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Arduino UNO R4 WiFi
An Arduino board combining a Renesas microcontroller with wireless connectivity. Check libraries and shields against this exact model.
Documentation profile · By Admin · Not hands-on tested.
Choose the role and setup
WiFi model, not UNO R4 Minima
Separate processing roles
The Renesas main controller and ESP32-S3 connectivity module have different responsibilities. Follow the board documentation rather than treating the board as an ordinary ESP32 development kit.
Plan the dependencies
Supported board package and data-capable USB cable; verify shield, library and pin compatibility.
Check the whole signal path
Record the sensor supply, signal voltage and library versions. Confirm pin compatibility with the official pinout before connecting a shield; a matching connector shape is insufficient.
Documented specifications
Main processor
Renesas RA4M1 Cortex-M4 at 48 MHz
Main memory
32 KB
Main flash memory
256 KB
Wireless module
ESP32-S3
GPIO voltage
5 V
Check the whole signal path
Record the sensor supply, signal voltage and library versions. Confirm pin compatibility with the official pinout before connecting a shield; a matching connector shape is insufficient.
Dependencies and recovery
Supported board package and data-capable USB cable; verify shield, library and pin compatibility.
Keep a supported update and recovery process. A development board is a building block, not a certified finished appliance. Design any enclosure, power protection and unattended operation for the actual application.
Evidence and buying checks
This is a documentation profile, not a hands-on test. IoTPapa has not measured reliability, power use, radio range or application performance. No test verdict or product score is assigned.
Indian availability, price and seller warranty not verified.
Profile updated 18 October 2026. By Admin. Individual specification records retain their source and review date.
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