1.38″ DIABLO16 Round Display Module Pack for the Raspberry Pi A, B and B+
This 4D Systems Display Module Pack for the Arduino (and variants) is made up of a uLCD-220RD 1.38″ Round TFT LCD Display Module and a 4D Serial Pi Adaptor and 5 way interface cable, for quick and easy connection to a Raspberry Pi.
This Display Module Pack enables an Arduino user to quickly connect the 4D Serial Pi Adaptor to their Raspberry Pi, connect the 5 way cable between the Adaptor and the Display Module, and be connected in seconds to start programming their new 4D Systems Display.
The uLCD-220RD can be configured in a number of ways using the 4D Systems Workshop4 IDE. There are 4 programming Environments to choose from, to enable the widest range of options possible and to suit a wide range of Users and projects alike.
The uLCD-220RD-PI has a comprehensive ViSi-Genie library written to communicate with the Raspberry Pi, allowing the Visi-Genie events to be easily understood by the Raspberry Pi and users code.
Utilises the Raspberry Pi’s UART Serial Port.
For a detailed listing of the capabilities of the display module in this Raspberry Pi Pack, please refer to the datasheet for the display itself, available from the Product Page of the uLCD-220RD.
** NOT RECOMENDED FOR NEW DESIGNS **
Information about this Display Module
- Powerful 1.38″ Intelligent LCD-TFT display module powered by DIABLO16
- 220 x 220 Resolution (Round), RGB 65K true to life colours with LED Backlight.
- Easy 5 pin interface to any TTL Serial Host:
- VCC, TX, RX, GND, RESET
- 6 banks of 32750 bytes of Flash memory for User Application Code and Data
- 32Kb of SRAM purely for the User
- 16 General Purpose I/O pins for user interfacing, which include 4 configurable Analog Inputs
- The GPIO is variously configurable for alternative functions such as:
- 3x I2C channels available
- 1x SPI dedicated for SD Card and 3x configurable SPI channels available
- 1x dedicated and 3x configurable TTL Serial comm ports available
- Up to 6 GPIO can be used as Pin Counters
- Up to 6 GPIO for PWM (simple and Servo)
- Up to 10 GPIO for Pulse Output
- Up to 14 GPIO can be configured for Quadrature Encoder Inputs (2 channels)
- On-board micro-SD memory card connector for multimedia storage and data logging purposes
- DOS compatible file access (FAT16 format) as well as low level access to card memory
- Dedicated filtered PWM Audio pin driven by WAV files from micro-SD card, and external amplifier enable pin allows easy connection to an external amplifier for audio playback
- Display full colour images, animations, icons and video clips on chosen 4D Systems display
- Supports all available Windows fonts
- 4.0V to 5.5V range operation (single supply)
- Module dimensions: 42.4 x 46.9 x 14.1mm
- Weight ~15 g
- Display Viewing Area: Round 35.1mm Diameter
- RoHS Compliant
- CE Compliant
The uLCD-220RD-PI includes the following items:
- uLCD-220RD Display Module
- 4D Serial Pi Adaptor Shield
- 5 way ribbon cable
- Getting Started Manual Available as a Download
If you are a first time user and just beginning your development, we strongly recommend purchasing a Starter Kit of this same model as it includes additional items that allow you to get started with your development immediately.
Starter Kit part number is SK-220RD-PI .
SPECIFICATIONS
Display Size | 1.38" (Round) |
---|---|
Diagonal Display Size INCHES | 1.38 |
Resolution | 220×220 |
Brightness | ~171 cd/m2 |
Touch | Non-Touch |
Controller | DIABLO16 |
Operating Ambient Temperature | -20°C to +70°C |
Storage Temperature | -30°C to +80°C |
Connector | 5 pin Interface |
Display Viewing Area (mm) | 35.1 Diameter |
Module Dimensions (mm) | 42.40 x 46.90 x 14.10 |
RoHS? | Yes |
Country of origin | Australia |
CCCN / tarif code | 85312000 |
ECCN export control code | EAR99 |
TARIC Code | 8531209590 |
AHECC Code | 85312000 |
Package Dimensions L x W x H (mm) | 107 x 76 x 36 |
Product Weight (g) | 73 |
Weight with Packaging (g) | 110 |
REACH | Yes |
CE Mark | Yes |
Supply Voltage | 4.0V-5.5V DC |
Supply Current | ~150mA |
Frame Rate | 21.3 fps |
colours | RGB 65K |
Processor Capability | 1220K Pixels / second |
SD Card Slot | Yes – RAW or FAT16 Support. SPI Compatible microSD Cards Only |
Flash | 6 banks of 32KB |
RAM | 32KB SRAM |
I2C | 3 x Channels |
GPIO | 16 x GPIO |
SPI | 3 channels available |
Codeless Programming | Yes |
IDE | 4D Workshop4 IDE |
Serial Speed | 300 to 2187500 baud |
Serial Interfaces | 1 x dedicated and 3 x configurable |
8-bit Parallel Transfer | Yes |
Viewing Angle | Standard Viewing Angle |

