{
 "slug": "arduino-uno-r4-wifi",
 "name": "Arduino UNO R4 WiFi",
 "maker": "Arduino",
 "category": "boards",
 "categoryLabel": "Boards & controllers",
 "status": "listed",
 "statusLabel": "Listed by maker",
 "description": "Prototype controls, sensors and small connected displays.",
 "goodFor": "Prototype controls, sensors and small connected displays.",
 "youNeed": "USB data cable, Arduino tools and voltage-compatible components.",
 "tradeoff": "UNO R4 firmware and libraries are not universally interchangeable with UNO R3.",
 "tags": [
  "build",
  "ble"
 ],
 "price": "US$27.50",
 "priceShort": "$27.50",
 "priceFrom": "store-usa.arduino.cc",
 "checked": "2026-09-15",
 "url": "https://gadgets.sh/devices/arduino-uno-r4-wifi/",
 "shortUrl": "https://gadgets.sh/arduino-uno-r4-wifi",
 "markdown": "https://gadgets.sh/devices/arduino-uno-r4-wifi.md",
 "image": "https://gadgets.sh/assets/arduino-uno-r4-wifi.jpg",
 "cutout": "https://gadgets.sh/assets/cutouts/arduino-uno-r4-wifi.webp",
 "shareCard": "https://gadgets.sh/og/arduino-uno-r4-wifi.jpg",
 "shops": [
  {
   "merchant": "Arduino",
   "label": "Buy from Arduino",
   "kind": "shop",
   "orderable": true,
   "url": "https://store.arduino.cc/products/uno-r4-wifi?utm_source=gadgets.sh&utm_medium=referral&utm_campaign=arduino-uno-r4-wifi&utm_content=api",
   "note": "In stock at Arduino when checked on 2026-09-24."
  },
  {
   "merchant": "Arduino US",
   "label": "Buy from Arduino US",
   "kind": "shop",
   "orderable": true,
   "url": "https://store-usa.arduino.cc/products/uno-r4-wifi?utm_source=gadgets.sh&utm_medium=referral&utm_campaign=arduino-uno-r4-wifi&utm_content=api",
   "note": "In stock at Arduino when checked on 2026-09-24."
  },
  {
   "merchant": "Amazon",
   "label": "Buy from Amazon",
   "kind": "shop",
   "orderable": true,
   "url": "https://www.amazon.com/dp/B0C8V88Z9D?utm_source=gadgets.sh&utm_medium=referral&utm_campaign=arduino-uno-r4-wifi&utm_content=api",
   "note": null
  },
  {
   "merchant": "DFRobot",
   "label": "Buy from DFRobot",
   "kind": "shop",
   "orderable": true,
   "url": "https://www.dfrobot.com/product-2700.html?utm_source=gadgets.sh&utm_medium=referral&utm_campaign=arduino-uno-r4-wifi&utm_content=api",
   "note": "In stock at DFRobot when checked on 2026-09-24."
  },
  {
   "merchant": "Seeed Studio",
   "label": "Buy from Seeed Studio",
   "kind": "shop",
   "orderable": true,
   "url": "https://www.seeedstudio.com/Arduino-Uno-Rev4-WiFi-p-5717.html?utm_source=gadgets.sh&utm_medium=referral&utm_campaign=arduino-uno-r4-wifi&utm_content=api",
   "note": "In stock at Seeed Studio when checked on 2026-09-24."
  },
  {
   "merchant": "Arduino",
   "label": "Documentation at docs.arduino.cc",
   "kind": "docs",
   "orderable": false,
   "url": "https://docs.arduino.cc/hardware/uno-r4-wifi/?utm_source=gadgets.sh&utm_medium=referral&utm_campaign=arduino-uno-r4-wifi&utm_content=api",
   "note": "This link is the maker’s documentation. Ordering may be elsewhere on their site."
