Home Hardware The Arduino R4 clones are here

The Arduino R4 clones are here

by shedboy71

It was only a matter of time after the Arduino R4 boards were released that we would get some clone boards. In this article we will look at 2 of the Arduino R4 Wifi boards

Lets look at these boards with this image that I took of them side by side.

r4 wifi boards

In case you do not know in the image above, from the left its the 2 clone boards then the official R4 Wifi board on the right. We will refer  to these as boards 1 and 2

They have the same general spec as the official board, if you are unaware of what the R4 Wifi gives you, lets recap

Board Name Arduino® UNO R4 WiFi
SKU ABX00087
Microcontroller Renesas RA4M1 (Arm® Cortex®-M4)
USB USB-C® Programming Port
Pins Digital I/O Pins 14
Pins Analog input pins 6
PWM pins 6
Communication UART Yes, 4x
I2C Yes, 1x
SPI Yes, 1x
CAN Yes 1 CAN Bus
Power Circuit operating voltage 5 V (ESP32-S3 is 3.3 V)
Input voltage (VIN) 6-24 V
DC Current per I/O Pin 8 mA
Clock speed Main core 48 MHz
ESP32-S3 up to 240 MHz
Memory RA4M1 256 kB Flash, 32 kB RAM
ESP32-S3 384 kB ROM, 512 kB SRAM
Dimensions Width 68.85 mm
Length 53.34 mm

Now board 2 has extra headers which I do like on a board like this – very handy for connecting cables directly to the headers. There is the typical 2 pins for power and gnd and then one for I/O. All of the I/O is brought out to these headers as well as the standard Uno header setup.

Arduino IDE

I saw no issues with the IDE, both boards were recognized and assigned com ports on my Windows 10 system. I uploaded one of the LED matrix examples and compiled and programmed as expected.



board 1 Price is £12.34
board 2 ABout £15 although the price varies on Aliexpress
official r4 Wifi board About 25 euros from the official store



Now some people do not want to use clone boards, that is fair enough but from a quality and pricing point they are a good option. Of course if you want to support Arduino and their great efforts with developing boards, the work with the development tools and documentation then purchase from them.


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