Product reference manual for the Arduino UNO R4 WiFi development board featuring a 32-bit RA4M1 microcontroller and ESP32-S3 Wi-Fi module.
The Arduino UNO R4 WiFi is the first board in the UNO series to feature a 32-bit microcontroller and an ESP32-S3 Wi-Fi module. It is designed for maker, beginner, and education applications, offering significantly larger memory and faster processing speeds compared to previous UNO models. The board includes a programmable 12x8 LED matrix for visual output and supports IoT applications via the Arduino IoT Cloud.
| Microcontroller | RA4M1 series (R7FA4M1AB3CFM#AA0) |
|---|---|
| Processor | 48 MHz Arm Cortex-M4 |
| SRAM | 32 kB |
| EEPROM | 8 kB |
| Wi-Fi Standard | 802.11 b/g/n |
| Bluetooth Version | Bluetooth 5 |
| Operating Temperature | -40 to 85 °C |
| Input Voltage (VIN) | 6-24 V |
The board features a 32-bit RA4M1 series microcontroller from Renesas based on a 48 MHz Arm Cortex-M4 microprocessor.
You can enter bootloader mode by double-tapping the reset button right after the power-up.