Arduino UNO R4 WiFi is A powerful microcontroller development board with built-in WiFi, ideal for IoT, automation, and embedded system projects.
Arduino UNO R4 WiFi board MADE IN CHINA
The Arduino UNO R4 WiFi (China Version) is an advanced upgrade of the classic UNO platform, combining high-performance processing with integrated wireless connectivity. Built around a modern 32-bit microcontroller, it delivers significantly improved speed, memory, and functionality compared to previous UNO generations. The board maintains the familiar UNO form factor, making it compatible with a wide range of existing shields and accessories, while adding enhanced capabilities for modern applications.
One of the key highlights of this board is its integrated WiFi module, enabling seamless connection to cloud services, IoT platforms, and remote control systems without the need for external modules. It is ideal for developers, students, and hobbyists looking to build smart devices, connected sensors, and automation systems. The China version provides a cost-effective alternative while maintaining most of the core features and usability expected from the UNO R4 WiFi platform.
Features:
- Built-in WiFi connectivity for IoT applications.
- Improved processing performance over previous UNO versions.
- Compatible with standard Arduino UNO shields.
- USB interface for programming and power.
- Onboard peripherals for extended functionality.
- Easy integration with Arduino IDE.
- Suitable for beginners and advanced users.
- Reliable and compact development platform.
PINOUT:
Specifications:
| Attribute | Value |
|---|---|
| Brand: | Arduino UNO |
| Model No: | UNO R4 WiFi |
| Main Microcontroller: | Renesas R7FA4M1AB3CFM (48MHz Arm® Cortex®-M4 Core with FPU) |
| WiFi Co-Processor: | ESP32-S3 (ESP32-S3-MINI-1-N8) |
| Flash Memory (Code): | 256 kB |
| SRAM: | 32 kB |
| Flash Memory (Data / EEPROM): | 8 kB |
| Input Voltage Range (DC Jack): | 4V ~ 18V DC |
| R7FA4M1 MCU Operating Voltage: | 5V DC |
| ESP32-S3 Operating Voltage: | 3.3V DC |
| USB Connector Type: | Female USB Type-C Socket |
| Digital I/O Pins: | 14 (D0 to D13) |
| Analog Input Pins: | 6 (A0 to A5) |
| PWM Output Pins: | 6 (D3, D5, D6, D9, D10, D11) |
| Peripherals: | Capacitive Touch Sensing Unit, USB 2.0 Full Speed (HID), RTC & VRTC pin, up to 14‑bit ADC, up to 12‑bit DAC, Operational Amplifier, 1x CAN (D4,D5 – external transceiver required), 1x SPI (D10‑D13 / ICSP), 1x I2C (A4,A5 / Qwiic connector), 1x UART (D0,D1) |
| Other: | 12×8 Red LED Matrix (96 pixels), OFF pin to turn board off, DIP switch to switch USB port between RA4M1 and ESP32‑S3 |
| Operating Temperature Range: | -40°C to +85°C |
| Dimensions: | 68.58 mm × 53.34 mm × 15 mm |
Note: This board is a compatible/non-original version of the Arduino R4 WiFi. The onboard LED matrix driver IC has limited power handling capability compared to the original board design. Operating the LED matrix at full brightness or for extended periods may cause the responsible IC to overheat and become damaged. In some cases, this may also affect the onboard 12V DC input circuit, causing the external DC jack power input to stop functioning properly, while the board may continue to operate normally through the USB Type-C port only.
To ensure stable and reliable operation, it is strongly recommended to avoid intensive or continuous use of the onboard LED matrix and instead utilize the board for its other features and functionalities. Under normal usage without heavy LED matrix load, the board should operate properly without issues.
Applications:
- IoT (Internet of Things) Projects.
- Robotics and Automation.
- Smart Agriculture.
- Wearable Technology and Health Monitoring.
- Smart City Applications.
- Education & Learning.
- Home Security Systems.
- Artificial Intelligence & Edge Computing.
Packages Included:
- 1x Arduino UNO R4 WiFi board MADE IN CHINA.