  }
 ],
 "specs": [
  {
   "group": "Processors & display",
   "rows": [
    {
     "label": "Main MCU",
     "value": "Renesas RA4M1 Cortex-M4F, 48 MHz",
     "source": "https://docs.arduino.cc/resources/datasheets/ABX00087-datasheet.pdf"
    },
    {
     "label": "Main memory",
     "value": "256 KB flash, 32 KB SRAM, 8 KB data EEPROM",
     "source": "https://docs.arduino.cc/resources/datasheets/ABX00087-datasheet.pdf"
    },
    {
     "label": "Wireless MCU",
     "value": "ESP32-S3-MINI-1-N8; separate 3.3 V processor",
     "source": "https://docs.arduino.cc/resources/datasheets/ABX00087-datasheet.pdf"
    },
    {
     "label": "Wireless",
     "value": "2.4 GHz 802.11b/g/n and Bluetooth 5 LE",
     "source": "https://docs.arduino.cc/resources/datasheets/ABX00087-datasheet.pdf"
    },
    {
     "label": "Bluetooth software",
     "value": "UNO R4 WiFi is on Arduino’s supported BLE list; no Classic support claim",
     "source": "https://support.arduino.cc/hc/en-us/articles/4407129094546-Boards-and-shields-with-wireless-connectivity"
    },
    {
     "label": "Display",
     "value": "12 × 8 red LED matrix",
     "source": "https://docs.arduino.cc/hardware/uno-r4-wifi/"
    }
   ]
  },
  {
   "group": "Pins & power",
   "rows": [
    {
     "label": "I/O",
     "value": "14 digital pins and six analog inputs",
     "source": "https://docs.arduino.cc/resources/pinouts/ABX00087-full-pinout.pdf"
    },
    {
     "label": "Logic levels",
     "value": "Main headers: 5 V; ESP header and Qwiic: 3.3 V only",
     "source": "https://docs.arduino.cc/resources/pinouts/ABX00087-full-pinout.pdf"
    },
    {
     "label": "GPIO current",
     "value": "8 mA maximum per RA4M1 GPIO; power motors separately",
     "source": "https://docs.arduino.cc/resources/datasheets/ABX00087-datasheet.pdf"
    },
    {
     "label": "I²C",
     "value": "Wire on A4/A5; Wire1 on the 3.3 V Qwiic connector",
     "source": "https://docs.arduino.cc/resources/datasheets/ABX00087-datasheet.pdf"
    },
    {
     "label": "SPI / UART",
     "value": "SPI on D10–D13 or ICSP; UART on D0/D1",
     "source": "https://docs.arduino.cc/resources/datasheets/ABX00087-datasheet.pdf"
    },
    {
     "label": "CAN connection",
     "value": "D13 receive / D10 transmit; external transceiver required",
     "source": "https://docs.arduino.cc/tutorials/uno-r4-wifi/can/"
    },
    {
     "label": "ADC / DAC",
     "value": "Up to 14-bit ADC; 12-bit DAC on A0",
     "source": "https://docs.arduino.cc/resources/datasheets/ABX00087-datasheet.pdf"
    },
    {
     "label": "Supply input",
     "value": "USB-C: 5 V; VIN/barrel jack: 6–24 V",
     "source": "https://docs.arduino.cc/resources/datasheets/ABX00087-datasheet.pdf"
    }
   ]
  },
  {
   "group": "Setup & recovery",
   "rows": [
    {
     "label": "IDE setup",
     "value": "Install Arduino IDE 2 and the UNO R4 board package; select WiFi model",
     "source": "https://docs.arduino.cc/tutorials/uno-r4-wifi/r4-wifi-getting-started/"
    },
    {
     "label": "Programming cable",
     "value": "USB-C data cable; board registration is optional",
     "source": "https://docs.arduino.cc/tutorials/uno-r4-wifi/r4-wifi-getting-started/"
    },
    {
     "label": "Connectivity firmware",
     "value": "IDE 2.2.1+ has Tools → Firmware Updater for the ESP32-S3 bridge",
     "source": "https://support.arduino.cc/hc/en-us/articles/9670986058780-Update-the-connectivity-module-firmware-on-UNO-R4-WiFi"
    },
    {
     "label": "After updating",
     "value": "Updater overwrites the sketch; unplug/reconnect before uploading again",
     "source": "https://support.arduino.cc/hc/en-us/articles/9670986058780-Update-the-connectivity-module-firmware-on-UNO-R4-WiFi"
    },
    {
     "label": "Bridge recovery",
