SKU: TH0742
The Arduino UNO Ek R4 WiFi is a latest new upgrade to the popular Arduino UNO R3 board. UNO Ek R4 has the same form factor as the UNO R3 measuring 68.58 x 53.34 mm in dimensions. UNO Ek R4 WiFi comes with a Renesas RA4M1 (Arm® Cortex®-M4) a 32-bit microprocessor clocked at 48 MHz, expanded menory with 32kB of SRAM and 256kB of flash memory and supports 5V operating voltage and also hosts a ESP32-S3 module from Espressif which adds the functionality of wireless connectivity (WiFi and Bluetooth 5.0).
The Arduino UNO Ek R4 WiFi is a latest new upgrade to the popular Arduino UNO R3 board. UNO Ek R4 has the same form factor as the UNO R3 measuring 68.58 x 53.34 mm in dimensions. UNO Ek R4 WiFi comes with a Renesas RA4M1 (Arm® Cortex®-M4) a 32-bit microprocessor clocked at 48 MHz, expanded menory with 32kB of SRAM and 256kB of flash memory and supports 5V operating voltage and also hosts a ESP32-S3 module from Espressif which adds the functionality of wireless connectivity (WiFi and Bluetooth 5.0).
Apart from the improved performance and expanded memory, it has an onboard RTC (Real Time Clock), DAC (Digital to Analog Converter), 14-bit ADC (Analog to Digital Converter), OPAMP (Operational Amplifier) and a MPU (Memory Protection Unit). All these features eliminate the need for additional components in projects, simplifying the design process.
Also turn your UNO into a keyboard or mouse! The UNO R4 WiFi built-in HID support lets you control your computer directly with keystrokes and mouse movements when connected through USB. This opens up new possibilities for interactive projects and simplifies user input.
The UNO R4 WiFi user-friendly design makes it easy to learn for beginners, while its powerful features provide ample room for experienced users to explore more complex projects. Whether you're building a sophisticated robot with advanced motor control or developing a data logger that captures and analyzes intricate sensor readings, the UNO R4 has the power and memory to handle your project's needs.
Technical details for Arduino UNO Ek R4 Wifi
| Microcontroller | Renesas RA4M1 (Arm® Cortex®-M4) |
| USB | USB-C® |
| Pins | 14x Digital I/O Pins 6x Analog Input Pins 1x DAC 6x PWM Pins |
| Communication | 1x USB (Programming Port) 1x UART 1x I2C 1x SPI 1x CAN Bus |
| Input Voltage | 6 to 24V |
| Operating Voltage | 5V ESP32-S3 is 3.3 V |
| Current per I/O Pin | 8mA |
| Clock Speed | 48 MHz ESP32-S3 up to 240 MHz |
| Memory | RA4M1 256 KB Flash 32 KB SRAM 8 KB EEPROM ESP32-S3 384 kB ROM 512 kB SRAM |
| Dimensions | 68.58 x 53.34 mm |
UNO Ek R4 mechanical drawing and board layout.
