I am trying to test the ESP32 library i installed my Arduino IDE.  Your lesson calls for using the WiFi scan example code.  I don’t have that example in my IDE.  I checked and it should be included in the Arduino Master library.  I downloaded the Arduino Master zip file from GitHub.  I tried to add it and IDE returned an error message “Specified folder/zip file does not contain a valid library”. Where can I get the Arudino Master library?  Thanks
 

Examples will be installed dependent on the board you install with the board manager. When you install a board it automatically installs all dependencies including the Espressif base for the ESP32.
 
AFAIK there is no universal library that would cover every Arduino board ever made. It would be impossible to maintain.

Hi.
Those examples are available as soon as you install your ESP32 board.
To be able to select the examples, make sure you have an ESP32 board selected in Tools>Board.
Regards,
Sara

After restarting Arduino IDE, then the examples show up.  Thanks.

After restarting Arduino IDE, then the examples show up.  Thanks.

Great!
I’ll mark this issue as resolved.
If you need further help, you just need to open a new question in our forum.
Regards,
Sara