Arduino Uno R4 WiFi

Hardware

Platform Renesas RA: Renesas Advanced (RA) 32-bit microcontrollers with the Arm Cortex-M33, -M23 and -M4 processor cores deliver key advantages compared to competitive Arm Cortex-M MCUs by providing stronger embedded security, superior CoreMark performance and ultra-low power operation.

Microcontroller	RA4M1
Frequency	48MHz
Flash	256KB
RAM	32KB
Vendor	Arduino

Configuration

Please use uno_r4_wifi ID for board option in “platformio.ini” (Project Configuration File):

[env:uno_r4_wifi]
platform = renesas-ra
board = uno_r4_wifi

You can override default Arduino Uno R4 WiFi settings per build environment using board_*** option, where *** is a JSON object path from board manifest uno_r4_wifi.json. For example, board_build.mcu, board_build.f_cpu, etc.

[env:uno_r4_wifi]
platform = renesas-ra
board = uno_r4_wifi

; change microcontroller
board_build.mcu = ra4m1

; change MCU frequency
board_build.f_cpu = 48000000L

Uploading

Arduino Uno R4 WiFi supports the following uploading protocols:

• cmsis-dap

• jlink

• sam-ba

Default protocol is sam-ba

You can change upload protocol using upload_protocol option:

[env:uno_r4_wifi]
platform = renesas-ra
board = uno_r4_wifi

upload_protocol = sam-ba

Debugging

Debugging - “1-click” solution for debugging with a zero configuration.

Warning

You will need to install debug tool drivers depending on your system. Please click on compatible debug tool below for the further instructions and configuration information.

You can switch between debugging Tools & Debug Probes using debug_tool option in “platformio.ini” (Project Configuration File).

Arduino Uno R4 WiFi does not have on-board debug probe and IS NOT READY for debugging. You will need to use/buy one of external probe listed below.

Compatible Tools	On-board	Default
CMSIS-DAP		Yes
J-LINK

Frameworks

Name	Description
Arduino	Arduino Wiring-based Framework allows writing cross-platform software to control devices attached to a wide range of Arduino boards to create all kinds of creative coding, interactive objects, spaces or physical experiences.
CMSIS	Vendor-independent hardware abstraction layer for the Cortex-M processor series
Renesas Flexible Software Package	The Renesas Flexible Software Package (FSP) is an enhanced software package designed to provide easy-to-use, scalable, high-quality software for embedded system designs using Renesas RA family of Arm Microcontrollers.