
SKU Code
MCU0005
Availability
Categories
This is one of the most popular ESP8266 development boards. It has 4MB of flash memory, 11 GPIO pins, and one ADC pin with 10-bit resolution. This is what we use more often in our Wi-Fi and IoT projects. It is extremely versatile and perfect for beginners.
Nodemcu ESP8266 Pinout:
ESP8266 Nodemcu
For practical purposes ESP8266 NodeMCU V2 and V3 boards present identical pinouts. While working on the NodeMCU based projects we are interested in the following pins.
Most ESP8266 NodeMCU boards have one input voltage pin (Vin), three power pins (3.3v), four ground pins (GND), one analog pin (A0), and several digital pins (GPIO XX).
| Pin | Code | Arduino Alias |
|---|---|---|
| A0 | A0 | A0 |
| D0 | GPIO 16 | 16 |
| D1 | GPIO 5 | 5 |
| D2 | GPIO 4 | 4 |
| D3 | GPIO 0 | 0 |
| D4 | GPIO 2 | 2 |
| D5 | GPIO 14 | 14 |
| D6 | GPIO 12 | 12 |
| D7 | GPIO 13 | 13 |
| D8 | GPIO 15 | 15 |
| SD2 | GPIO 9 | 9 |
| SD3 | GPIO 10 | 10 |
| RX | GPIO 3 | 3 |
| TX | GPIO 1 | 1 |