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====== KVV plugin ======

{{:lcd4linux:ledmatrix-kvv.jpg}}

This plugin gives you access to the [[http://www.init-ka.de/webfgi/query.aspx|realtime train schedule]] 
of the [[http://www.kvv.de/kvv/|Karlsruher Verkehrsverbund]].

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===== Functions: =====

|kvv::line(n)|line of the n'th train to depart (max n == 7) |
|kvv::station(n)|station the n'th train will depart to|
|kvv::time(n)|time the n'th train will depart|
|kvv::time_str(n)|textual representation of departure time (--- if none)|

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===== Examples =====

<code>
Widget KVV0 {
    class 'Text'
    expression kvv::line(0).' '.kvv::station(0)
    width 11

    align 'L'
    update tick
    Foreground 'ffff00'
    style 'bold'
}

Widget KVV0TIME {
    class 'Text'
    expression kvv::time_str(0)
    width 2

    align 'R'
    update tick
    foreground kvv::time(0) < 2 ? 'FF0000' : ( kvv::time(0) < 5 ? 'FFFF00' : '00FF00' )
    style 'bold'
}

Layout Default {
    Row1 {
	Col1  'KVV0'
	Col12 'KVV0TIME'
    }
</code>

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===== Configuration =====

Configuration is quite simple. The most difficult part will be to obtain the
correct station id. To get it go to the 
[[http://www.init-ka.de/webfgi/query.aspx|realtime train schedule]], select your
favorite station and have a look at the resulting page source code. It will
contain a line like //stopId = "1898"//. This is the id you are searching
for.

The refresh rate is the time in seconds between two requests to the server.
The lower the value, the more likely the KVV will notice what we are doing
here (and will eventually shut down the service) the higher it is, the
greater the risk that the displayed schedule isn't up to date.

If the abbreviate option is set to 1, some simple translation mechanism is 
enabled. This is used to replace certain long text elements (e.g. Hauptbahnhof)
with its abbreviation (e.g. Hbf.). This is useful for displays with short lines
like the LEDMatrix.

Finally, if you live behind a proxy you can tell the system so.

<code>
Plugin KVV {
    StationID '12_701'
    Refresh 30
    Abbreviate 1

    Proxy 'igate'
    Port 8080;
}
</code>

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