1 The Board
1.1 Application Examples
The UNO R4 WiFi is part of the first UNO series of 32-bit development boards, being previously based on 8-bit AVR
microcontrollers. There are thousands of guides, tutorials and books written about the UNO board, where the UNO
R4 WiFi continues its legacy.
The board features 14 digital I/O ports, 6 analog channels, dedicated pins for I2C, SPI and UART connections. It has
a significantly larger memory: 8 times more flash memory (256 kB) and 16 times more SRAM (32 kB). With a 48 MHz
clock speed, it is also 3x faster than its predecessors.
In addition, it features an ESP32-S3 module for Wi-Fi® & Bluetooth® connectivity, as well as a built-in 12x8 LED
matrix, making one of the most visually unique Arduino board to date. The LED matrix is fully programmable,
where you can load anything from still frames to custom animations.
Entry-level projects: If this is your first project within coding and electronics, the UNO R4 WiFi is a good fit. It is
easy to get started with, and it has a lot of online documentation.
Easy IoT applications: build projects without writing any networking code in the Arduino IoT Cloud. Monitor your
board, connect it with other boards and services, and develop cool IoT projects.
LED Matrix: the 12x8 LED matrix on the board can be used for showing animations, text scrolling, create mini-
games and much more, being the perfect feature to give your project more personality.
1.2 Related Products
UNO R3
UNO R3 SMD
UNO R4 Minima