Olimex ESP32-EVB Rev H DC power issue

[mitchellmerca]

Hello,
I'm having an issue with our Rev H board not booting up when powered via the DC jack. If powered over USB, they work fine, and also previous versions work.

Any ideas to get the Rev H boards working properly, other than power them via USB?

[LubOlimex]

Can you describe the problem in more detail? What code are you using? How did you determine it doesn't work? What does the box of the board say revision H or revision H1?

Revision H is pretty old hardware revision, we are currently manufacturing revision K1. Revision H was reported to have some start up problems that were fixed in revision H1 and then further fixed in revision I. Refer to the revision chagnes to see them:

https://github.com/OLIMEX/ESP32-EVB/tree/master/HARDWARE

Check if R24 is 470k - if only 470k is present, solder 1k/0603 size over the 470k as mentioned in the log, this would improve the startup behavior.