My esp32 doesn't connect to wifi when connected to an external power supply + is my stepup fried?

[StefanL38]

What voltage do you measure between a GND pin and the 3.3V pin ?
Adding this picture makes everything very clear

Make experienced users help: two ways to quickly post code as a code-section

Hi newcomer, This thread wants to show you how you can speed-up getting helpful answers with small effort. If you manage at least to post this way. You have the sympathy of the experienced users. If you are willing to invest another 20 minutes these 20 minutes extra-time will save you a minimum of 200 minutes to finish your project. always post your full sketch. As a code-section from the very first to the very last line A code-section has a small height => keeps your posting "short" but e…