Arduino UNO R4 WiFi combines the processing power of the Renesas RA4M1 microcontroller with the wireless connectivity of Espressif's ESP32-S3 and exciting new hardware extras. In addition, the UNO R4 WiFi provides an integrated 12x8 LED matrix, a QWIIC connector, a VRTC pin for backup battery use, and an OFF pin, covering all the possible needs hobbyists might have for their next project.

What UNO R4 WiFi offers

• Hardware compatibility with UNO form factor: The UNO R4 WiFi retains the same form factor, pinout, and 5 V voltage levels as its predecessor UNO R3. This ensures a smooth transition for existing projects and shields.
• More memory and higher clock speed: UNO R4 WiFi offers larger program memory and improved performance, allowing significantly more demanding tasks compared to its predecessor.
• Additional onboard features: UNO R4 WiFi brings several built-in peripherals, such as a 12-bit DAC analog output, CAN BUS vehicle network interface, and an OP AMP operational amplifier.
• Extended 24 V tolerance: UNO R4 WiFi now supports a wider input voltage, allowing the use of up to a 24 V power source. This makes projects easier where it is preferable to use a single common power supply.
• HID support: The UNO R4 WiFi development board has built-in HID (Human Interface Device) support. When connected to a computer via USB cable, the UNO R4 can act as a mouse or keyboard to provide simple commands.
• Wi‑Fi® and Bluetooth®: UNO R4 WiFi includes an ESP32-S3 module, enabling wireless connectivity in projects. Combined with the Arduino IoT Cloud, you can monitor and control projects remotely.
• QWIIC connector: The UNO R4 WiFi has a Qwiic I2C connector, which gives access to a wide range of expansion boards in the QWIIC ecosystem.
• Support for battery-backed RTC: UNO R4 WiFi includes additional pins, including an "OFF" pin to turn the board off and a "VRTC" pin to maintain the onboard Real-Time Clock.
• LED matrix: UNO R4 WiFi includes a bright 12x8 red LED matrix that can be used for creative animation projects or plotting sensor data.

Specifications

Links

• Arduino IoT Cloud Compatible
• Arduino Docs for UNO R4 WiFi
• Arduino Blog - UNO R4: The new dimension of making
• UNO R4 WiFi Schematics (pdf)
• UNO R4 WiFi Datasheet (pdf)

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