ESP8266 Development Board NodeMCU V3 - ESP-12E CH340G WiFi Micro-USB, Arduino IDE Ready IoT Microcontroller

The ESP8266 Development Board NodeMCU V3 is an all-in-one internet-of-things microcontroller solution designed for makers, hobbyists, and professional engineers alike. Centered around the powerful ESP-12E module, this development board combines wireless network capabilities with extensive general-purpose input-output pins. Whether you are building a smart home sensor network, setting up a remote weather station, or designing a complex robotics control hub, this board bridges the gap between physical hardware and cloud-based applications. With its on-board USB interface and voltage regulation, setting up a wireless web server or connecting to an MQTT broker has never been more straightforward.

At the heart of the board lies the ESP8266 system-on-chip, featuring an integrated Tensilica 32-bit RISC CPU operating at adjustable clock frequencies of 80 MHz or 160 MHz. The board includes onboard flash memory to store compiled firmware and web assets securely. Communication with a host computer is handled by the reliable CH340G USB-to-serial chip, which generally installs automatically on modern operating systems like Windows 10 and 11. Power is delivered via a standard Micro-USB port, stepping down through an AMS1117 regulator to supply stable 3.3V logic levels across all data pins. Please note that the digital pins operate at 3.3V logic; connecting 5V sensors directly without logic level shifting may damage the board. The V3 layout is slightly wider than standard narrow boards, measuring approximately 31 mm across, which leaves specific breadboard routing considerations for prototyping.

Microcontroller: ESP8266 32-bit RISC

Wireless Standard: WiFi 802.11 b/g/n

Frequency Range: 2.4 GHz

• 2.5 GHz

Operating Voltage: 3.3V logic, 5V via Micro-USB

Digital I/O Pins: 11 digital pins supporting PWM, I2C, and SPI

Analog Input: 1 channel (A0) with 0-3.3V input range

USB to Serial Chip: CH340G

Programming Interfaces: Arduino IDE, MicroPython, NodeMCU Lua

Internet of Things (IoT) sensor nodes and smart home automation devices

Wireless data logging and remote environmental monitoring stations

Web servers hosted directly on the microcontroller for local device control

MQTT client implementations for home automation systems like Home Assistant

DIY robotics and remote-controlled hardware projects via smartphone or web browser

Wearable tech prototypes and wireless sensor mesh networks

To begin programming, install the CH340 driver if your operating system does not recognize the serial port automatically. Add the ESP8266 board package URL to your Arduino IDE preferences, then select NodeMCU 1.0 (ESP-12E Module) from the board manager. Ensure your wiring respects the 3.3V logic limitation of all digital and analog pins. When mounting the V3 board on a standard 830-point breadboard, note that the wider footprint covers both central power rails, requiring careful pin placement or the use of dual breadboards for full access to adjacent holes.

1x ESP8266 Development Board NodeMCU V3