[velbus] For examples to be fully-featured they should demonstrate use of Thing properties

[nagisa]

See the TODO reference to this issue in the velbus module’s README.

In short, there’s an example that reads along the lines of

Bridge velbus:bridge:1 [ port="COM1" ] {
    vmb2ble     01
    ...
}

however the specific modules can also accept various properties (such as those specifying subaddresses.) The example should ideally demonstrate specification of these properties.