit 4947 is a 2.13-inch tri-color electronic paper display module featuring 250x122 pixel resolution with integrated SRAM and SSD1680 driver IC, designed for low-power IoT applications and embedded systems. Professional developers and hobbyists use this module to create battery-powered information displays, weather stations, inventory management systems, and smart shelf labels that require minimal power consumption and excellent visibility in ambient light. This product solves the critical challenge of displaying dynamic content on battery-powered devices without the power drain of traditional LCD or OLED screens, enabling weeks or months of operation on a single charge.

Product Overview

The Adafruit 4947 tri-color ePaper display utilizes electrophoretic display technology where electrically charged particles move within a thin microcapsule layer to create images. The display operates by applying voltage across the display matrix, causing red and black particles to move toward the viewer or away, depending on polarity. The SSD1680 driver IC manages the complex timing sequences and waveforms required for particle movement, while the integrated SRAM buffer stores the image data locally, reducing communication overhead with the host microcontroller. This architecture enables the display to maintain its image indefinitely without power consumption once the image is written, making it ideal for applications where power efficiency is paramount.

The 250x122 resolution provides sufficient pixel density for readable text and simple graphics across the 2.13-inch diagonal display area. The tri-color capability allows simultaneous display of black, white, and red elements, expanding visual communication possibilities beyond monochrome displays. The module communicates via SPI (Serial Peripheral Interface), a standard protocol supported by virtually all microcontrollers, making integration straightforward for developers familiar with embedded systems. The display features a flexible PCB connector for integration into compact designs and operates at 3.3V logic levels, compatible with modern microcontroller platforms including Arduino, Raspberry Pi, and STM32 boards.

Key Specifications

Specification	Details
Product Type	Tri-Color eInk / ePaper Display Module
Brand	Adafruit Industries
Origin	Original / Authentic
Warranty	7 days on manufacturing defects
Shipping	1-5 days from Bengaluru
Delivery	7-8 days across India
Support	24/7 via Email and WhatsApp
Display Size	2.13 inches diagonal
Resolution	250 x 122 pixels
Color Support	Tri-Color: Black, White, Red
Driver IC	SSD1680
Communication Interface	SPI (Serial Peripheral Interface)
Operating Voltage	3.3V logic, 15V display driving voltage
Power Consumption	Minimal in standby, peak during refresh cycles
Refresh Time	Approximately 2-3 seconds for full refresh
Memory	Integrated SRAM buffer for image storage

Key Features

• Tri-Color Display Capability: Simultaneous display of black, white, and red pixels enabling richer visual communication compared to monochrome alternatives, ideal for status indicators, alerts, and branded content
• Ultra-Low Power Consumption: Electrophoretic technology maintains displayed image indefinitely without power draw, enabling battery-powered devices to operate for months on a single charge
• Integrated SRAM Buffer: On-board memory stores image data locally, reducing microcontroller memory requirements and SPI communication overhead during display updates
• SSD1680 Driver Integration: Professional-grade driver IC handles complex voltage waveform generation and timing sequences, simplifying integration and ensuring reliable display operation
• SPI Communication: Industry-standard Serial Peripheral Interface enables straightforward integration with Arduino, Raspberry Pi, STM32, and other microcontroller platforms
• Flexible PCB Connector: Compact form factor with flexible connector allows integration into space-constrained designs and wearable applications
• Wide Viewing Angles: Electrophoretic technology provides excellent visibility from multiple angles without image degradation, superior to LCD displays
• Ambient Light Independence: Display remains clearly visible in bright sunlight without backlight power consumption, perfect for outdoor applications

Applications and Use Cases

• Smart Shelf Labels: Retail environments utilize these displays for dynamic pricing and product information updates in supermarkets and warehouses, reducing paper waste and enabling real-time price synchronization across multiple locations
• IoT Weather Stations: Battery-powered weather display modules show temperature, humidity, and atmospheric pressure with multi-week battery life, ideal for remote monitoring stations and outdoor installations
• Inventory Management Systems: Warehouse management applications display stock levels and location information on mobile carts and fixed stations, with SPI integration enabling wireless data synchronization
• Wearable Devices: Smartwatch and fitness tracker applications leverage the ultra-low power consumption to extend battery life while displaying health metrics, time, and notifications
• Public Transportation Displays: Bus and train information systems use tri-color displays for route numbers, arrival times, and status messages with excellent sunlight readability
• Medical Device Displays: Patient monitoring equipment and portable diagnostic devices utilize the display for vital signs and measurement results with minimal power impact on battery life
• Home Automation Dashboards: Wall-mounted energy monitoring and smart home control panels display real-time data with weeks of operation between charging cycles
• Industrial Equipment Labels: Manufacturing and logistics applications use these displays for dynamic equipment status, QR codes, and operational parameters in harsh environments

