Arduino UNO + WiFi R3 ATmega328P + NodeMCU ESP8266 CH340G Compatible Board

The Arduino UNO + WiFi R3 ATmega328P + NodeMCU ESP8266 CH340G Compatible Board is a versatile all-in-one development board that combines the reliable ATmega328P microcontroller with the powerful ESP8266 WiFi module on a single PCB, providing an efficient solution for Internet of Things (IoT), wireless communication, embedded systems, robotics, home automation, and smart device development. The board integrates the Arduino UNO R3 architecture with the NodeMCU ESP8266, allowing users to leverage the strengths of both microcontrollers in a single compact platform. The ATmega328P operates at 16 MHz with 32 KB of Flash memory, 2 KB of SRAM, and 1 KB of EEPROM, making it ideal for real-time control, sensor interfacing, and peripheral management, while the ESP8266 provides built-in 2.4 GHz IEEE 802.11 b/g/n WiFi connectivity for cloud communication, web servers, remote monitoring, and IoT networking. Both controllers can operate independently or communicate with each other through a serial interface, enabling efficient task sharing between hardware control and wireless communication.

The board features 14 digital input/output pins, including 6 PWM outputs, 6 analog input channels, UART, SPI, and I2C communication interfaces, making it compatible with a wide variety of sensors, displays, motors, relays, communication modules, and expansion shields. An onboard CH340G USB-to-Serial converter provides reliable programming and serial communication with a computer, while integrated DIP switches allow users to easily select different operating modes, including programming the ATmega328P, programming the ESP8266, or enabling serial communication between both processors. The board supports USB power as well as external DC power input, with onboard voltage regulation ensuring stable operation across different applications. Fully compatible with the Arduino IDE, it can be programmed using the Arduino programming language and supports thousands of open-source libraries and examples for rapid application development.

The Arduino UNO + WiFi R3 Compatible Board is widely used in smart home automation, IoT devices, wireless sensor networks, environmental monitoring, industrial automation, robotics, smart agriculture, weather stations, wireless data logging, remote monitoring systems, security systems, energy management, cloud-connected applications, mobile app control, web-based automation, educational laboratories, engineering projects, and rapid prototyping. It supports seamless integration with popular IoT platforms such as MQTT, Blynk, ThingSpeak, Firebase, ESP8266 web servers, and cloud services while simultaneously handling sensor data acquisition and device control through the ATmega328P. Compatible with standard Arduino UNO shields and numerous electronic modules, this board provides an excellent balance of processing capability, wireless connectivity, ease of programming, and hardware compatibility, making it an ideal choice for students, hobbyists, makers, engineers, and professional developers building intelligent connected electronic systems.