To display more sensors on the main page I have added the following lines:
<tbody>
$station_obs_html
<tr>
<td class='station-observations-label'>$obs.label.dewpoint</td>
<td>
<span class="outHumidity">$current.dewpoint</span><!-- AJAX -->
</td>
</tr>
#if $day.soilMoist1.has_data
<tr>
<td class='station-observations-label'>Bodenfeuchte</td>
<td>
<span class="radiation">$current.soilMoist1</span><!-- AJAX -->
</td>
</tr>
#end if
</tbody>