Arduino UNO R4 WiFi

Arduino UNO R4 WiFi Board

The Arduino UNO R4 WiFi offers versatility and a wealth of possibilities for makers of all levels. Indeed, this board combines the processing power of Renesas’ RA4M1 microcontroller with the wireless connectivity of Espressif’s ESP32-S3, allowing you to easily expand the configuration of your projects and the peripherals connected to it. Furthermore, this board features an integrated 12×8 LED matrix, a Qwiic connector (compatible with the Stemma QT connector, for connecting other sensors and devices) and VRTC and OFF pins; features that are highly valued in any project!

UNO R4 WiFi Features:

• Hardware compatibility with the UNO board format: The UNO R4 WiFi retains the same form factor, pinout and 5V operating voltage as its predecessor, the UNO R3, thus ensuring a seamless transition for HATs, shields and existing projects.
• Expanded memory and faster clock speed: the increased memory and higher clock speed facilitate precise calculations and the management of complex projects.
• Additional Integrated Peripherals: the introduction of various integrated peripherals, including a 12-bit DAC, CAN bus and OP AMP, makes projects expandable and flexible.
• Extended 24V Tolerance: the board supports a wide range of input voltages, so it can easily integrate with motors, LED strips and other actuators using a single power source.
• HID support: With built-in HID support, you can emulate a mouse or keyboard when the UNO R4 WiFi is connected to a computer via USB, making it easy to send keystrokes and mouse movements.
• Wi-Fi and Bluetooth: the ESP32-S3 module on the board allows makers to add wireless connectivity to their projects. When paired with the Arduino IoT Cloud, you can monitor and control your projects remotely.
• Qwiic/StemmaQT connector: The Qwiic I2C connector on the board allows you to easily connect compatible sensors and actuators that use both the Qwiic (Sparkfun) and Stemma (Adafruit)
• Battery-powered RTC support: there are additional pins: an ‘OFF’ pin to power down the board and a ‘VRTC’ pin to keep the internal real-time clock powered and running.
• LED Matrix: The bright red LED matrix (12×8 LEDs) is ideal for creative projects involving animations or plotting sensor data, eliminating the need for additional hardware.
• Runtime Error Diagnostics: The UNO R4 WiFi includes an error detection mechanism capable of identifying runtime crashes and providing detailed explanations and suggestions regarding the line of code that caused the crash.

UNO R4 WiFi Technical Specifications

• Renesas RA4M1 microcontroller (Arm® Cortex®-M4)
• USB-C programming port
• 14 x Digital I/O pins
• Pins:
  6 x analogue input pins
  1 x DAC
  6 x PWM
  1 x UART
  1 x I2C
  1 x SPI
  1 x CAN Bus
• Power supply:
  Circuit operating voltage: 5V (ESP32-S3 at 3.3 V)
  Input voltage (VIN): 6–24 V
  DC current on I/O pins: 8 mA
• Clock speed: Main core 48 MHz; ESP32-S3 up to 240 MHz
• Memory: RA4M1 256 kB Flash, 32 kB RAM; ESP32-S3 384 kB ROM, 512 kB SRAM
• Dimensions: 68.85 mm x 53.34 mm