ESP8266 Node MCU Type C

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.

• Microcontroller: Tensilica 32-bit RISC CPU Xtensa LX106
• Operating Voltage: 3.3V
• Input Voltage: 7-12V
• Digital I/O Pins (DIO): 16
• Analog Input Pins (ADC): 1
• UARTs: 1
• SPIs: 1
• I2Cs: 1
• Flash Memory: 4 MB
• SRAM: 64 KB
• Clock Speed: 80 MHz
• USB-TTL based on CP2102 is included onboard, Enabling Plug n Play
• PCB Antenna

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.

• Power pins (3.3 V).
• Ground pins (GND).
• Analog pins (A0).
• Digital pins (D0 – D8, SD2, SD3, RX, and TX – GPIO XX)

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).