There is a C-Bus to ELK M1 interface being offered by Ness Security in Australia. Plans are to offer this C-Bus interface in the US soon.
That is indeed great news. I had suggested to ELK that they consider offering Ness's M1-CBUS interface and I'm glad to see it will happen.
I understand that when connected to Port 0 on the M1, the M1-CBUS interface provides the ability for C-Bus to poll the M1 for system status, the ability to control the M1 via C-Bus (though I'm not sure why you would want to do so) and the ability for the M1 to receive lighting status from the C-Bus. Are these the capabilities you expect to have available?
A final question: do you have a ballpark date for the offering?
Yes, when connected to port 0, the c-bus interface (V1) will receive C-bus commands/updates.
Why would you want to control the M1 via C-Bus - many reasons
My curtain has 12Vdc control. I use one switch in the room for lights and curtains.
In the garage, the door opener is connected to the M1 and I use a light switch to open the garage door via the M1.
The M1 can be armed via a c-bus switch
The list goes on.
The V1 interface loses this ability when used with a serial expander and can only send out c-bus commands. The problem is that the ethernet interface want to use port 0 as well, hence a conundrum.
The V2 interface that has recently been released resolves this issue by allowing both the Ethernet interface and C-bus interface to use the same port. The C-bus interface has two ports an in and out, where the Ethernet module is connected to.
Ness will hopefully be offering it to you US guys soon since C-bus has now been released there