Hi,
Yes you are right. When you drag the downloaded rtl8720_update_v2.uf2 file into the Arduino drive, it will reset the Wio Terminal and load the sketch that is needed to enable the serial communication between RTL8720 and SAMD51.
This serial communication is necessary because we cannot directly communicate with the RTL8720 on the Wio Terminal and therefore we use SAMD51 as a bridge to make that communication possible. So, once the rtl8720_update_v2.uf2 is loaded, the Wio Terminal will behave as if you normally would upload a code and execute using Arduino IDE.
To get out of the “Burn RTL8720 fw”, you simply need to reset the Wio Terminal by following these steps and then just upload any code into Wio Terminal using Arduino IDE, and that code will be executed.
Thank you for the suggestion! I will add this note to the wiki document.
Best Regards,
Lakshantha