Uno WiFi R3 Atmega328p NodeMCU ESP8266 8mb Memory USB TTL CH340G Compatible for Arduino UNO

Uno WiFi R3 Atmega328p NodeMCU ESP8266 8mb Memory USB TTL CH340G Compatible for Arduino UNO

The UNO WiFi R3 is an enhanced version of the classic Arduino Uno, combining the reliable ATmega328P microcontroller with the powerful ESP8266 WiFi module (8MB flash memory) — all on a single board. This integration allows you to easily create IoT (Internet of Things) and network-connected projects without the need for external WiFi shields or additional wiring.

Equipped with the CH340G USB-to-Serial interface, the board provides stable USB communication and easy programming via the Arduino IDE. The UNO WiFi R3 offers full compatibility with standard Arduino sketches while enabling wireless control, monitoring, and data exchange through WiFi — making it a versatile and cost-effective choice for modern IoT applications.

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Features

• Dual Microcontroller Integration:
• ATmega328P for general I/O and logic control
• ESP8266 for WiFi connectivity and IoT networking
• CH340G USB-to-Serial converter for reliable USB communication
• 8MB Flash memory (ESP8266) for web servers or OTA updates
• Selectable operation modes (MCU / ESP8266 / both) via onboard DIP switches
• Fully compatible with Arduino IDE and NodeMCU firmware
• Supports UART, SPI, I²C, PWM, and analog inputs
• Plug-and-play USB interface – no external programmer required

Applications

• IoT (Internet of Things) Development
• Home and Industrial Automation
• Smart Lighting and Energy Monitoring
• Wireless Sensor Networks
• Web-based Control and Monitoring Systems
• Cloud Data Logging (via MQTT, HTTP, or Blynk)
• Educational and Research Prototyping