SamyGO

Is the DM65E display / tv D or L series?

In the manual are codes but they seem to not work.

Found some code here but I do not understand what I need to generate the final request and get secret keys for AES decryption / encryption.

https://github.com/timelery/NewestSamsung-RemoteControl

https://github.com/timelery/SmartView2-Modified

PS: just got port 7676. Is there some encryption? Can someone check some codes? Maybe they were just wrong.

It's not D nor L nor any other letter, it's business class (probably J or K like hardware)
Here is clearly not the place to ask, better go to samsungdforum imho

Thanks for the link. But it seems you have to sign some NDA to join their forum. Also thei will close this forum by the end of November / beginning of December after a migration to their developers community.

I guess they would not give any information about the key for the encryption (see the github links and search fo Aes).

Hm, but Samsung has this "model name for it;

LH65DMEPLGC

So, is this L? I'm confused now.

Also in their public forums there is not much activity.

You have to sign "NDA" anyway, since installation of any widget will require their SDK crap afaik, therefore mandatory registration.
Definitely not "L" series (L is supposedly not yet out 2017 *commercial* models, if not "M"...), your screen is from business branch where these letters don't apply.
Best advice is to follow link I given. Nobody will tell better here, not the stuff we deal with, so no idea about "the key"...
Btw, I assume when you acquire a "business" model, you get business "service", no? How about bugging Samsung aftersale then?

No, no widget. I have to send control commands via Tcp directly. Seems there is also MDC and a port. But is this still unencrypted?

I think so