Introduction
Expected delivery: August
The new Arduino UNO R4 development board comes in two versions: the UNO R4 WiFi and the UNO R4 Minima. It runs on the Renesas RA4M1 (Arm Cortex®-M4) processor with a clock speed of 48MHz, which provides a 3x increase over the UNO R3. In addition to that, the SRAM has been upgraded from 2kB to 32kB and the flash memory has been increased from 32kB to 256kB to accommodate to more complex projects. Furthermore, in response to requests from the Arduino community, the USB port has been upgraded to USB-C and the maximum power supply voltage has been increased to 24V. The board provides a CAN bus, allowing users to minimize wiring and perform different tasks by connecting multiple extension boards. Finally, the new board also includes a 12-bit analog DAC.
The WiFi version comes with an Espressif S3 WiFi module, expanding creative opportunities for makers, educators, and hobbyists alike.
Based on the success of UNO R3, the UNO R4 board is the ideal prototype and learning tool for anyone. While retaining the well-known features of the UNO series, such as standard form factor, shield compatibility, 5V voltage, and robustness, new features have been added.
Thanks to its powerful design and reliable performance, the UNO R4 is a valuable addition to the Arduino ecosystem, suitable for beginners and experienced electronics enthusiasts alike to deploy their own projects.
Figure: Board Overview
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Product
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Uno R4
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Uno R3
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CPU
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Renesas RA4M1 (48 MHz, Arm Cortex M4)
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ATmega328P (16 MHz, AVR)
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SRAM
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32K
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2K
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Flash Storage
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256K
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32K
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USB
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Type-C
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Type-B
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Max Voltage
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24V
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20V
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Features
Hardware compatibility with UNO form factor
The UNO R4 WiFi maintains the
same form factor, pinout, and 5 V operating voltage as its predecessor, the UNO R3,
ensuring a seamless transition for existing shields and projects.
Expanded memory and faster clock
The UNO R4 WiFi boasts increased memory
and a faster clock speed, enabling more precise calculations and effortless handling
of complex projects.
Extra on-board peripherals
The UNO R4 WiFi introduces a range of on-board
peripherals, including a 12-bit DAC, CAN BUS, and OP AMP, providing expanded
capabilities and design flexibility.
Extended 24 V tolerance
The UNO R4 WiFi supports a wider input voltage range,
allowing seamless integration with motors, LED strips, and other actuators using a
single power source.
HID support
With built-in HID support, the UNO R4 WiFi can simulate a mouse or
keyboard when connected to a computer via USB, making it easy to send keystrokes
and mouse movements.
Wi-Fi® and Bluetooth®
The UNO R4 WiFi hosts an ESP32-S3 module, enabling
makers to add wireless connectivity to their projects. Combined with the Arduino
IoT Cloud, makers can monitor and control their projects remotely.
QWIIC connector
The UNO R4 WiFi features a Qwiic I2C connector, allowing easy
connection to nodes from the extensive QWIIC ecosystem. Adapter cables also
enable compatibility with sensors and actuators based on other connectors.
Support for battery-powered RTC
The UNO R4 WiFi includes additional pins,
including an "OFF" pin to turn off the board and a "VRTC" pin to keep the internal
Real-Time Clock powered and running.
LED matrix
The UNO R4 WiFi incorporates a bright 12x8 red LED matrix, ideal for
creative projects with animations or plotting sensor data, eliminating the need for
additional hardware.
Diagnostics for runtime errors
The UNO R4 WiFi includes an error-catching
mechanism that detects runtime crashes and provides detailed explanations and
hints about the code line causing the crash.
Specification
MCU:Arm cortex M4
Memory:256KB Flash/32KB SRAM
Operating voltage:5V
Input voltage:6-24V
Clock speed:48MHz
Programming port:USB-C
WiFi/BLE:ESP32-S3-MINI
LED Matrix:12x8(96 red LEDs)
Additional connections
Qwiic connector
OFF pin
VRTC pin
Digital pins:14
PWM:6
ADC:6
DAC:1(12bit)
SPI:1
I2C:2
CAN:1
Documents
Shipping List
Arduino UNO R4 WiFi Development Board × 1
