Processor: ARM cortex M4 
Memory: 256KBF1ash/32KBSRAM 
Operating Voltage: 5V 
Input Voltage: 6~24V 
Clock Frequency: 48MHz 
Programming port: USB-C 
Programming port: USB-C 
WiFi/Bluetooth: ESP32-S3-MINI 
Light Emitting Diode Matrix: 12x8( 96 red LEDs) 
Additional connections: Qwiic connector, OFF pin, VRTC pin 
Number of digital 1/0 interfaces: 14 
Number of PWM interfaces: 6 
Number of ADC interfaces: 6 
Number of DAC interfaces: 1 (12-bit) 
Number of SPI interfaces: 1 
Number of I2C interfaces: 1 
Number of CAN interfaces: 1

UNO R4 WIFI is an ESP32-S3 microcontroller-based development board from Arduino, combining the classic design of Arduino UNO with Wi-Fi functionality.

1. Microcontroller 
Model: ESP32-S3 
Architecture: 32-bit XtensaLX7 Dual-Core Processor 
Main Frequency: 240MHz 
Flash Memory: 16MB 
SRAM: 512 KB 
PSRAM: 8 MB 

2. Wireless Connectivity 
Wi-Fi: supports 802.11 b/g/n (2.4 GHz) 
Bluetooth: supports Bluetooth 5.0 (including BLE) 

3. GPIO Pins 
Digital I/O pins: 14 (6 of them support PWM output) 
Analog Input pins: 6 (10-bit ADC) 
UART:2 
I2C:1 
SPI:1 

4. Power Supply 
Operating Voltage: 5V 
Input Voltage: 6-20V (7-12V is recommended) 
USB Interface: TYPE-C 

5 . Other Features 
LED Indicator: Built-in RGB LED 
Reset Button:1pc 
User Button:1pc 
Dimensions: Same as standard Arduino UNO (68.6mm x 53.4mm) 

6. Development Environment 
IDE: Support Arduino IDE
Programming Language: C/C++ 

7. Compatibility 
Expansion Board Compatibility: Compatible with most Arduino UNO Expansion Boards (Shields) 

8. Power Consumption 
Operating Current: Approx. 80mA (when Wi-Fi is on) 
Standby Current: Approx. 5mA

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