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Green circuit board with USB-C port, LED grid, and Qwiic connector

Arduino

Arduino UNO R4 WiFi development board

SKU CH-TRB2-9XQ20

Combines RA4M1 and ESP32-S3 chips with Wi-Fi, Bluetooth, 12x8 LED matrix and Qwiic connector

  • Combines Renesas RA4M1 and ESP32-S3 for enhanced processing
  • Built-in Wi-Fi and Bluetooth enable wireless project connectivity
  • On-board 12x8 LED matrix provides visual output capability
  • Qwiic connector allows easy I2C sensor expansion
  • Maintains UNO form factor for hardware compatibility

Built for connected projects

The Arduino UNO R4 WiFi merges a Renesas RA4M1 microcontroller with an Espressif ESP32-S3 to give makers wireless connectivity and expanded processing power in the classic UNO form factor. It adds a 12x8 LED matrix, Qwiic connector, CAN bus, 12-bit DAC, op-amp, VRTC and OFF pin for diverse project needs.

Wireless and on-board I/O

Wi-Fi and Bluetooth let the board join networks or talk to phones without extra shields. The LED matrix provides a ready-made display for status or simple graphics. Qwiic lets you chain compatible sensors with a single cable. CAN bus, DAC and op-amp bring automotive and analogue capabilities directly on board.

Drops into existing UNO setups

Hardware compatibility with the UNO footprint means most shields and enclosures fit without changes. USB-C replaces the older connector for power and programming. The wider input voltage range gives more flexibility with power supplies. Projects that need more I/O pins or a different voltage logic level will need a different board.

How it compares

Measured against everything we stock in AV Accessories & Components, at today’s prices. Recalculated every night.

Price $19.99
Cheaper than about 71% of the 3,838 comparable items (median $41.99).

Specifications

No published specifications for this item yet.

Questions about this item

Will the 12x8 LED matrix or the ESP32-S3 wireless module need replacement after long-term use?

The 12x8 LED matrix and ESP32-S3 module are soldered to the board and are not designed for user replacement; if either fails the board would need to be replaced.

What thermal limit appears first when the RA4M1 and ESP32-S3 run continuously at full load?

The board has no active cooling, so sustained full-load operation on both processors will hit the components' maximum junction temperatures first, causing automatic throttling or shutdown.

How much heat and noise does the board produce when powered all day via USB-C?

With no moving parts the board is silent; heat output is low but measurable — expect the RA4M1 and ESP32-S3 areas to become warm to the touch under continuous Wi-Fi and processing loads.

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