[Question] MAC Address or Serial number possible?

[Tommatheussen]

Description

I was attempting to add unique IDs to the Home Assistant integration, which would allow configuration from the UI for the entities. The problem seems to be that multiple installations would conflict with their IDs. HA does not allow the use of IP addresses to set unique IDs.

I looked at the protocol, but it doesn't look like we can read the MAC address or serial number, do you know if this is perhaps readable from the ETHM-1 Plus module?

home-assistant/core#74699

What I Did

Paste the command(s) you ran and the output.
If there was a crash, please include the traceback here.

[c-soft]

This is the API description that I was using while developing the lib (attached).

Unfortunately I can't see MAC or any other proper ID over there.

The only thing that could maybe help somehow would be 0xEE command: read device name. But it needs some playing around: most likely if you change the name of your alarm, the result will be changed...

int-rs_op_int_2020-03-05_4f512412.pdf

[c-soft]

Thinking about it more, the only idea I have is just get "ID" in the configuration.yaml - as described in "last resort" section of docs.

[Tommatheussen]

Do you mean we could try to set a ID inside the configuration?
I also thought about migrating to use a config entry, then we could use that one to generate the ID.

[c-soft]

I haven't looked in HomeAssistant dev docs in detail, but quick look tells me that making change so the component accepts some form of "ID" in the configuration.yaml could do the trick. Its not perfect, but will get the job done I guess.
No changes in the library necessary, just HA tree.

[DanielTheCoder]

I think there should be a way to get the mac-address, it is shown in DLOADX.
Was not able to find the correct command via wireshark, I've created a ticket (Ticket ID: 325-58X5-GRN) at Satel asking how to get mac-address.

[pawelgarbacz]

Having an IP of Integra's ETHM you can resolve MAC address e.g. using this library "get-mac", can't you? Then it shouldn't be very difficult to generate unique IDs.

[DanielTheCoder]

get-mac should not be used by HA as described in the entity registry best practices here https://developers.home-assistant.io/docs/entity_registry_index/#example-acceptable-sources-for-a-unique-id

[pawelgarbacz]

Then another idea would be hash of IP+integration key - this should be guaranteed unique...

[DanielTheCoder]

got an answer for my ticket from satel, there is no support for getting the mac-address via the integration protocol, instead they mentioned to use arp command with -a to get the mac.
Not sure if this the way to go as it's like get-mac ...
Asked another question, if it's possible to get a unique id or serial number.
If this is also no option, we may have really to go with the last resort option as described in HA docs, keep you updated.

[DanielTheCoder]

update from my ticket, support talked to R&D.
They think about it, adding some kind of identification for one of the next firmware updates, but no eta given.