eewx.wxengine.StdRESTful, weewx.wxengine.StdReport</pre>
    
    <h2>From V2.2 or earlier</h2>
    
    <p>The signature of the function "<span class="code">loader</span>", used
        to return an instance of the station device driver, has changed
        slightly. It has changed from</p>
    
    <pre class="tty">loader(config_dict)</pre>
    
    <p>to</p>
    
    <pre class="tty">loader(config_dict, engine)</pre>
    
    <p>That is, a second parameter, <span class="code">engine</span>, has been
    