Please search for existing (open and closed) issues first to avoid duplicates.
Also, have a look at the Wiki.
Please put error messages and codeinside these 3 quotes/grave accents
(Delete this text when you've read it)
Code Gets Compile And Upload But Showing Error Message Of Serial Port Not Selected And Also The The Wifi Created by Esp8266 Can't Connect To Server Of By Default Gateway 192.168.4.1

Most helpful comment