What is the license

[rengels]

I just noticed: there is no information about the License.

I think there should be some License.txt file somewhere. Possibly MIT or GPL. Maybe even LGPL (because, why not).
Right now, it is a little bit fuzzy, if we are even allowed to do any changes.

[JohnEdwa]

Without a license file the owner has full copyright of the code - all rights reserved - and anyone who wants to use it in any way has to get explicit permission from the creator.

[rengels]

Of course you are right.
But that would mean that I am running legal risks by just compiling the source code and flashing it on my esp32.

I think you understand my issue. We need a clearly stated license, possibly an open source license like MIT or GPL.