Arduino · Renesas RA
Arduino Uno R4 WiFi
The Uno, modernised: same shield layout and 5 V pins, but a 32-bit Cortex-M4, Wi-Fi/BLE, a 12×8 LED matrix, CAN and a Qwiic connector.
Wi-FiBLE5 V logicUno
Typical price
$27.50
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Specifications
| Maker | Arduino |
|---|---|
| Chip | Renesas RA4M1 + ESP32-S3 |
| CPU | Arm Cortex-M4F |
| Clock speed | 48 MHz |
| Wi-Fi | Wi-Fi 4 (802.11 b/g/n, via ESP32-S3) |
| Bluetooth | Bluetooth 5 (via ESP32-S3) |
| Zigbee / Thread radio | No |
| GPIO pins | 20 usable |
| ADC | 6 channels, 14-bit |
| DAC | 1 channel |
| Flash | 256 KB |
| RAM | 32 KB |
| Logic level | 5 V |
| Power input | 6–24V barrel / 5V USB-C |
| Deep sleep (typ.) | ~6 mA |
| Active current (typ.) | ~60 mA |
| Form factor | Uno |
| USB | USB-C |
| Programming | Arduino C++ |
| Released | 2023 |
Typical values. Sleep current is approximate; whole-board numbers are higher than the bare chip's datasheet figure.
Pros
- Keeps 5 V logic and the Uno shield footprint
- Wi-Fi, Bluetooth and a built-in LED matrix
- Real DAC and 14-bit ADC
Cons
- Costs far more than a Pico or ESP32
- Smaller community than the R3 so far
- Radio runs on a separate chip with limited access
Best use cases
- 01Upgrading classic Uno projects
- 02Classroom IoT with 5 V shields
- 03LED-matrix displays
- 04Learning with official Arduino Cloud
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