You searched for Arduino UNO - CNX Software

April 27, 2026April 27, 2026

KernelUNO – A lightweight OS for Arduino UNO with a Linux-like shell

KernelUNO is an Arduino sketch with 546 lines of code that provides a lightweight OS for the Arduino UNO with a Linux-like shell offering commands such as ls, df, uname, and so on. All you need is an Arduino UNO R3 or a compatible board with a Microchip ATmega328P microcontroller, a USB cable for programming, and optionally a few LEDs and resistors for testing the gpio command in the terminal. KernelUNO offers the following features: Virtual Filesystem – Create files and directories in RAM (/dev, /home) Hardware Control – GPIO management with pin mode configuration System Monitoring – Memory usage, uptime, kernel messages (dmesg) Interactive Shell – Real-time command execution with input buffering 23 built-in commands File system commands – ls, cd, pwd, mkdir, touch, cat, echo [text] > [file], rm, info [name] Hardware commands pinmode [pin] [in/out] – Set pin mode write [pin] [high/low] – Write to pin read […]

January 21, 2026

Arduino UNO Q 4GB board with 4GB RAM, 32GB storage is now available for $59

When the Arduino UNO Q was first unveiled in October 2025, the specifications of the Qualcomm DragonWing SBC listed the ABX00162 SKU with 2GB RAM and 16GB eMMC flash, and the ABX00173 SKU with 4GB RAM and 32GB eMMC flash. So far, only the 2GB variant was available, and Arduino has now announced the availability of the Arduino UNO Q 4GB with 4GB of RAM and 32GB eMMC storage for more complex projects. Arduino UNO Q 4GB (ABX00173) specifications: Application SoC/MPU – Qualcomm QRB2210 CPU – Quad-core Cortex-A53 processor at up to 2.0 GHz GPU – Adreno 702 GPU at 845 MHz with support for OpenGL ES 3.1, Vulkan 1.1, OpenCL 2.0 DSP – Hexagon QDSP6 v66 VPU – 1080p 30 fps encode / 1080p 30fps decode ISP – 2x Image Signal Processor (13 MP + 13 MP or 25 MP) @ 30 fps Real-time MCU – STMicro STM32U585 Arm Cortex-M33 microcontroller […]

Qualcomm acquires Arduino, introduces Arduino UNO Q “dual-brain” SBC

Qualcomm has just signed an agreement to acquire Arduino, and the goal of the purchase is to “combine Qualcomm’s leading-edge products and technologies with Arduino’s vast ecosystem and community to empower businesses, students, entrepreneurs, tech professionals, educators, and enthusiasts to quickly and easily bring ideas to life.” They also took the opportunity to launch the Arduino UNO Q “dual-brain” SBC powered by a Qualcomm DragonWing QRB2210 SoC running Linux and an STMicro STM32U585 MCU for real-time control, as well as the Arduino App Lab integrated development environment to “unify the Arduino journey across Real‑time OS, Linux, Python, and AI flows”. Will the acquisition change anything? I suppose we’ll see more and more Arduino boards based on Qualcomm processors, but the company also promises to preserve Arduino’s open approach and community: Arduino will retain its independent brand, tools, and mission, while continuing to support a wide range of microcontrollers and microprocessors […]

Nuvoton NuMaker UNO M4 Cortex M4 industrial dev board

July 14, 2025July 14, 2025

Industrial IoT board based on NuMicro M467 Ethernet MCU follows Arduino UNO R4 form factor

The NuMaker-UNO-M4 is an industrial-grade IoT development board powered by a Nuvoton NuMicro M467 series Arm Cortex-M4F Ethernet MCU and following the Arduino UNO R4 form factor. The board also comes with Ethernet, RS485, CAN FD, and a microSD card slot for data logging. Power options include 5V via USB Type-C, 5–5.5V through a DC jack, and external 3.3V/5V through headers. It also features Arduino-compatible headers, push buttons, status LEDs, and a dedicated high-speed USB for power and programming. Nuvoton NuMaker-UNO-M4 Specifications SoC –Nuvoton NuMicro M467SJHAN CPU – Arm Cortex-M4 @ up to 192 MHz, with FPU and DSP Memory – Up to 512 KB SRAM with 64 KB parity check Storage Up to 1024 KB Flash with dual-bank, FOTA, and XOM support 8 KB LDROM, 3 KB OTP ROM Storage – MicroSD card slot Connectivity – 4-pin 10/100 Mbps Ethernet connector via RealTek RTL8201FI PHY USB – USB Type-C port […]

