Description
Reviews
| Brand | - |
| Category | Electronic Components / Maker DIY / Development Boards & Control Boards |
| Origin | - |
| Microcontroller | Renesas RA4M1 (ARM Cortex-M4) |
| Operating Voltage | 5V |
| Digital I/O Pins | 14 |
| PWM Pins | 6 |
| Analog Input Pins | 6 |
| Flash Memory | 256 KB |
| SRAM | 32 KB |
| Clock Speed | 48 MHz |
| Connectivity | USB-C & ESP32-S3 (WiFi Edition) |
| Dimensions | 68.58 x 53.34 mm |
Anonymous
Mar 10, 2026
Rating: 4/5
Great Board, Learning Curve
Hardware is solid. Took me a bit to adjust to the new IDE support compared to the old AVR boards, but worth it.
Anonymous
Mar 01, 2026
Rating: 5/5
Excellent Upgrade
The R4 Minima is a fantastic upgrade from the classic Uno. The increased memory and speed make handling complex sketches much smoother.
Anonymous
Feb 26, 2026
Rating: 5/5
Perfect for Education
Using these for my robotics class. The USB-C port is much more durable for student use than the old Type-B.
Anonymous
Feb 19, 2026
Rating: 5/5
Genuine Arduino Quality
Received the original board as described. Pinout compatibility with existing shields saved me a lot of time.
Anonymous
Jan 26, 2026
Rating: 5/5
WiFi Connectivity is Stable
I bought the WiFi edition for an IoT project. Connecting to my home network was straightforward using the Arduino IoT Cloud.
Q: Is a USB cable included in the kit?
A: Yes, the kit includes a USB-C to USB-A cable for programming and power supply.
Q: What version of Arduino IDE is required?
A: We recommend using Arduino IDE 2.0 or later to ensure full support for the RA4M1 microcontroller architecture.
Q: Is this board compatible with existing Uno shields?
A: Yes, the UNO R4 maintains the same form factor and pinout as previous Uno boards, ensuring shield compatibility.
Q: Does the Minima version include WiFi capabilities?
A: No, only the WiFi Edition includes the ESP32-S3 module for wireless connectivity. The Minima is USB only.
Q: Can I power this board with a 9V battery?
A: Yes, you can power the board via the VIN pin or barrel jack with a voltage between 6V and 24V.
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