Update README

README

@@ -23,3 +23,10 @@ Optional decimal point for numbers.
 - STOP
 - SET TEMP 20.0
 - SET DEWP 60.0
+
+### Web Interface Example
+
+There is a little example web interface you can check
+out in the opt/webgui directory. This simple php page
+demonstrates how you can create a custom interface for
+your drybox. For more info see the README file there.