     "value": "Use the board-specific espflash recovery if USB identification is lost",
     "source": "https://support.arduino.cc/hc/en-us/articles/16379769332892-Restore-the-USB-connectivity-firmware-on-UNO-R4-WiFi-with-espflash"
    },
    {
     "label": "Library migration",
     "value": "Check the UNO R4 compatibility list before reusing AVR code or shields",
     "source": "https://github.com/arduino/uno-r4-library-compatibility"
    },
    {
     "label": "Hardware files",
     "value": "Published pinout, schematic, CAD and STEP downloads",
     "source": "https://docs.arduino.cc/hardware/uno-r4-wifi/"
    }
   ]
  }
 ],
 "docs": [
  {
   "label": "UNO R4 WiFi overview and CAD downloads",
   "url": "https://docs.arduino.cc/hardware/uno-r4-wifi/"
  },
  {
   "label": "UNO R4 WiFi user manual / datasheet",
   "url": "https://docs.arduino.cc/resources/datasheets/ABX00087-datasheet.pdf"
  },
  {
   "label": "UNO R4 WiFi full pinout",
   "url": "https://docs.arduino.cc/resources/pinouts/ABX00087-full-pinout.pdf"
  },
  {
   "label": "UNO R4 WiFi schematics",
   "url": "https://docs.arduino.cc/resources/schematics/ABX00087-schematics.pdf"
  },
  {
   "label": "Arduino-authored UNO R4 WiFi CAN wiring guide",
   "url": "https://docs.arduino.cc/tutorials/uno-r4-wifi/can/"
  },
  {
   "label": "Arduino-authored IDE and board-package setup",
   "url": "https://docs.arduino.cc/tutorials/uno-r4-wifi/r4-wifi-getting-started/"
  },
  {
   "label": "Connectivity firmware update and reconnect requirement",
   "url": "https://support.arduino.cc/hc/en-us/articles/9670986058780-Update-the-connectivity-module-firmware-on-UNO-R4-WiFi"
  },
  {
   "label": "ESP32-S3 USB bridge recovery",
   "url": "https://support.arduino.cc/hc/en-us/articles/16379769332892-Restore-the-USB-connectivity-firmware-on-UNO-R4-WiFi-with-espflash"
  },
  {
   "label": "UNO R4 library compatibility list",
   "url": "https://github.com/arduino/uno-r4-library-compatibility"
  },
  {
   "label": "Arduino-supported wireless connectivity",
   "url": "https://support.arduino.cc/hc/en-us/articles/4407129094546-Boards-and-shields-with-wireless-connectivity"
  }
 ],
 "blueprint": {
  "openness": "schematics",
  "opennessLabel": "Schematics published",
  "summary": "Arduino publishes an official schematic PDF, full pinout PDF and datasheet PDF for the board; no editable Eagle/KiCad source files were found.",
  "files": [
   {
    "kind": "schematic",
    "label": "UNO R4 WiFi schematics (PDF)",
    "url": "https://docs.arduino.cc/resources/schematics/ABX00087-schematics.pdf",
    "format": "PDF"
   },
   {
    "kind": "pinout",
    "label": "UNO R4 WiFi full pinout (PDF)",
    "url": "https://docs.arduino.cc/resources/pinouts/ABX00087-full-pinout.pdf",
    "format": "PDF"
   },
   {
    "kind": "datasheet",
    "label": "UNO R4 WiFi board datasheet (PDF)",
    "url": "https://docs.arduino.cc/resources/datasheets/ABX00087-datasheet.pdf",
    "format": "PDF"
   }
  ],
  "repos": [],
  "parts": [
   {
    "part": "Renesas RA4M1 (R7FA4M1AB), Cortex-M4, 48 MHz",
    "role": "main MCU",
    "datasheet": "https://www.renesas.com/en/products/ra4m1"
   },
   {
    "part": "ESP32-S3-MINI-1-N8",
    "role": "Wi-Fi/BLE co-processor module",
    "datasheet": "https://www.espressif.com/sites/default/files/documentation/esp32-s3-mini-1_esp32-s3-mini-1u_datasheet_en.pdf"
   }
  ],
  "notes": "All three docs.arduino.cc PDFs returned HTTP 200. No arduino/* GitHub repo with Eagle/KiCad source for this specific board was found (searched GitHub for ABX00087 and \"uno r4\" eagle/kicad — no hits), so classified as schematics-only rather than open-hardware.",
  "checked": "2026-09-27"
 },
 "sourceFiles": null,
 "firmware": [],
 "chips": [
  "ra4m1",
  "esp32-s3"
 ]
}