Arduino UNO R4, which has become available on the Arduino Store, is the fourth version of the iconic Arduino UNO. This fourth and enhanced iteration adds a whole new dimension to the world of DIY, with a speedy 32-bit Arm® Cortex®-M4, while also offering a 16-fold increase in memory, as well as more connectors and connectivity options than ever – in two variants: UNO R4 Minima and UNO R4 WiFi.

The UNO R4 WiFi variant is perfect for all users, from beginners to experts, wanting to explore the forefront of innovation. This full-fledged board features an ESP32-S3 coprocessor that handles Wi-Fi® and Bluetooth® Low Energy connectivity, so the other microcontroller, RA4M1, can focus on different tasks. On top of all the features in the Minima variant, UNO R4 WiFi offers:

• • Wi-Fi® and Bluetooth® connectivity, plus Cloud-compatibility: build IoT projects, create an interactive dashboard and control your project remotely.
  • A 12×8 LED matrix: imagine working on a creative project using animations or plotting sensor data, without any additional hardware!
  • A Qwiic connector to facilitate quick prototyping: thanks to a wide variety of compatible modules that can be connected over I2C, you can easily create custom projects and expand the capabilities of your UNO R4 WiFi.
  • A built-in mechanism that detects operations that might cause a crash: if it catches errors such as a division by zero, the board stops them before they can cause trouble, and provides a detailed explanation on the serial monitor.

You can learn more about UNO R4 and its two variants, UNO R4 Minima and UNO R4 WiFi, by visiting the respective webpages. If you need more ordering and shipping information on Espressif’s ESP32-S3, which is the coprocessor that handles Wi-Fi® and Bluetooth® Low Energy connectivity in the UNO R4 WiFi variant, you can contact our customer support team, who will try and assist you as soon as possible.