Forgot they discontinued the SHAC. It’s been replaced with a new model - Clipsal C-Bus Spacelogic Application controller… Who in marketing thought that was a good idea for a name?
https://www.clipsal.com/products/detail?CatNo=5500AC2&itemno=5500AC2&tab-document-1=0
Basically it’s a single board computer with built in C-Bus control and LUA scripting language.
The LUA script has MQTT built-in so Home assistant to talk to C-Bus only requires a couple of basic scripts. One has been done by ssaunders that even works with Home Assistant discovery.
As for the docker container, its been years since I used it so going off rough memory here. The 5500CN will need a static IP address - that can be done in your router (bind IP to MAC) or I think using the Lantronix Device Installer. Clipsal application note for using the device installer below.
https://updates.clipsal.com/ClipsalSoftwareDownload/mainsite/cis/technical/AN06-044-2.pdf
Once you have the docker container working and C-Bus is publishing topics to MQTT, you will need to add each light to your Home Assistant MQTT yaml file.
light:
############################# C-Bus Lights ############################
- name: Front Exterior
command_topic: "cbus/write/254/56/0/switch"
state_topic: "cbus/read/254/56/0/state"
payload_on: "ON"
payload_off: "OFF"
Hope that helps gets you started Jon.