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Hardware Overview

The Arduino UNO Q unlocks a new level of performance for the Arduino ecosystem, blending robust computing power from Qualcomm’s advanced QRB2210 Microprocessor (MPU) running a full Debian Linux OS with upstream support, and the real-time responsiveness of a dedicated STM32U585 Microcontroller (MCU) running Arduino sketches over Zephyr OS — all on a single-board computer.

Board Architecture Overview​

Arduino Q

  • Microprocessor: Qualcomm QRB2210 MPU
  • Microcontroller:TMicroelectronics STM32U585 (32-bit Arm Cortex-M33) MCU
  • Wireless Connectivity: WCBN3536A radio module, dual-band Wi-Fi 5 (2.4/5 GHz) and Bluetooth® 5.1 connectivity,
  • Memory: The board features 16 GB or 32 GB options of eMMC storage and 2 GB or 4 GB options of LPDDR4 RAM.
  • Multimedia Codec: The ANX7625 multimedia codec enables video and audio output through the onboard USB-C connector.
  • Power Management: The UNO Q includes the Qualcomm® PM4145.

Pinout​

First Use - Powering the Board​

The Arduino UNO Q can be powered by:

  • A USB-C® cable providing 5 VDC 3 A (not included).
  • An external +5 VDC power supply connected to 5V pin.
  • An external +7-24 VDC power supply connected to VIN pin.

Powering the Board

Power Button​

The UNO Q features a power button that can be used to reboot the board.

Power Button

Long press: the board’s Linux part is rebooted when the button is pressed for 5+ seconds.

note

You do not need to press the power button for the board to power up, it boots automatically after being powered.

MPU and MCU Communication​

Internal connection

Bridge - Remote Procedure Call (RPC) Library​

The Arduino UNO Q uses RPC (Remote Procedure Call) to exchange data between the Linux (Qualcomm MPU) side and the real-time STM32 MCU.

RPC

The Bridge library provides a communication layer built on top of the Arduino_RPClite framework. It manages bidirectional RPC traffic between the MPU and MCU, handling method binding, request forwarding, and asynchronous responses.

Wireless Connectivity​

Wirless Module

The UNO Q features the WCBN3536A radio module that provides dual-band Wi-Fi® 5 (2.4/5 GHz) and Bluetooth® 5.1 to the board.

Since the radio module is connected to the Qualcomm microprocessor, we need the Bridge to expose the connectivity to the microcontroller.