NodeMCU V2
NodeMCU V2 is a widely used Wi-Fi development board built around the ESP8266 ESP-12E module with a Tensilica L106 32-bit RISC processor running at 80/160 MHz and 4 MB SPI flash. It integrates a CP2102 USB-to-serial chip for easy firmware flashing and serial debugging through a Micro-USB port. The board exposes 11 digital GPIO pins, one analog input, and supports UART, SPI, and I2C for connecting sensors and peripherals, with MQTT enabling straightforward IoT platform connectivity over Wi-Fi.
Overview
The NodeMCU V2 is a widely-used Wi-Fi development board based on Espressif’s ESP8266 ESP-12E module. It combines a built-in programmer (CP2102 USB-to-serial chip) with a breadboard-friendly layout, making it easy to flash firmware from the Arduino IDE and connect to ThingsBoard over MQTT without any additional hardware.
Key Features
- Single-core processor: Xtensa L106 @ 80/160 MHz
- Wireless: Wi-Fi 802.11 b/g/n (2.4 GHz)
- GPIO: 11 digital I/O pins (3.3V logic) and 1 analog input (A0, 0–3.2V)
- On-board programmer: CP2102 USB-to-serial, no external programmer needed
- Form factor: Breadboard-compatible, 30-pin layout
- On-board: Reset and flash buttons, built-in LED (GPIO2)
- Power: 5V via micro-USB; 3.3V onboard regulator
- SDK support: Arduino IDE, MicroPython, NodeMCU Lua firmware
Hardware Specifications
| Parameter | Value |
|---|---|
| Chip | ESP8266 (Espressif ESP-12E) |
| CPU | Xtensa L106, 80/160 MHz |
| Flash | 4 MB SPI Flash |
| RAM | ~80 KB usable SRAM |
| Wi-Fi | 802.11 b/g/n (2.4 GHz) |
| Digital I/O | 11 pins (3.3V logic) |
| Analog input | 1 pin (0–3.2V) |
| USB | Micro-USB (CP2102 USB-to-UART bridge) |
| Operating voltage | 3.3V (I/O) |
| Power supply | 5V via USB |
| Operating temperature | −40°C to +125°C |
Supported Use Cases
- Smart home: Wi-Fi-connected switches, sensors, and displays
- Environment monitoring: temperature, humidity, air quality
- Smart office and smart farming automation
- Energy monitoring and data logging
Device Technical Documentation
Download datasheets and manuals for the NodeMCU V2
NodeMCU V2 Product page NodeMCU V2 DatasheetAdd Your Device to the Community
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