NodeMCU V1 ESP8266 Development Board
BreadboardFriendly WiFi IoT Module for Arduino and Lua
The NodeMCU V1 is a popular, lowcost development board based on the ESP8266 WiFi SoC, designed for fast and flexible IoT prototyping [citation:4][citation:6]. It features an onboard USBtoserial converter and a breadboard-friendly layout [citation:1][citation:4].
ESP8266 WiFi SoC 80/160MHz 32bit RISC CPU with integrated 2.4GHz WiFi [citation:2][citation:9]
BreadboardFriendly Design DIP-style pins with Micro USB port for easy programming and power [citation:1][citation:4]
Input voltage via Micro USB is 5V. Operating voltage is 3.3V, regulated onboard [citation:2][citation:11]
In Arduino IDE, select the NodeMCU 1.0 (ESP-12E Module) board after installing the ESP8266 core [citation:1]
I/O pins are NOT 5V tolerant - applying 5V to GPIO will damage the board [citation:11]
Technical Specifications
| Parameter | Value |
|---|
| Wi-Fi SoC | ESP8266 (ESP-12E module) [citation:1][citation:7] |
| CPU Core | Tensilica Xtensa LX106 [citation:2][citation:6] |
| Clock Speed | 80MHz (configurable to 160MHz) [citation:9][citation:3] |
| Flash Memory | 4MB [citation:2][citation:8] |
| SRAM | ~64KB available [citation:2] |
| Operating Voltage | 3.3V [citation:2] |
| Digital I/O Pins | 11 usable GPIO (varies) [citation:9][citation:12] |
| Analog Input Pins | 1 (10bit ADC, 03.3V) [citation:2][citation:9] |
| USBtoSerial Chip | CH340G or CP2102 [citation:8][citation:12] |
| USB Connector | Micro-USB [citation:4][citation:8] |
= Key Features =
Integrated WiFi 802.11 b/g/n Works in STA, AP, and STAAP modes for versatile IoT applications [citation:8]
+Onboard CH340G USBtoSerial - Direct USB programming and power, no external programmer needed [citation:8]
OpenSource Firmware Supports Lua, Arduino C+, and MicroPython [citation:6]
+Multiple Peripherals UART, SPI, I2C, PWM, and OneWire on available GPIO pins [citation:2][citation:8]
+Reset and Flash Buttons - Onboard buttons for easy mode selection and reset [citation:4]
= Applications =
- Smart home automation and IoT sensors
- Wi-Fi remote control and monitoring devices
- Home automation projects and web servers [citation:1]
- Educational electronics and prototyping
Most Popular ESP8266 Board Industrystandard board with massive community support
Huge Ecosystem - Thousands of libraries, examples, and compatible projects available
√ Micro USB port for programming and power, no soldering required
√ Plenty of GPIO broken out for adding sensors and actuators
√ Supports Arduino IDE, ESP-IDF, NodeMCU Lua, and MicroPython [citation:1][citation:6]
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