songa wrote:thank you very much guys and sorry for the misunderstanding
Hehehe, yeah sometimes things can be confusing.
Here's a picture that will describe the separate elements (and their names):
Schematics and other info of the NodeMCU can be found here.
When you're new, don't start with a separate ESP (ESP-01 to ESP-14) module.
Get yourself a proper development board: NodeMCU - WeMos D1 - WeMos (UNO form factor) - Witty Board
ESP power requirements are 3.3V±10%@350mA
The ESP8266 IS NOT 5V tolerant on ANY pin (see item 5.14 on page 25 of the FAQ)