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NodeMCU V2 ESP8266 Development Board
The NodeMCU V2 is a Wi-Fi development board based on the ESP8266 (ESP-12E module) with an on-board PCB antenna and USB programming interface. It supports 802...
The NodeMCU V2 is a Wi-Fi development board based on the ESP8266 (ESP-12E module) with an on-board PCB antenna and USB programming interface. It supports 802.11 b/g/n wireless networking and can operate in STA, AP, or STA+AP modes with a built-in TCP/IP stack supporting up to 5 simultaneous TCP client connections.
Program in Lua, Arduino IDE, MicroPython, or other ESP8266-compatible environments. The board supports over-the-air (OTA) firmware updates and features multiple GPIO pins with PWM and I2C capability.
Key Features
- ESP8266 Wi-Fi – 802.11 b/g/n, STA/AP/STA+AP modes
- USB Programming – Built-in USB-to-serial interface for easy flashing and debugging
- GPIO Pins – D0–D8, SD1–SD3 with PWM and I2C support (15 mA drive)
- 1-Channel ADC – Analogue input on A0
- OTA Updates – Remote firmware upgrades over Wi-Fi
- Built-In TCP/IP Stack – Up to 5 simultaneous TCP connections
Specifications
- Module – ESP-12E (ESP8266)
- Wi-Fi – 802.11 b/g/n
- Power Input – 4.5–9 V or USB powered
- Operating Current – ~70 mA typical, 200 mA max (transmitting)
- Standby Current – <200 µA
- Baud Rate – 110–460800 bps
- Operating Temperature – −40°C to +125°C
- Weight – ~7 g
Package Contents
- 1× NodeMCU V2 ESP8266 development board
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- ADC
- An analogue-to-digital converter reads a changing voltage and turns it into a number the microcontroller can use. It matters when connecting analogue sensors such as light, sound, or variable-resistor sensors.
- baud
- Baud is the signalling rate of a serial connection, often used as the speed setting for UART communication. Matching the baud rate matters because both connected devices must use the same setting for readable data.
- GPIO
- General-purpose input/output pins are microcontroller pins you can set in software to read signals, switch devices on and off, or connect to peripherals. The number of GPIO pins matters because it limits how many buttons, LEDs, sensors, and other parts you can wire directly to the board.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- IDE
- Short for Integrated Development Environment, a program used to write, run and manage code. It matters because some learners prefer a traditional coding workspace instead of a guided notebook-style lesson.
- MicroPython
- A version of the Python programming language made to run on microcontrollers. It matters because it lets beginners write readable code to control LEDs, sensors, motors and displays without needing to start with lower-level languages.
- OTA
- OTA means over-the-air updating, where firmware is updated wirelessly instead of through a programming cable. It matters because you may be able to update or maintain the module after it is installed in a project.
- PCB antenna
- A PCB antenna is an antenna pattern built directly into the circuit board rather than a separate metal antenna. It matters because placement, nearby metal and enclosure design can affect wireless range.
- PWM
- Pulse Width Modulation is a way for a digital pin to simulate variable output power by switching on and off very quickly. It matters for controlling things like LED brightness, motor speed, or servo-style signals from a microcontroller pin.
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