{"title":"Arduino UNO R4 WiFi Development Board","handle":"arduino-uno-r4-wifi-development-board","url":"/products/arduino-uno-r4-wifi-development-board","description":"The Arduino UNO R4 WiFi is the latest evolution of the iconic UNO series, powered by the Renesas RA4M1 (Arm Cortex-M4) processor running at 48 MHz — a 3× speed increase over the UNO R3. With 256 KB flash, 32 KB SRAM, USB-C, and built-in Wi-Fi/Bluetooth via an ESP32-S3 module, it's a major upgrade while maintaining full compatibility with existing UNO shields and the 5V ecosystem.\n\nNew onboard peripherals include a 12-bit DAC, CAN bus, op-amp, Qwiic I2C connector, and a 12×8 red LED matrix for animations and sensor data display. The board supports HID emulation, battery-powered RTC, and input voltages up to 24V for direct integration with motors and LED strips.\n\nKey Features\n\n\nRenesas RA4M1 Processor – Arm Cortex-M4 at 48 MHz, 3× faster than UNO R3\n\nWi-Fi & Bluetooth – ESP32-S3 module for wireless connectivity and Arduino IoT Cloud\n\n12×8 LED Matrix – 96 red LEDs for animations, status displays, and sensor plots\n\n256 KB Flash / 32 KB SRAM – 8× more flash and 16× more RAM than UNO R3\n\nUSB-C – Modern connector with HID support (mouse/keyboard emulation)\n\n24V Input Tolerance – Direct integration with motors, LED strips, and actuators\n\n12-Bit DAC – Analog output for audio and waveform generation\n\nCAN Bus – Industrial communication with minimal wiring\n\nQwiic Connector – Easy I2C connection to the Qwiic sensor ecosystem\n\nBattery-Powered RTC – VRTC pin keeps the real-time clock running when the board is off\n\nRuntime Error Diagnostics – Detects crashes and provides line-level debugging hints\n\nUNO Form Factor – Same pinout and shield compatibility as UNO R3\n\n\nSpecifications\n\n\nMCU – Renesas RA4M1 (Arm Cortex-M4)\n\nClock Speed – 48 MHz\n\nFlash – 256 KB\n\nSRAM – 32 KB\n\nOperating Voltage – 5V\n\nInput Voltage – 6–24V\n\nWi-Fi / BLE – ESP32-S3-MINI\n\nDigital I/O – 14 (6 PWM)\n\nAnalog Inputs – 6 (ADC)\n\nDAC – 1 (12-bit)\n\nSPI – 1\n\nI2C – 2\n\nCAN – 1\n\nLED Matrix – 12 × 8 (96 red LEDs)\n\nUSB – Type-C\n\n\nIdeal For\n\nIoT projects with Arduino IoT Cloud integration\nUpgrading existing UNO R3-based projects\nPrototyping with wireless connectivity\nEducation and learning embedded programming\n\n\nPackage Contents\n\n1× Arduino UNO R4 WiFi Development Board\n","vendor":"DFRobot","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":597,"title":"Default Title","sku":"DF-DFR1084","mpn":"DFR1084","price":66.51,"on_sale":false,"in_stock":true,"available_quantity":71,"option1":"Default Title"}]}