How to Use

To integrate the Adafruit 4947 display with your microcontroller project, first establish SPI communication by connecting the display's clock (CLK), data input (MOSI), chip select (CS), and data/command (DC) pins to corresponding SPI pins on your microcontroller. Additionally, connect the reset (RST) pin to a GPIO pin for hardware reset capability. Power the module with 3.3V and ground connections. Download the Adafruit GFX and EPD display libraries from the official GitHub repository and install them in your Arduino IDE or development environment. Initialize the display object with the appropriate pin assignments and SSD1680 driver parameters, then use the library functions to draw text, shapes, and images to the display buffer before calling the display refresh function to update the physical display.

When designing your application, remember that the display refresh cycle consumes temporary power and takes 2-3 seconds to complete, so batch multiple updates together rather than refreshing after each change. Utilize the integrated SRAM buffer to store image data locally, reducing the frequency of SPI transfers from your microcontroller. For battery-powered applications, implement sleep modes on both the microcontroller and display to minimize power consumption between updates. The tri-color capability allows you to use red pixels strategically for warnings or critical information, while black pixels convey standard data. Test your display refresh patterns during development to optimize the update frequency for your specific application requirements, balancing visual responsiveness against power consumption.

Frequently Asked Questions

What is the difference between eInk and ePaper display technology?

eInk and ePaper are essentially equivalent terms describing electrophoretic display technology. The terms are used interchangeably in the industry. Both refer to displays using charged particles suspended in microcapsules that move in response to electrical fields. The Adafruit 4947 uses this technology, providing permanent image retention without power consumption once the image is written, distinguishing it from LCD or OLED displays that require continuous power to maintain an image.

Can I update the display frequently or will it reduce the lifespan?

The Adafruit 4947 can tolerate thousands of refresh cycles without degradation, making frequent updates technically feasible. However, each refresh cycle consumes power, which impacts battery life in portable applications. For optimal battery longevity, limit display updates to necessary changes rather than refreshing continuously. Most applications update the display every few seconds to minutes, providing a good balance between visual responsiveness and power efficiency. The display itself will not degrade from normal usage patterns.

Is this display compatible with Raspberry Pi and Arduino platforms?

Yes, the Adafruit 4947 is fully compatible with both Arduino and Raspberry Pi platforms through SPI communication. Adafruit provides official libraries and example code for both platforms. Arduino users can install the libraries through the Arduino IDE library manager, while Raspberry Pi users can install Python libraries via pip. The 3.3V logic levels are compatible with both platforms, and the SPI pins are available on standard GPIO headers. Adafruit's documentation includes specific pinout diagrams for popular development boards.

What is the actual power consumption during standby and refresh?

During standby with a static image displayed, the Adafruit 4947 consumes virtually no power from the display itself, though the microcontroller still requires power. During refresh cycles, the display consumes temporary peak power to drive the electrophoretic particles, typically in the milliwatt range for a few seconds. The exact consumption depends on the refresh waveform and the amount of pixel change. For battery-powered applications, the microcontroller's sleep mode power consumption typically dominates the overall system power budget, not the display itself.

Can the display show grayscale or only solid colors?

The Adafruit 4947 is a tri-color display limited to black, white, and red pixels. It cannot display grayscale or color gradients. Each pixel is either fully black, fully white, or fully red. This limitation is inherent to the electrophoretic technology used. If your application requires grayscale or full-color capability, consider alternative display technologies such as LCD or OLED, though these will consume significantly more power in battery-powered applications.

When will I receive my order?

Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.

What is your return and warranty policy?

We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.

Are bulk discounts available?

Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.

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