NodeMCU V3 ESP8266 WiFi Development Board — CH340, Lua/Arduino IDE, PCB Antenna, IoT

NodeMCU V3 ESP8266 WiFi Development Board — CH340, Lua/Arduino IDE, PCB Antenna

The NodeMCU V3 is the most popular ESP8266-based development board — combining the ESP-12E/F WiFi module with a CH340 USB-to-serial chip, 3.3V regulator, and breadboard-friendly pin layout. Programmable in Lua (NodeMCU firmware), MicroPython, or Arduino IDE (with ESP8266 board package). Supports AP, STA, and AP+STA WiFi modes, LWIP TCP/IP stack, and FreeRTOS for multitasking IoT applications.

Hardware Specifications

• WiFi Module: ESP-12E or ESP-12F (ESP8266EX)
• CPU: Xtensa L106 @ 80/160MHz
• Flash: 4MB
• SRAM: 64KB instruction / 96KB data
• GPIO: 11 digital I/O pins
• ADC: 1 × 10-bit (0–3.3V)
• USB Chip: CH340G
• Antenna: PCB trace antenna (on-board)
• WiFi: 802.11 b/g/n (2.4GHz)
• WiFi Modes: AP / STA / AP+STA

Programming Options

• Arduino IDE: Install ESP8266 board package — familiar C++ environment
• Lua (NodeMCU): Event-driven, Node.js-style API — for rapid IoT prototyping
• MicroPython: Python 3 subset — for Python developers
• AT Commands: Use as WiFi modem via UART from another MCU

NodeMCU V3 vs V2 vs D1 Mini

• NodeMCU V3 (this board): Wider PCB (fits breadboard with 1 row free each side), CH340 USB — most common version
• NodeMCU V2: Narrower PCB, CP2102 USB — slightly more compact
• D1 Mini: Much smaller, fewer pins exposed — for space-constrained projects

Typical Applications

• Home automation (MQTT, ESPHome, Tasmota)
• WiFi sensor node (temperature, humidity, air quality)
• Web server and REST API endpoint
• OTA-updatable IoT device
• WiFi-controlled LED strip (WLED)

NodeMCU V3 ESP8266 board — CH340, 4MB flash, Lua/Arduino IDE, PCB antenna, AP/STA/AP+STA for IoT, home automation, and wireless sensor projects.

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