diff --git a/fhem/docs/commandref.html b/fhem/docs/commandref.html
index 019ddc7c8..9e332af5a 100644
--- a/fhem/docs/commandref.html
+++ b/fhem/docs/commandref.html
@@ -3019,7 +3019,8 @@ A line ending with \ will be concatenated with the next one, so long lines
 
     <code>&lt;id&gt;</code>
     <ul>
-      Corresponding to the <a href="#owfs_id">id</a> of the input device.
+      Corresponding to the <a href="#owfs_id">id</a> of the input device.<br>
+      Set &lt;id&gt; to <code>none</code>for demo mode.
     </ul>
     <code>&lt;interval&gt;</code>
     <ul>