Track your order
Uno R3 Official Box Atmega16u2 Uno+Wifi R3 Original Atmega328p Chip Ch340g For Arduino Uno R3 Development Board Wemos E

Uno R3 Official Box Atmega16u2 Uno+Wifi R3 Original Atmega328p Chip Ch340g For Arduino Uno R3 Development Board Wemos E

product reviews 
1. Plug in the UNO development board, the driver will be installed automatically

2. Select the board UNO in die

3. Select the COM port, this can be queried in my computer, the port in your uno development board just now

4. It's best to choose first, the built-in routine program, burn it in



Feature description

      Open the circuit diagram of the original design, the development software interface is free to download, and you can also modify it yourself according to your needs. The downloading program is simple and convenient. You can simply use sensors and various electronic component connections (such as: LED lights, buzzers, buttons, photoresistors, etc.) to make a variety of interesting works.

      Using the high-speed microprocessor controller (ATMEGA328), the development operation interface and environment are very simple and easy to understand, which is very suitable for beginners to learn.



Performance description

Digital I/O Digital input/output terminals are 0~13 in total.

Analog I/O Analog input/output terminals are 0~5 in total.

Support ISP download function.

Input voltage: No external power supply is required when connected to the computer USB, external power supply is 5V~9V DC voltage input.

Output voltage: 5V DC voltage output and 3.3V DC voltage output.

Using Atmel Atmega328 microcontroller

UNO R3 SMD-  parameter

USB power supply pressure: 5V

DC port supply voltage pressure: 7V-12V

Main controller model: SMD package ATMEGA328P

USB to serial chip model: chip package CH340

Digital I0 ports: 14 (6 of which can be used as PWM ports)

The external power supply is limited to a maximum current of 1A

10 ports limit high current 40mA

Analog input pins: 6 (2 of which can be used as I2C interface)

Flash memory capacity: 32KB (of which 2KB has been used as BootLoader space)



Clock frequency: 16MHZ

Size: length 75mm*width 53mm*height 12.5mm




1. Pin changes: Two I2C pins are added next to the AREF pin (SDA and SCL are just copies of Analog 4 and 5, not an additional I2C interface), in addition, two pins are added next to RESET, one is IOREF , Can make the expansion board adapt to the onboard voltage, this pin only tells the current onboard voltage of the expansion board (for example, UNO is 5V, which can be regarded as a copy of the power pin, and does not provide level pull-up), and the other is for the future Placeholder pins to be used.

2. More stable RESET circuit. The position of the RESET button has also changed, and it has been moved to the corner of the board close to the USB interface, making it easier to press.

3. ATmega16U2 replaces 8U2. This does not mean that R3 with 16K flash can make your code run faster. This update is for the USB interface chip. In theory, it allows UNO to simulate USB HID, such as MIDI/ Joystick/Keyboard.



For product details, instructions and instructions, software, please visit the official webpage of the product. All in one board Integration: UN with WiFi and R3 ATMEGA 328 esp8266 32MB of memory. All modules can work individually or together. And everyone has their own pin header. Convenient solutions to develop new projects, UN and WiFi. You can update and firmvare for atmega328 sketch and esp8266 via USB. This car has a USB serial converter ch340g. Using this board is very simple. Ancelotti's DIP switch board, connected module. For example, a USB interface: USB and atmega328, and esp8266, atmega328 and esp8266.

DIP switch table:



Based on ESP-8266EX

Arduino compatible, use Arduino IDE to program

11 x I/O pins

1 x ADC pin (input range 0-3.3V)

Support OTA wireless upload

Onboard 5V 1A switching power supply (maximum input voltage 24V)

After installing the hardware package, directly use the Arduino IDE to develop and operate like Arduino UNO

WiFi Arduino board


Uno R3 Official Box Atmega16u2 Uno+Wifi R3 Original Atmega328p Chip Ch340g For Arduino Uno R3 Development Board Wemos E

Shipping info

Shipments will deliver in 10 to 20 business days.

Learn more about our shipping rates here and our returns, refunds, and exchanges policy here.
Keywords & Tags