Homegear + MAX + Keymatic + HM-CFG-USB possible?

English Forums Hardware
1

Hi,

I am currently running Homegear on a Raspberry Pi (using a CUL stick) and several MAX components.
Now I plan to add a Keymatic door lock.
I read that keymatic only works with original HM components because it requires an AES handshake.
So my question is: Is it possible to simply replace my CUL stick by a HM-CFG-USB stick adding support for AES while still being able to use my MAX-components?

Thx,

chris

2

Hey chris,

no, you need two physical interfaces: One for MAX! and one for HomeMatic. Using the CUL for both at the same time is not possible.

Cheers,

Sathya

3

Hi Sathya,

thx for the quick reply!

But at least I could use an additional HM-CFG-USB stick to get full access to the keymatic right?
Is it safe to do so? I read somewhere that the USB-stick has an issue with AES.
Is it safer to use a HM-CFG-LAN device instead?

Thx again.

chris

4

Hey chris,

Yes

Yes

We thought so, too, but it turns out, when you change the AES key, everything is alright.

Not safer. If it’s the better solution, I don’t know. I never extensively tested the HM-CFG-USB. On the Raspberry Pi the latency can in theory be quite high on hight CPU load, USB or network usage. But I don’t know, if that’s relevent in practice.

Cheers,

Sathya

5

OK - thanks a lot for the enlightment !!

Cheers, chris