rudi wrote:i am sure, we will get the rest open from espressif, there are perhabs more 'injections' like this.
Nope, you can forget that. LWIP is open source to start with. It will probably even have a license, like GPL, that requires to supply the source if you use / adapt it. The other libraries have to do with hardware interaction and either the information or the code itself is proprietary / IP and/or NDA by Espressif and/or Cadence.