MQTT Device connections... what are valid options

Configuration
1

I’m trying to setup a device via MQTT discovery, and part of the options for setting one up is a list of connections…
in the docs, it says:

connections list (Optional)
A list of connections of the device to the outside world as a list of tuples [connection_type, connection_identifier]. For example the MAC address of a network interface: “connections”: [[“mac”, “02:5b:26:a8:dc:12”]].

But, I cant find anywhere where it lists what the potential connection types are.
clearly “mac” is one, but is “ip_addr” (or “ipaddr”, or “ip”?) any others? if I have multiple mac addresses do I list them all?

I’m assuming that I’m just missing it, but I cant seem to find it and when I search, I get lots of references to MQTT connections (i.e. connections between clients and the MQTT server), but none pointing to this field.

Thanks!

2

It appears to be just asking for a list of tuples.
It would seem to me that means user defined as long as it’s a list of tuples.
What the docs don’t say is usually undefined.

3

What device?