Waveshare R7FA4 PLUS B Development Board is an enhanced Arduino UNO R4 WiFi compatible development board built around the R7FA4M1AB3CFM microcontroller and an onboard ESP32-S3-MINI-1 wireless module. It combines the stability of the Renesas RA4M1 platform with 2.4GHz WiFi, Bluetooth LE, and a built-in 12 x 8 red LED matrix, making it a practical choice for IoT projects, wireless control panels, creative LED display experiments, sensor nodes, and education. With 48MHz Arm Cortex-M4 processing, 256KB Flash, 32KB RAM, 14 digital pins, 8 analog pins, standard Arduino UNO R4 WiFi compatible headers, a Qwiic connector, and direct support for wireless expansion, the R7FA4 PLUS B development board is well suited for connected embedded applications that need both familiar Arduino-style development and ESP32-S3 based connectivity. Features R7FA4M1AB3CFM / Renesas RA4M1 microcontroller with 32-bit Arm Cortex-M4 architecture and 48MHz main frequency ESP32-S3-MINI-1 onboard for 2.4GHz WiFi and Bluetooth LE wireless communication Arduino UNO R4 WiFi compatible form factor for easier shield integration and code migration 12 x 8 red LED matrix onboard for status display, simple animation, data indication, and interactive projects 256KB Flash and 32KB RAM on the RA4M1 side for control logic, sensor processing, and embedded application development Qwiic connector for fast I2C peripheral expansion USB Type-C for programming and serial debugging 6V to 21V external input for flexible power supply in bench and prototype setups 14 digital pins, 8 analog pins, UART, I2C, SPI, and PWM for broader hardware expansion Experimental solder pad area for DIY hardware interface extension Specifications Brand Waveshare Model R7FA4 PLUS B Main MCU R7FA4M1AB3CFM, Renesas RA4M1, 32-bit Arm Cortex-M4 Wireless Module ESP32-S3-MINI-1 Clock Frequency RA4M1: 48MHz Memory 256KB Flash, 32KB RAM Wireless 2.4GHz WiFi + Bluetooth LE Operating Voltage 3.3V Power Input 6V to 21V Digital Pins 14 Analog Pins 8 PWM 5 UART 2 I2C 1 SPI 1 LED Matrix 12 x 8 red LED matrix Interface Arduino-compatible headers, ICSP, Qwiic, USB Type-C Weight 0.049 kg Applications IoT development for wireless sensors, remote monitoring, and connected device control Arduino UNO R4 WiFi compatible prototyping for shield-based expansion and classroom development LED matrix interaction projects for animation, icon display, status indication, and simple dashboards Smart home and automation nodes using WiFi connectivity and serial peripheral expansion Wireless embedded education combining Renesas RA4M1 programming with ESP32-S3 connectivity Rapid hardware experiments with Qwiic sensors, displays, and Arduino ecosystem modules Packing List R7FA4 PLUS B x1 USB Type-A to Type-C cable x1 Other Content Board hardware overview The R7FA4 PLUS B board integrates the R7FA4M1AB3CFM MCU, ESP32-S3-MINI-1 module, MP8759 5V regulator, AMS1117-3.3 regulator, TXB0108DQSR voltage translator, Qwiic connector, USB Type-C programming interface, ICSP interface, power indicators, RX/TX indicators, user LED, Arduino-compatible headers, and a built-in 12 x 8 LED matrix for direct visual interaction. Pinout definition Outline dimensions Wireless and display integration is the biggest advantage of the Waveshare R7FA4 PLUS B Development Board. The RA4M1 handles core embedded control while the ESP32-S3 adds wireless communication, and the onboard LED matrix gives this Arduino UNO R4 WiFi compatible board a more visual and interactive development experience without requiring an extra display module. Resources Wiki Schematic Renesas RA4M1 Overview ESP32-S3 Overview Arduino UNO R4 WiFi Documentation Arduino IDE Qwiic Ecosystem FAQ What is the main difference between R7FA4 PLUS B and R7FA4 PLUS A?R7FA4 PLUS B adds onboard ESP32-S3 wireless connectivity and a 12 x 8 red LED matrix, making it more suitable for wireless IoT projects and interactive display applications. Can R7FA4 PLUS B be used like an Arduino UNO R4 WiFi compatible board?Yes. The board is designed as an Arduino UNO R4 WiFi compatible development platform, so it is suitable for Arduino-style development, shield expansion, and connected embedded projects. What can the onboard LED matrix be used for?The onboard 12 x 8 red LED matrix can be used for icons, text effects, simple animations, status output, measurement indicators, and interactive visual feedback in creative or educational applications.
