Display non Craft CMS data with Twig I have a Craft CMS installation in which there will be other data imported into the db (via Cronjob). It's data from a Weatherstation which will be displayed without further editing in the Control Panel. 

Is it possible to display this data via Twig bypassing the Control Panel all-together?

something like:

{% for entry in special.db.section('xyz') %}
  {{ entry.value }}
{% endfor %}


My first thought would be to do this via the Element API Plugin and then use JavaScript to display this data. But maybe that's not necessary?
You can create a custom plugin to fetch the data. Pluginfactory.io is a good place to create your basic files/folders. Then you'll insert this function in your PluginVariable.

public function getData($table){
    return craft()-&gt;db-&gt;createCommand()
        -&gt;select('*')
        -&gt;from($table)
        -&gt;where('some Conditions)
        -&gt;queryAll();
}


and in your template 

{% for entry in craft.pluginName.getData('xyz') %}
    {{ entry.someField }}
{% endfor %}


Note: this only works when the table prefix is the same as your craft tables. So before your from($table) Craft will automatically include a $tablePrefix (usually craft_) you can either name your custom tables craft_ as well or change the prefix before your query 

$oldPrefix = craft()-&gt;db-&gt;tablePrefix;
craft()-&gt;db-&gt;tablePrefix = '';
// handle your queries
craft()-&gt;db-&gt;tablePrefix = $oldPrefix;