Arduino
Arduino UNO R3
HUK-54209
The classic Arduino board: ATmega328P at 16MHz with 14 digital I/O pins, 6 analogue inputs and USB-B, in a removable DIP package.
Back in stock soon£24.40£20.33£20.33 ex VAT£24.40 inc VAT
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Arduino
Arduino UNO R4 WiFi
UNO R4 with an ESP32-S3 for Wi-Fi and Bluetooth, a 12×8 LED matrix, a Qwiic connector and USB-C.
Temporarily out of stock · back soon£25.39£21.16inc VATex VAT
£21.16 ex VAT£25.39 inc VAT
Free UK delivery over £100. Next working day available.
14-day returns on unopened items.
VAT invoice emailed with every order. Trade accounts available.
Product information
Arduino UNO R4 WiFi pairs the Renesas RA4M1 (Arm Cortex-M4 at 48MHz) with an Espressif ESP32-S3 module for Wi-Fi and Bluetooth, in the standard UNO form factor with 5V logic. A built-in 12×8 red LED matrix lets you show animations and data without extra parts.
It also adds a Qwiic connector for plug-and-play I2C modules, a real-time clock, a CAN bus, a 12-bit DAC and USB-C, and works with the Arduino Cloud.
Key features
- Microcontroller: Renesas RA4M1 (Arm® Cortex®-M4)
- USB-C®: Programming Port
- Digital I/O Pins: 14
- Analog input pins: 6
| Microcontroller | Renesas RA4M1 (Arm® Cortex®-M4) |
|---|---|
| USB-C® | Programming Port |
| Digital I/O Pins | 14 |
| Analog input pins | 6 |
| DAC | 1 |
| PWM pins | 6 |
| UART | Yes, 1x |
| I2C | Yes, 1x |
| SPI | Yes, 1x |
| CAN | Yes 1 CAN Bus |
| 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 |
| Main core | 48 MHz |
| ESP32-S3 | up to 240 MHz |
| RA4M1 | 256 kB Flash, 32 kB RAM |
| ESP32-S3 | 384 kB ROM, 512 kB SRAM |
| Width | 68.85 mm |
| Length | 53.34 mm |
| Manufacturer | Arduino |
| Manufacturer part no. | ABX00087 |
| Hossam UK code | HUK-16935 |
| Standard UK delivery | £3.95, free on orders over £100. Delivered in 2–3 working days. |
|---|---|
| Next working day | £6.95. Order by 2pm, Monday to Friday. |
| Returns | Return unopened items within 14 days for a full refund. Faulty items are covered by the manufacturer’s warranty. |
| WEEE | We offer free take-back of old electrical equipment when you buy a similar item. |
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