Exploring the Uno Wifi R3: A Treat for IoT Enthusiasts

Uno+WiFi R3 (ATmega328P + ESP8266 8MB) with USB-TTL CH340G – Compatible with Arduino UNO

The Uno+WiFi R3 is an upgraded 2-in-1 development board that combines the ATmega328P microcontroller and the ESP8266 WiFi module (8MB memory) on a single board. It works just like a normal Arduino UNO but with built-in WiFi, making it perfect for IoT and smart-device projects.

Both chips (ATmega328P & ESP8266) can work together or individually, and each has its own pin headers. The board uses a CH340G USB-TTL converter, allowing you to upload code and firmware through a normal USB cable.

This board includes a DIP-switch that controls how the ATmega328P and ESP8266 communicate. You can switch between USB to ATmega, USB to ESP, or ATmega to ESP connection modes easily.

✔ Key Features

• 2-in-1 Board: ATmega328P + ESP8266 WiFi (8MB Flash)

• Built-in USB-TTL Converter (CH340G)

• Works like Arduino UNO with added WiFi

• Update ATmega or ESP8266 sketches via USB

• DIP switch for module communication control

• Digital I/O pins: 14

• Analog input pins: 6

• Operating Voltage: 5V

• USB Power: 5V (max 500mA)

• Logic Level: 5V

• Interface: Serial (UART)

• Wide temperature range: −40°C to +125°C

✔ DIP-Switch Modes

✔ Perfect For

• IoT Projects

• Smart Home Systems

• WiFi-based Robotics

• Sensor Monitoring

• Arduino Learning & Prototyping

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