SIZE & WEIGHT
Viewing Area: 35.1 Diameter
Module Width: 42.40 mm
Module Height: 46.90 mm
Module Depth:14.10 mm
Module Weight: 73 g

WORKSHOP4 IDE
Workshop4 is a comprehensive software IDE for Microsoft Windows that provides an integrated software development platform for all of the 4D family of processors and modules. The IDE combines the Editor, Compiler, Linker and Downloader to develop complete 4DGL application code.
All user application code is developed within the Workshop4 IDE.
DEVELOPMENT ENVIRONMENTS THAT SUITS ANY APPLICATION & USER LEVEL
Workshop4 includes four development environments for the user to choose based on application requirements or even user skill level.


WORKSHOP4 PRO
Make complex widget design, simple.
Smart Widgets Editor is a powerful utility which enables the generation of Smart Widgets.
GENIE MAGIC
Genie Magic is an extension to ViSi-Genie, which is available in Workshop4 PRO. Genie Magic allows the User to add 4DGL code to various points in the ViSi-Genie backend code, which allows Users to take full advantage of the power of 4DGL, while retaining the speed and convenience of ViSi-Genie and its defined communication protocol.
Genie Magic allows you to enter 4DGL code in the form of Events, Code and Objects, along with various touch related additions too, giving you to the power to achieve advanced GUI’s in ViSi-Genie without having to write the full code yourself.
Genie Magic is fully supported by the genieArduino and geniePi libraries, making communication with an Arduino or Raspberry Pi host even more powerful.
When using Genie Magic in combination with the Smart Widget Editor, it is possible to use the Smart Widgets Editor tool and Smart Widgets to create other graphical user interface elements such as:

DOWNLOADS
Compatibility:
Workshop4 is a Windows-only product. It is compatible with Windows 8 through to Windows 11.
Note some older OS such as ME, Vista, XP and 7 have not been tested for some time and are not supported by Microsoft anymore; however, they may still work.
Legacy support updates for the older OS may not be possible, depending on what issues are found. For best results, run a current Windows OS.
It is possible to run Workshop4 under a VM on Linux or Mac. However, it is up to the User to set this up.
Documentation
DIABLO Processor Documentation
Raspberry Pi Libraries
Order Now
- Raspberry Pi Display Module Pack, including the uLCD-220RD 1.38″ Display Module, a 4D Serial PI Adaptor and 5-way interface cable.
- The uLCD-220RD-PI customises the uLCD-220RD Display specifically for quick, easy and hassle-free interfacing with the Raspberry Pi.
- Suitable for fast and easy integration of a full-colour dedicated HMI into any application or product being developed with the Raspberry Pi.
- Includes 4D Serial Pi Adaptor for easy hardware interface to a Raspberry Pi.
- Starter Kits available for first-time users.
- See the product description below for more details.
THIS PRODUCT IS DISCONTINUED – ONLY REST STOCK AVAILABLE
We are delighted to offer volume discounts to qualified customers and organisations.
Starter Kits and Accessories
Related Products
RESOURCES
RFQ - VOLUME ORDERS
RFQ - VOLUME ORDERS
We are delighted to offer volume discounts to qualified customers and organizations.
Our dedicated Volume Sales team will address your specific requirements and help you get an accurate quotation in a timely manner.