Arduino UNO R4 WiFi

Overview

The Arduino UNO R4 WiFi is a latest new upgrade to the popular Arduino UNO R3 board. UNO R4 has the same form factor as the UNO R3 measuring 68.58 x 53.34 mm in dimensions. UNO R4 WiFi comes with a Renesas RA4M1 (Arm® Cortex®-M4) a 32-bit microprocessor clocked at 48 MHz, expanded menory with 32kB of SRAM and 256kB of flash memory and supports 5V operating voltage and also hosts a ESP32-S3 module from Espressif which adds the functionality of wireless connectivity (WiFi and Bluetooth 5.0).

Apart from the improved performance and expanded memory, it has an onboard RTC (Real Time Clock), DAC (Digital to Analog Converter), 14-bit ADC (Analog to Digital Converter), OPAMP (Operational Amplifier) and a MPU (Memory Protection Unit). All these features eliminate the need for additional components in projects, simplifying the design process.

Also turn your UNO into a keyboard or mouse! The UNO R4 WiFi built-in HID support lets you control your computer directly with keystrokes and mouse movements when connected through USB. This opens up new possibilities for interactive projects and simplifies user input.

The UNO R4 WiFi user-friendly design makes it easy to learn for beginners, while its powerful features provide ample room for experienced users to explore more complex projects. Whether you're building a sophisticated robot with advanced motor control or developing a data logger that captures and analyzes intricate sensor readings, the UNO R4 has the power and memory to handle your project's needs.

Features

Microprocessor

• Renesas RA4M1 Arm® Cortex®-M4 microprocessor @ 48MHz with a floating point unit (FPU) @ 5V operating voltage
• Real-time Clock (RTC)
• Memory Protection Unit (MPU)
• Digital Analog Converter (DAC)

Memory

• 256 KB Flash
• 32 KB SRAM
• 8 KB EEPROM

Pins

• 14x Digital Pins (GPIO), D0 - D13
• 6x Analog Input Pins (ADC), A0 - A5
• 6x PWM Pins D3, D5, D6, D9, D10, D11

Peripherals

• Capacitive Touch Sensing Unit
• USB 2.0 Full Speed Module
• 14-bit ADC
• 12-bit DAC
• Operational Amplifier (OPAMP)

Power

• 6 to 24V Recommended Voltage
• 5V Operating Voltage
• Power via USB-C @ 5V
• Overvoltage and Reverse Polarity Portection with Schottky Diodes

WiFi

• Wi-Fi® support with 802.11 b/g/n standard (Wi-Fi® 4)
• Bit rate at up to 150 Mbps
• 2.4 GHz band

Bluetooth

• Bluetooth® 5

Specification

Board Layout

UNO R4 mechanical drawing and board layout.

Pinout

Pinout for Arduino UNO R4 WiFi

Power

Analog

Digital

ICSP (SPI) Header

Pinout and pin position for ICSP Header

OFF, VRTC Header