ESP8266 NodeMCU WiFi IoT Development Board CH340 CP2102 CH9102 USB Serial Module For Arduino ESP8266 Wireless WiFi Internet Of Things DIY Project

NodeMCU ESP8266 IoT WiFi Development Board

📌 Product Overview

This NodeMCU V3 IoT development board is built around ESP‑12E WiFi module with ESP8266 main WiFi chip. Two hardware versions are available, equipped with either CP2102 or CH340G USB‑to‑UART serial chip. It adopts NodeMCU open‑source firmware based on Lua language, offering high‑level encapsulated hardware APIs, supporting Arduino‑style quick development for IoT projects. ✅ Main Chip: ESP8266 (ESP‑12E) ✅ Flash: 25Q32 4MByte (32Mbit) ✅ RAM: 20 Kbytes, 150K bytes available user storage ✅ Serial Chip: CP2102 / CH340G (two versions for option) ✅ Interface: Micro‑USB for power supply and serial debug ✅ GPIO Resources: D1‑D10 multiplexed for GPIO, PWM, I2C, 1‑Wire; 1‑channel ADC analog input

📋 Product Specifications

Item	Parameter
Main Module	ESP‑12E
WiFi Chip	ESP8266
Flash Memory	4M (32Mbit)
RAM	20 Kbytes
Serial Chip	CP2102 / CH340G
Communication	WiFi 802.11 b/g/n
Power Supply	Micro‑USB 5V
Working Temperature	-40℃ ~ +85℃
Programming Language	Lua / Arduino C
Peripheral	GPIO, PWM, I2C, ADC, 1‑Wire

🚀 Core Features

1. Open‑source NodeMCU firmware, Node.js‑style network API, friendly for web developers.
2. Fully broken‑out common IO pins, convenient for prototype building and secondary development.
3. Micro‑USB interface, support power supply and one‑click firmware flashing.
4. Two serial chip variants, same performance with slight PCB appearance difference.
5. Low‑cost high‑performance solution for smart home, wireless sensor and IoT device development.

⚠ Important Usage Notice

Kind reminder: There are 2 versions of the V3 development board. One uses the CH340 serial chip, and the other uses the CP2102 serial chip. The size is different, but the performance is the same. Please refer to our main image before purchasing. Kind reminder: If there are version differences or images not been updated, please refer to the actual product.

• CH340 version requires corresponding CH340 driver installation on Windows system.
• Before firmware flashing, confirm your serial chip model to pick correct driver and flashing tool.

🛠 Typical Application Scenarios

• WiFi IoT prototype development
• Smart home control unit
• Wireless data acquisition sensor node
• Arduino‑compatible DIY electronic projects
• Lua language embedded learning