eben bin ich über einen Beitrag gestolpert:
Vielleicht ist es für den einen oder anderen Interessant.there is a another KNX-IP stack for the ESP (and Linux) which also supports ETS-programming+configuration:
https://github.com/thelsing
Furthermore, there is small Windows tool which can generate an individual signed .knxprod product database file by using DLLs provided by ETS4 for your custom homebrew KNX-IP device. As it is correctly signed, it can be imported into the ETS project like any other file.
Gruß
René