The ESP8266 NodeMCU CH340 is a WiFi-enabled microcontroller development board designed for IoT, automation, and embedded networking projects. Based on the ESP8266 SoC, it integrates a powerful 32-bit MCU with built-in WiFi, making it ideal for wireless control, data logging, and cloud-connected applications. The onboard CH340 USB-to-Serial converter ensures reliable programming and communication with computers.
Core Board Specifications
• Microcontroller: ESP8266 (ESP-12E / ESP-12F module)
• CPU Architecture: 32-bit Tensilica L106
• Clock Speed: 80 MHz (up to 160 MHz)
• Wireless Standard: IEEE 802.11 b/g/n WiFi
Electrical & Interface
• Operating Voltage: 3.3 V
• Input Voltage: 4.5–10 V (via VIN or USB)
• USB Interface: CH340 USB-to-Serial converter
• Digital I/O Pins: 11 GPIOs
• Analog Input: 1 × ADC (10-bit, 0–1 V range)
• Communication Interfaces: UART, I²C (software), SPI
• Programming Interface: USB (Arduino IDE / Lua / MicroPython)
Performance Characteristics
• Integrated TCP/IP stack for direct internet connectivity
• Fast boot and responsive WiFi performance
• Supports deep sleep for low-power applications
• Stable operation for continuous IoT use
Physical Characteristics
• Board Type: NodeMCU development board
• USB Connector: Micro-USB
• Form Factor: Breadboard-friendly
• Onboard Reset and Flash buttons
Compatibility
• Arduino IDE
• Lua (NodeMCU firmware)
• MicroPython
• Cloud platforms and IoT dashboards
• Sensors, relays, displays, and communication modules
Key Advantages
• Built-in WiFi with full TCP/IP support
• Easy USB programming using CH340
• Large community and library ecosystem
• Ideal for rapid IoT prototyping
Technical Insights
• GPIO pins are 3.3 V logic only (not 5 V tolerant)
• ADC input range limited to 0–1 V (use divider if needed)
• CH340 driver installation required on some systems
• Boot mode handled automatically for most uploads
Applications
• IoT and smart home devices
• Wireless sensor networks
• Web server and REST API projects
• Home automation and control systems
• DIY WiFi-enabled electronics
Pro Tip
• Install CH340 drivers before first use
• Use stable 5 V USB power for WiFi reliability
• Avoid loading GPIOs used during boot
• Use deep sleep mode for battery-powered designs
Package Includes
• 1 × ESP8266 NodeMCU CH340 Development Board