        <span class="code">[StdCalibrate]</span>
        section. This applies only to CC3000, FineOffsetUSB, Ultimeter, WS1,
        WS23xx, and WS28xx hardware.
    </p>
    
    <h3><span class="code">weewx.conf</span></h3>
    
    <p>
        A version 2.X <span class="code">weewx.conf</span> file is not
        compatible with Version 3.X. However, the upgrade process should
        automatically update the file. Nevertheless, the changes are
        documented below:
    </p>
    <table>
        <tr 