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Adafruit Trinkey QT2040 - RP2040 USB Key with Stemma QT

Adafruit Trinkey QT2040 - RP2040 USB Key with Stemma QT

We have ✅ 1 available of the AF-5056 in our Sydney warehouse. An extra 100 units available with a short lead time.

Express post delivery (2-5 business days)

The Adafruit Trinkey QT2040 is an RP2040-based microcontroller that plugs directly into any USB-A port on your computer or laptop. With a STEMMA QT / Qwiic connector on the end, it turns any I2C sensor or accessory into a plug-and-play USB device — no breadboard or soldering required.

The board features an RP2040 dual-core Cortex M0+ processor running at ~125 MHz, 264KB RAM, and 8MB of QSPI flash for storing CircuitPython code and files. An RGB NeoPixel, reset button, and bootloader/user button round out the compact design. The main body matches the size and mounting holes of most STEMMA QT boards (1.0" × 0.7"), so you can stack a sensor board directly on top.

Key Features

  • USB-A Plug-In Design – Extra-thick PCB slides directly into any USB-A host port
  • RP2040 Processor – Dual-core 32-bit Cortex M0+ running at ~125 MHz, 3.3V logic
  • 264KB RAM + 8MB Flash – Plenty of space for CircuitPython code, files, images, and fonts (~7MB usable with Python)
  • STEMMA QT / Qwiic Port – Solderless I2C connector compatible with SparkFun Qwiic and hundreds of sensors and accessories
  • Native USB – USB serial console, MIDI, keyboard/mouse HID, and USB mass storage
  • CircuitPython & MicroPython – Ships ready for CircuitPython; also supports MicroPython and C/C++ via the Pico SDK
  • Built-in RGB NeoPixel – Programmable status indicator
  • Reset + Boot/User Button – Quick restarts and bootloader entry; boot button also usable in user code
  • 3.3V Regulator – 600mA peak output
  • Stackable Form Factor – 1.0" × 0.7" with M2.5 mounting holes matching most STEMMA QT boards
Tip: To enter the UF2 bootloader, hold down the BOOT button while plugging into USB. The board will appear as a USB drive where you can drag and drop new firmware.

Ideal For

  • Plug-and-play USB sensor devices
  • Custom USB HID devices (keyboards, macros, MIDI controllers)
  • Quick I2C sensor prototyping without a breadboard
  • CircuitPython learning and experimentation
  • Compact USB dongles and tools

Package Contents

  • 1× Adafruit Trinkey QT2040 (with CircuitPython pre-loaded)

Resources

The Adafruit Trinkey QT2040 - RP2040 USB Key with Stemma QT appears in the following collections:

SKU AF-5056
by Adafruit