Velux interface? Home Assistant has it

[smorgasbord]

New roof forced me to replace my Velux skylights, so now I have to deal with the new interfaces Velux supports. There appear to be two options:

1) Get an KLF 200 and use contact closure. At a discounted $225 for 5 things (skylight with shade is 2 things), that gets expensive quickly.

2) Support the io-homecontrol interface. This is apparently supported via Home Assistant, but I use eisy instead. Has anyone taken this up? I couldn't find in in Polyglot.

[IndyMike]

No experience with Velux or the interfaces.  However, a post on the HA forum indicates that the KLF 200 can handle far more than 5 devices.  I'd say clarification from the manufacturer would be in order:

VELUX America LLC 1-800-88-VELUX

https://community.home-assistant.io/t/how-to-control-io-homecontrol-velux-devices-blinds-somfy/88917/3

Please do post back with anything you learn.  Others will have the same questions.

[smorgasbord]

I did call Velux and luckily got the most knowledgable tech support person there, who begrudgingly sent me the KLF interface document (KLF API technical specification for klf 200 api-ver3-18.pdf).  I could upload that here, if anyone wants to take a look (warning: using it is not supported by Velux, so don't expect any help on it). It's got a mix of easy stuff like using the reset buttons, and then the Cat-5 connection for things, too.

My problem is that there are a limited number of "pockets" for holding keys in each skylight or blind, and there aren't enough pockets to have the simple remote that ships with the skylight AND the App Gateway AND the KLF200 contact driven Gateway. So, to use the KLF200 I have to reset the skylights and not use Velux's App anymore.

So, at this point my best solution might be to not use the KLF200 and instead use the Velux App and then connect that to Apple's HomeKit. If I do that, can I send/receive HomeKit messages to/from my EISY? Does that makes sense?