| Part | Description |
|---|---|
| U1 | R7FA4M1AB3CFM#AA0 Microcontroller IC |
| U2 | NLASB3157DFT2G Multiplexer |
| U3 | ISL854102FRZ-T Buck Converter |
| U4 | TXB0108DQSR Logic Level Shifter |
| U5 | SGM2205-3.3XKC3G Linear Regulator |
| U6 | NLASB3157DFT2G Multiplexer |
| M1 | ESP32-S3-MINI-1-N8 |
| PB1 | RESET Button |
| JANALOG | Analog IO Headers |
| JDIGITAL | Digital IO Headers |
| JOFF | OFF, VRTC Header |
| J1 | CX90B-16P USB-C® connector |
| J2 | SM04B-SRSS-TB(LF)(SN) I2C connector |
| J3 | ICSP Header (SPI) |
| J5 | DC Jack |
| J6 | ESP Header |
| DL1 | LED TX |
| DL2 | LED RX |
| DL3 | LED Power |
| DL4 | LED SCK |
Pinout for Arduino UNO Ek R4 WiFi
| Pin | Function | Description | |
|---|---|---|---|
| Analog Side | |||
| 4 | +3V3 | +3V3 Output Power Rail | |
| 5 | +5V | +5V Output Power Rail | |
| 6 | GND | Ground | |
| 7 | GND | Ground | |
| 8 | VIN | Voltage Input | |
| Digital Side | |||
| 4 | GND | Ground | |
| Pin | Function | Description | |
|---|---|---|---|
| 9 | A0 | Analog Input 0 / DAC | |
| 10 | A1 | Analog Input 1 / OPAMP+ | |
| 11 | A2 | Analog Input 2 / OPAMP- | |
| 12 | A3 | Analog Input 3 / OPAMP Out | |
| 13 | A4 / D18 | Analog Input 4 / SDA | |
| 14 | A5 / D19 | Analog Input 5 / SCL |
| Pin | Function | Description | |
|---|---|---|---|
| 1 | SCL / D19 | I2C Serial Clock | |
| 2 | SDA / D18 | I2C Serial Data | |
| 3 | AREF | Analog Reference Voltage | |
| 5 | D13 / SCK | GPIO13 / SPI Clock | |
| 6 | D12 / CIPO | GPIO12 / SPI Controller In Peripheral Out | |
| 7 | D11 / COPI | GPIO11 / SPI Controller Out Peripheral In | |
| 8 | D10 / CS | GPIO 10 / SPI Chip Select | |
| 9 | D9 | GPIO 9 (PWM ~) | |
| 10 | D8 | GPIO 8 | |
| 11 | D7 | GPIO 7 | |
| 12 | D6 | GPIO 6 (PWM ~) | |
| 13 | D5 / CANRX0 | GPIO 5 (PWM ~) / CAN Transmitter (TX) | |
| 14 | D4 / CANTX0 | GPIO 4 / CAN Receiver (RX) | |
| 15 | D3 | GPIO 3 (PWM ~) / Interrupt Pin | |
| 16 | D2 | GPIO 2 / Interrupt Pin | |
| 17 | D1 / TX0 | GPIO 1 / Serial 0 Transmitter (TX) | |
| 18 | D0 / RX0 | GPIO 0 / Serial 0 Receiver (RX) |
Pinout and pin position for ICSP Header
| RESET | SCK | CIPO |
| GND | COPI | +5V |
| OFF | For controlling power supply |
| GND | Ground |
| VRTC | Battery connection to power RTC only |
Let's compare the all new UNO R4, UNO R4 WiFi and the world famous UNO R3.
| UNO R4 Wifi
New!
|
UNO R4 Minima
New!
|
UNO R3 | |
|---|---|---|---|
| Microcontroller | Renesas RA4M1 (Arm® Cortex®-M4) | Renesas RA4M1 (Arm® Cortex®-M4) | ATmega328P (8-bit AVR® RISC-based microcontroller) |
| USB | USB-C® | USB-C® | USB B Connector |
| Pins | 14x Digital I/O Pins 6x Analog Input Pins 1x DAC 6x PWM Pins |
14x Digital I/O Pins 6x Analog Input Pins 1x DAC 6x PWM Pins |
14x Digital I/O Pins 6x Analog Input Pins 6x PWM Pins |
| Communication | 1x USB (Programming Port) 1x UART 1x I2C 1x SPI 1x CAN Bus |
1x USB (Programming Port) 1x UART 1x I2C 1x SPI 1x CAN Bus |
1x USB (Programming Port) 1x UART 1x I2C 1x SPI |
| Input Voltage | 6 to 24V | 6 to 24V | 7 to 12V (Recommended) 6 to 20V (limit) |
| Operating Voltage | 5V | 5V | 5V |
| Current per I/O Pin | 8mA | 8mA | 20mA |
| Clock Speed | 48 MHz ESP32-S3 up to 240 MHz |
48 MHz | 16 MHz |
| Memory | RA4M1 256 KB Flash 32 KB SRAM 8 KB EEPROM ESP32-S3 384 kB ROM 512 kB SRAM |
256 KB Flash 32 KB SRAM 8 KB EEPROM |
32 KB Flash 2 KB SRAM 1 KB EEPROM |
| Dimensions | 68.58 x 53.34 mm | 68.58 x 53.34 mm | 68.58 x 53.34 mm |
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