NodeMCU ESP8266 V3 Lua WiFi Development Board (CH340)

The NodeMCU ESP8266 V3 Lua WiFi Development Board (CH340) is a compact and cost-effective WiFi module perfect for IoT applications. With built-in TCP/IP protocol stack, it can connect microcontrollers to WiFi networks seamlessly.

Key Features

• 802.11 b/g/n WiFi with integrated TCP/IP stack
• Low power consumption with deep sleep modes
• Multiple GPIO pins with PWM, I2C, SPI support
• Full Arduino IDE support with ESP8266 core
• Lua scripting support via NodeMCU firmware
• CH340 USB for programming and power
• 4MB flash memory for application storage

Technical Specifications

Applications

• IoT sensor nodes sending data to cloud
• WiFi-controlled relays and smart switches
• Home automation hubs and controllers
• Weather stations with wireless data upload
• Smart lighting with app/remote control
• Web servers for local device control

Pinout

• VIN: External power input (5V)
• 3.3V: Regulated 3.3V output
• GND: Ground pin
• GPIO0-GPIO16: General purpose I/O
• TX/RX: Serial communication
• A0: Analog input (0-3.3V max)

Important Notes

• All GPIO operate at 3.3V – do not connect 5V signals directly
• GPIO0 must be LOW during boot for programming mode
• Install ESP8266 board package in Arduino IDE
• Limited ADC (single channel) – use external ADC for multiple analog
• WiFi and ADC cannot operate simultaneously on some pins