ESP8266 CH340 NodeMCU Wi-Fi Module Lua V3

ESP8266 CH340 NodeMCU WiFi Module Lua V3 – Description

The ESP8266 CH340 NodeMCU WiFi Module Lua V3 is a powerful and versatile WiFi-enabled development board designed for IoT, smart devices, automation, and embedded system projects. Built around the ESP8266 SoC, this board integrates a microcontroller, WiFi networking, USB-to-serial interface, and power management into a single compact module.

With native WiFi support and easy programming through Arduino IDE or Lua, the NodeMCU V3 is widely used by students, hobbyists, educators, and professional developers.

Microcontroller & Wireless Core

The board is powered by the ESP8266EX, a highly integrated SoC that combines processing and wireless networking.

• Microcontroller: ESP8266EX

• CPU Architecture: 32-bit Tensilica L106

• Clock Speed: 80 MHz (up to 160 MHz)

• WiFi Standard: IEEE 802.11 b/g/n

• Frequency Band: 2.4 GHz

This enables reliable wireless communication for IoT and cloud-connected applications.

USB Interface (CH340)

The CH340 USB-to-Serial converter allows easy programming and communication with a computer.

• Plug-and-play USB interface

• Compatible with Windows, Linux, and macOS (driver required)

• Supports fast firmware uploading and serial monitoring

Memory

• Flash Memory: 4MB (typical)

• SRAM: 64 KB instruction + 96 KB data

This memory capacity is sufficient for running IoT firmware, web servers, sensor logic, and communication protocols.

Input / Output Pins

The NodeMCU V3 offers multiple GPIO pins for interfacing with external components:

• Digital I/O Pins: Up to 11

• Analog Input: 1 × ADC (10-bit)

• PWM Support: Yes

• UART, SPI, I²C: Supported

All pins are broken out and clearly labeled for ease of use.

Power Supply

• Operating Voltage: 3.3V

• Power Input:

  • USB

  • Vin pin

On-board voltage regulation ensures stable power delivery to the ESP8266 and peripherals.

Programming & Software Support

The ESP8266 NodeMCU V3 supports multiple development environments:

• Arduino IDE (C/C++)

• Lua scripting (NodeMCU firmware)

• PlatformIO

It supports a wide range of libraries for networking, sensors, displays, cloud services, and protocols such as HTTP, MQTT, TCP/IP.

Compact & Breadboard-Friendly Design

• Breadboard-compatible pin layout

• Compact PCB size

• On-board reset and flash buttons

• Integrated PCB antenna

This makes it ideal for rapid prototyping and permanent embedded installations.

Typical Applications

• IoT and smart home systems

• Wireless sensor networks

• Home automation

• Web server & cloud projects

• Robotics and automation

• Data logging and monitoring

• Educational and training projects

Summary

The ESP8266 CH340 NodeMCU WiFi Module Lua V3 is a reliable, low-cost, and powerful development board that brings WiFi connectivity and microcontroller control together in one platform. With strong community support, flexible programming options, and excellent performance, it is an ideal choice for IoT development, learning, and professional embedded applications.