[hdpowerview] Repeater usage information

[jlaur]

#12061 introduced support for repeaters.

For a week one of my shades did not react to automations. I finally found out that a family member had turned off the repeater by accident.

Unfortunately the Hub does not report if repeaters are reachable, so it is not possible to create a rule simply detecting status change to OFFLINE.

However, survey data is available. Example:

Request URL: http://powerview/api/shades/36137?survey=true

{
    "shade_id": 36137,
    "survey": [
        {
            "neighbor_id": 17805,
            "rssi": -81
        }
    ]
}

This indicates that shade 36137 is connected through repeater 17805. This could be exposed as a Switch channel for shade things. This way it would be possible to detect if a specific shade is connected through a repeater. However, we also need to be aware that response from time to time will be:

{
    "shade_id": 36137,
    "survey": []
}

this could be mapped to UNDEF.

A rule could then detect if channel has been != ON for a certain amount of time.

Shade not connected through a repeater:

{
    "shade_id": 46532,
    "survey": [
        {
            "neighbor_id": 0,
            "rssi": -64
        }
    ]
}

Also seen:

{
    "shade_id": 58120,
    "survey": [
        {
            "neighbor_id": 17805,
            "rssi": -89
        },
        {
            "neighbor_id": 0,
            "rssi": -71
        }
    ]
}

Not sure what this means, but at least is has connection to repeater, even if this is not used. Probably it will use the "neighbor" with highest RSSI.

Additionally a new RSSI channel should be introduced.