Arduino Uno R4 WiFi Clone
Arduino Uno R4 WiFi Clone
The Arduino Uno R4 WiFi Clone is a cost-effective compatible board based on the same architecture as the official Arduino Uno R4 WiFi, featuring the Renesas RA4M1 32-bit ARM Cortex-M4 microcontroller paired with an ESP32-S3 co-processor for built-in Wi-Fi and Bluetooth connectivity. It retains the classic Uno form factor and pin layout while delivering a significant performance and connectivity upgrade over the R3.
Key Features
- Renesas RA4M1 MCU — 32-bit ARM Cortex-M4 running at 48 MHz for powerful embedded processing
- ESP32-S3 Wi-Fi & Bluetooth — onboard 2.4 GHz Wi-Fi (802.11 b/g/n) and Bluetooth 5.0 via ESP32-S3 co-processor
- 12×8 LED Matrix — built-in LED matrix for displaying animations, patterns, and data visualizations
- USB-C Connector — modern USB-C port for programming and power
- CAN Bus Interface — onboard CAN bus transceiver for automotive and industrial applications
- DAC Output — 12-bit DAC for true analog audio and signal generation
- RTC (Real-Time Clock) — onboard RTC for time-keeping applications
- Uno R3 Pin Compatible — same shield and pin layout as Uno R3 for full shield compatibility
- Arduino IDE Compatible — programs via standard Arduino IDE with Renesas board package
Technical Specifications
- MCU: Renesas RA4M1 (ARM Cortex-M4, 48 MHz)
- Wi-Fi/BT Co-processor: ESP32-S3
- Operating Voltage: 5V
- Input Voltage: 6–24V (barrel jack) or USB-C
- Flash Memory: 256 KB | SRAM: 32 KB
- Digital I/O: 14 pins (6 PWM)
- Analog Inputs: 6 pins (14-bit ADC)
- DAC: 12-bit (1 channel)
- USB: USB-C (native HID support)
- Connectivity: Wi-Fi 802.11 b/g/n, Bluetooth 5.0
- Onboard LED Matrix: 12 × 8
Ideal For
Ideal for IoT projects, Wi-Fi-connected sensor nodes, home automation, real-time data dashboards, audio synthesis, CAN bus applications, and any project that benefits from the familiar Uno form factor with modern 32-bit performance and wireless connectivity.
Compatible with Arduino Uno R3 shields. Programs via Arduino IDE with Renesas RA4M1 board package. Clone board — not official Arduino branded.