• Hardware compatibility with UNO form factor: The UNO R4 compatible maintains the same form factor, pinout, and 5V operating voltage as the UNO R4. This ensures a seamless transition for existing shields and projects, leveraging the extensive and unique ecosystem that is already established for the Arduino UNO.
• Expanded memory and faster clock: Prepare for more precise calculations and the ability to handle complex projects with ease. The UNO R4 boasts increased memory and a faster clock speed, empowering you to tackle demanding tasks effortlessly.
• Extra onboard peripherals: The UNO R4 introduces a range of onboard peripherals, including a 12-bit DAC, CAN BUS, and OP AMP. These additional components provide you with expanded capabilities and flexibility in your designs.
• Extended 24V tolerance: The UNO R4 now supports a wider input voltage range, allowing power supplies up to 24V. This enables seamless integration with motors, LED strips, and other actuators, simplifying your projects by utilizing a single power source.
• SWD connector: Debugging is a critical aspect of any project. Simply connect an external debugger to the UNO R4 and effortlessly monitor the inner workings of your system. Stay in control and gain valuable insights.
• HID support: The UNO R4 compatible comes with built-in HID (Human Interface Device) support, enabling it to simulate a mouse or keyboard when connected to a computer via a USB cable. This convenient feature makes it a breeze to send keystrokes and mouse movements to a computer, enhancing usability and functionality.

Additional features of UNO R4 WiFi:

• 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.