The ESP8266 Wifi module is a complete Wi­Fi network where you can easily connect as a serving Wi- Fi adapter, wireless internet access interface to any microcontroller­ based design on its simple ...

Using an Arduino UNO WIFI R2 with Aduino IDE 1.8.13 and MySQL_Connector_Arduino V1.2.0 I was not able to compile the sketch "connect_wifi" or even compile "connect" with an Ethernet2 shield attached ...