This short post is a
cheat sheet than you can use to check the
ESP8266 NodeMCU
pinout (V2 and V3 ESP8266 NodeMCU boards) for your
Arduino IDE programs.,For practical purposes
ESP8266 NodeMCU V2 and
V3 boards present
identical pinouts. For our mechatronics projects we are mainly 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).,These are affiliate links. This means if you click on the links and purchase the promoted item, we will receive a small affiliate commission at no extra cost to you, the price of the product is the same. We would really appreciate your support to our work and website if this is fine for you.