In 2014 the esp8266 Arduino core was developed with WiFi library API using Client, Server, UDP class and other methods to be compatible with sketches written for the Arduino WiFi library. The esp32 ...

Each arduino board has own code, For the 1st arduino board load the 111-ip code. Once the code already uploaded into the board, check the serial monitor if the ip address is 111.111.111.111.

Some of the first steps toward working with Arduino is understanding how to write code for it. The good news is that it's made with beginners in mind.