June 9, 2025June 9, 2025

Arduino UNO SPE Shield adds Single Pair Ethernet and RS485 to Arduino boards

Arduino UNO SPE Shield adds Single Pair Ethernet (SPE) and RS485 to Arduino UNO and compatible boards, notably the Arduino UNO R4, via a Microchip LAN8651 SPE controller. Single Pair Ethernet relies on just two wires to carry data and power, allowing for much more compact designs and simpler wiring compared to traditional RJ45-based solutions with Cat 5 cables. It especially benefits IoT and IIoT applications for buildings, factories, and process automation. Arduino UNO SPE specifications: Networking – Single Pair Ethernet (SPE) via Microchip LAN8651B1 10BASE-T1S MAC-PHY Ethernet Controller with SPI Data rate: 10 Mbit/s over a single balanced pair T1SP and T1SN available on screw terminal block Dedicated T1S SPE connector Maximum Distance – Supports up to 25 meters in multidrop topology (multiple nodes on a single segment) Up to eight nodes in a multidrop network Serial – RS485 via MaxLinear XR33058 Half duplex RS485 Data rate: 20 Mbit/s […]

March 24, 2025

SparkFun IoT RedBoard – Raspberry Pi RP2350 or ESP32 WiFi & Bluetooth boards with Arduino UNO R4 form factor

SparkFun has just launched the “IoT RedBoard – RP2350” and “IoT RedBoard – ESP32” boards with Arduino UNO R4 form factor based on respectively Raspberry Pi RP2350B + RM2 wireless module and ESP32-WROOM-32E WiFi and Bluetooth module. Both boards feature Arduino UNO headers and a Qwiic connector for expansion, a microSD card for storage, battery support, USB and DC jack power input, plus a few buttons and LEDs. The RP2350 board also adds an HSTX connector mainly useful for controlling HDMI or SPI displays. Sparkfun IoT RedBoard specifications: MCU sub-system and wireless RP2350 model MCU – Raspberry Pi RP2350B CPU Dual-core Arm Cortex-M33 @ 150 MHz with Arm Trust zone, Secure boot Dual-core RISC-V Hazard3 @ 150 MHz Up to two cores can be used at any given time Memory – 520 KB on-chip SRAM Memory – 8MB PSRAM Storage – 16MB Flash Wireless module – Raspberry Pi RM2 2.4 […]

March 10, 2025March 9, 2025

Adafruit Metro RP2350 development board follows Arduino UNO form factor, features HSTX DVI output

The Adafruit Metro RP2350 is a Raspberry Pi RP2350 development board that closely follows the Arduino UNO form factor for compatibility with existing Arduino shields. Key features include 37 GPIOs, a microSD card slot, a 5V buck converter (6–17V input), an onboard RGB NeoPixel, a Stemma QT port for I2C peripherals, a 22-pin HSTX port for DVI video output, and a USB Type-C port for power and data. It also provides a Pico Probe debug port, an RX/TX switch for UART flexibility, and a UF2 bootloader for easy firmware updates. Target applications include IoT projects, embedded system development, hardware prototyping, and educational purposes. Adafruit Metro RP2350 specifications SoC – Raspberry Pi RP2350 CPU Dual-core Arm Cortex-M33 @ 150 MHz with Arm Trust zone, Secure boot Dual-core RISC-V Hazard3 @ 150 MHz Up to two cores can be used at any given time Memory – 520 KB on-chip SRAM Security 8KB of […]

September 3, 2024September 2, 2024

WeAct RA4M1 – A small board with plenty of GPIOs that’s software-compatible with the Arduino UNO R4

Last week, we covered the Maker Go RA4M1-R4 development board, an inexpensive “clone” of the Arduino UNO R4 Minima with some small modifications like support for up to 50V DC input and a 3.3V/5V switch for I/Os. But today, I’ve come across a smaller and cheaper Renesas RA4M1 board that’s also software compatible with the Arduino UNO R4. Meet the WeAct RA4M1. The WeAct RA4M1 is mostly a breakout board for the Renesas R7FA4M1AB3CFM Arm Cortex-M4F microcontroller with two 30-pin GPIO headers, a USB-C port for power and programming, and three buttons. It offers a middle ground between the Arduino UNO R4 Minima and the tiny XIAO RA4M1 USB-C board. WeAct RA4M1 specifications: Microcontroller – Renesas RA4M1 Arm Cortex-M4F MCU @ 48 MHz with 32KB SRAM, 256KB flash USB – 1x USB Type-C port for power and programming Expansion 2x 30-pin headers with GPIO, VIN, VCC, GND 3.3V or 5V […]