This is one of the Chinese boards that come with no documentation when you buy them from Amazon or Ebay. So to get it up and running in Arduino IDE, you need to download the supporting files for it. To do that, read the help here:
Go to File>Preferences:
Now click the highlighted button for Additional Boards Manager URLs:
Add the following address in the dialogue box that opens. If you already have other addresses there, enter it on a new line. All addresses need to be on a new line of their own.
URL for espressif boards that don’t come as default with the Arduino IDE
Now go to Tools>Board:… >Boards Manager ….
In Boards Manager type esp32 which will bring up the esp32 package, click Install (internet will be needed):
Once the package is installed, Close the Boards Manager:
Finally go to Tools>Board:…>ESP32 Arduino> and select the board you have:
Now connect your board through USB to your computer. Windows should automatically install some drivers and then you can pick the new COM port that appears from Tools>Port>COMx
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