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UNO R4 WiFi Development Module
UNO R4 WiFi Development Module
The UNO R4 WiFi Development Module is an advanced development board that combines the classic Arduino UNO form factor with a powerful 32-bit Renesas RA4M1 microcontroller, ESP32-S3-based wireless communication, a programmable LED matrix, and G-V-S pin groups that facilitate direct sensor and servo connections.
The board's main processor, the Renesas RA4M1, features a 32-bit Arm Cortex-M4 core running at 48 MHz. With 256 KB of Flash, 32 KB of SRAM, and 8 KB of Data Flash, it offers superior processing power and memory capacity compared to the classic ATmega328P-based UNO R3. It also includes advanced peripherals such as a hardware FPU, RTC, 14-bit ADC, 12-bit DAC, operational amplifier, and CAN controller.
For wireless communication, the board features an ESP32-S3-MINI-1 module. The ESP32-S3 supports 2.4 GHz WiFi 4 connectivity as well as Bluetooth 5 Low Energy. This enables the implementation of IoT, wireless sensor, remote control, and networked electronic projects without the need for an additional WiFi module.
The ESP32-S3 acts as a second microcontroller, operating independently of the main RA4M1 processor.Specifications
- Main Microcontroller: Renesas R7FA4M1AB3CFM / RA4M1
- Processor Architecture: 32-bit Arm Cortex-M4
- Main Processor Frequency: 48MHz
- FPU: Hardware Floating Point Unit
- RA4M1 Flash Memory: 256KB
- RA4M1 SRAM: 32KB
- Data Flash / EEPROM: 8KB
- Wireless Processor: ESP32-S3-MINI-1
- ESP32-S3 Processor: Dual-Core Xtensa LX7
- ESP32-S3 Maximum Frequency: 240MHz
- ESP32-S3 SRAM: 512KB
- ESP32-S3 ROM: 384KB
- WiFi Standard: IEEE 802.11 b/g/n / WiFi 4
- WiFi Frequency: 2.4GHz
- Bluetooth: Bluetooth 5 Low Energy
- Main Board Operating Voltage: 5V
- ESP32-S3 Operating Voltage: 3.3V
- External Input Voltage: 6–24V DC
- USB Connector: USB Type-C
