Home Hardware Arduino Uno R4 Minima and Arduino Uno R4 Wifi have arrived

Arduino Uno R4 Minima and Arduino Uno R4 Wifi have arrived

by shedboy71

Ok I now have 1 of each of the Arduino Uno R4 Minima and Arduino Uno R4 Wifi and as always a little bit of excitement if you are into this sort of thing – especially when Arduino release a reasonably priced board

Here they are out of the boxes

Here are the technical specs of both boards, if you are from the older Arduino Uno days I have highlighted things that I found interesting in bold

Arduino R4 Minima

 

Board Name Arduino® UNO R4 Minima
SKU ABX00080
Microcontroller Renesas RA4M1 (Arm® Cortex®-M4)
USB USB-C® Programming Port
Pins Digital I/O Pins 14
Pins Analog input pins 6
DAC 1
PWM pins 6
Communication UART Yes, 4x
I2C Yes, 1x
SPI Yes, 1x
CAN Yes 1 CAN Bus
Power Circuit operating voltage 5 V
Input voltage (VIN) 6-24 V
DC Current per I/O Pin 8 mA
Clock speed Main core 48 MHz
Memory RA4M1 256 kB Flash, 32 kB RAM
Dimensions Width 68.85 mm
Length 53.34 mm

Arduino Uno R4 Wifi

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
DAC 1
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

 

Summary

I'll be using these on this site in some examples going forward

The one that interests me the most is the Wifi board which has a 12-bit DAC, CAN BUS, OP AMP , a 12×8 red LED matrix, Wifi, and Bluetooth using an ESP32-S3 module, there are also some other features such as a QWIC connector which matches with a lot of the sensors I have

There are also features such as faster clock speed and more memory but its the ESP32 that excites me – a reasonably priced Arduino made, UNO form factor meaning that existing shields should work (I'll put that to the tests) and the ability to use Wifi and Bluetooth certainly open this up to some interesting IoT projects

I also notice that both boards offer HID support so you can simulate a keyboard and/or mouse and there are a couple of other features such as 24v power input  range – that may help you connect more power hungry devices such as motors and led strips using the same power source, which is always handy rather than having a multi voltage supply or even more than one supply. Again I will be looking at that.

 

Links

Fans of schematics and specs – who isn't here you go

https://docs.arduino.cc/resources/schematics/ABX00087-schematics.pdf

https://docs.arduino.cc/resources/datasheets/ABX00087-datasheet.pdf

https://docs.arduino.cc/resources/schematics/ABX00080-schematics.pdf

https://docs.arduino.cc/resources/datasheets/ABX00080-datasheet.pdf

Pricing

Its about 18 euros for the R4 Minima and 25 euros for the Wifi variant – for an official board that's not too bad

Thanks to https://shop.sb-components.co.uk/ for the prompt service and having them in stock. Not an a affiliate link – although we all have our price 🙂

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