Description
The NodeMCU V2 is the "standard" version of the NodeMCU family. Unlike the bulkier V0.9 (Version 1) or the wider V3 (Lolin) versions, the V2 is specifically designed to be slim enough to leave one row of pins accessible on each side of a standard breadboard.
It integrates the ESP8266 SoC, which includes a 32-bit CPU and a full TCP/IP stack for Wi-Fi connectivity. The board features a built-in CP2102 USB-to-UART bridge, allowing you to plug it directly into your computer via Micro-USB to flash firmware or debug code without needing external programmers.
Features
Built-in Wi-Fi: Supports 802.11 b/g/n protocols with an integrated PCB antenna.
Breadboard Compatible: Narrow form factor (0.9" pin spacing) makes it ideal for prototyping on standard breadboards.
On-board USB-TTL: Uses the reliable Silicon Labs CP2102 chip for high-speed serial communication and driver stability.
Dual Power Options: Can be powered via the Micro-USB port (5V) or the VIN pin (4.5V to 10V).
Multi-Protocol Support: Includes hardware support for UART, SPI, and I2C, plus PWM on nearly all GPIOs.
Interactive Programming: Supports the Lua scripting language for rapid, event-driven IoT prototyping.
Specifications
Microcontroller: Tensilica 32-bit RISC CPU Xtensa LX106
Module: ESP-12E (Enhanced version of ESP-12)
Operating Voltage: 3.3V (internal logic)
Input Voltage: 4.5V – 10V (VIN) or 5V (USB)
Clock Speed: 80 MHz (adjustable to 160 MHz)
Flash Memory: 4 MB
SRAM: 64 KB (Instruction) / 96 KB (Data)
Digital I/O (GPIO): 11 Pins
Analog Input (ADC): 1 Channel (0 – 3.3V range on-board)
Wi-Fi Modes: Station / SoftAP / SoftAP + Station
