Skip to main content

What is DUELink?

Smart modules. Plain text commands.​

DUELink works with PCs, phones, tablets, and SBCs

DUELink is a family of smart electronic modules. Each module already knows its job — you control it by sending plain text commands like RelayOn(2).

Commands are sent over USB, I2C, or UART, from any host that can send text:

  • Hardware — PC, Raspberry Pi, Arduino, micro:bit, phone, or anything else
  • Language — Python, JavaScript, .NET, MicroPython, or any other

Supported languages — Python, JavaScript, C#, C++, MicroPython, Swift, Excel, and more

Add a display, a sensor, or a motor to whatever board you already have — no soldering, no driver hunt, no datasheet dive.

Arduino redboard hosting a DUELink color display

Many popular host boards even ship with the JST connector built in, so DUELink plugs straight in without an adapter.

Boards with compatible JST connectors

A real example: vehicle data logger​

Imagine a quick prototype that plugs into a vehicle and:

  1. Runs from the car battery.
  2. Captures CAN bus messages.
  3. Reads current GPS position.
  4. Logs everything to a USB memory stick.
  5. Shows live info on a color display.

Put the soldering iron aside and grab a Holey Board instead — pick the modules off the catalog, drop them in, and write a short script on your host. A project that used to take days takes an afternoon.

Vehicle data logger built on a DUELink Holey Board

Same story for industrial prototypes, lab fixtures, or one-off internal tools — graphics, file logging, sensors, motors, all driven from plain text commands in whatever language you already write.

Commercial product built with DUELink

Chain modules​

Connect more modules from one host using the Downlink port. One cable carries commands through any number of modules.

Daisylink

The same I2C bus works with other ecosystems too — SparkFun Qwiic, Adafruit STEMMA QT, and Arduino Modulino plug right in (Seeed Studio Grove works with an adapter cable). Mix DUELink and third-party modules in one project.

DUELink STEM I2C qwiic stemmaQT modulino

Code on the module itself​

Besides sending commands from a host, you can put your code on the module's on-board STM32 MCU — your code runs right on the module with no host needed.

CincoBit

For Educators

Boards like CincoBit, PixoBit, and Clipit work great as classroom singletons with MicroBlocks — block coding with a complete curriculum.

DueDuino

On-Module Code

Any DUELink board's MCU can be programmed directly with Arduino IDE or C++. Boards like DueDuino, Stick, and Stamp are especially handy for this.

Where to next?​

  • Get started — try a command in the browser, then send it from Python, JavaScript, .NET, Arduino, or MicroPython
  • Chain modules — one host, many modules (and works with Qwiic/STEMMA)
  • For educators — MicroBlocks + curriculum
  • Code on the module — Arduino IDE / C++ on the on-board MCU
  • Browse the catalog — sensors, displays, motors, kits, and more