ESP8266 CH340 NodeMCU WiFi Module Lua V3 – 4MB Flash Development Board

The ESP8266 CH340 NodeMCU WiFi Module Lua V3 is an open-source development board designed for building connected electronics and IoT applications. Its ESP8266 controller provides WiFi connectivity while the onboard CH340G USB-to-UART bridge simplifies firmware uploading and serial debugging.

The board exposes multiple digital interfaces and GPIO pins, allowing it to communicate with sensors, displays, actuators, and other electronic modules. Its compact form factor makes it suitable for prototyping as well as embedded WiFi projects.

The 4MB flash memory provides additional storage for firmware and application resources, while the USB interface allows the board to be conveniently powered and programmed from a computer.

Features

• ESP8266-based WiFi development board.
• Integrated CH340G USB-to-UART converter.
• 4MB onboard SPI flash memory.
• 2.4GHz 802.11 b/g/n WiFi connectivity.
• Supports UART and GPIO communication.
• Supports common SPI, I2C and PWM applications.
• 10-bit ADC available through the A0 input.
• Compatible with Arduino IDE and suitable ESP8266 development environments.
• Supports WiFi Station, Access Point, and STA+AP modes through firmware.
• Supports OTA firmware-update projects.
• Compact NodeMCU V3 development-board format.
• Suitable for Lua-based and C/C++ development.

Applications

• Smart home automation.
• WiFi-enabled sensors and monitoring systems.
• IoT data acquisition.
• MQTT-based projects.
• Wireless environmental monitoring.
• Remote control and automation.
• Small web-server projects.
• Robotics and wireless robot control.
• Arduino/ESP8266 prototyping.
• University and engineering projects.
• Cloud-connected electronics.
• Remote data logging.

How to Use

1. Connect the NodeMCU board to a computer using a reliable Micro-USB data cable.
2. Install the appropriate CH340 USB driver if the board is not detected.
3. Select the appropriate ESP8266 board configuration in the Arduino IDE or your preferred development environment.
4. Select the correct COM port.
5. Write or upload your firmware.
6. Connect sensors and peripherals to the appropriate GPIO, power, and ground pins.
7. Ensure all connected devices use compatible voltage levels before powering the circuit.

Important Notes

• The ESP8266 uses 3.3V logic. Do not apply 5V directly to ESP8266 GPIO pins.
• Use a suitable logic-level converter when interfacing directly with 5V logic devices.
• The listed 4.5–9V input range should be applied through the board's appropriate power input; do not exceed the stated maximum input.
• USB power depends on the quality and capability of the USB cable and host/adapter.
• A poor-quality USB cable can cause unstable power, programming failures, or failure of the computer to recognize the board.
• Do not connect motors, relays, fans, or other high-current loads directly to GPIO pins.
• Use suitable transistor/MOSFET driver circuits, relay modules, or motor drivers for higher-current loads.
• The “Dual high-power H-bridge” specification sometimes appearing in generic listings does not describe the NodeMCU board itself; this is a microcontroller development board, not a dedicated H-bridge motor driver.
• The actual board component layout, USB connector, regulator, color, and physical appearance may vary depending on stock.
• Please allow approximately 5% measuring deviation due to manual measurement.
  

Documentations and How-To Guides

1. LastMinuteEngineers: Open-Source Project Ideas and Hardware Integrations for ESP8266
2. In-Depth Setup Guide: Configuring the Arduino IDE for NodeMCU V3 Flashing Loops
3. Step-by-Step Tutorial: Launching an Interactive HTML Web Server Using NodeMCU Firmware

Package Includes

• 1 × ESP8266 CH340 NodeMCU WiFi Module Lua V3 Development Board