     }
   });
 
-  server.serveStatic( "/", fs, "/" );
+  server.serveStatic( "/", SPIFFS, "/" );
 
   server.onNotFound( []( AsyncWebServerRequest * request )
   {


    else if ( request->hasArg( "channelnames" ) )
    {
      response = request->beginResponseStream( HTML_HEADER );
      for ( uint8_t channelNumber = 0; channelNumber < NUMBER_OF_CHANNELS; channelNumber++ )
      {
        response->printf( "%s\n", channel[channelNumber].name );

    {
      if ( !xOledTaskHandle )
      {
        return request->send( 501, HEADER_HTML, NOT_PRESENT_ERROR_501 );
      }
      response = request->beginResponseStream( HEADER_HTML );
      response->printf( "%i", oledContrast );
      return request->send( response );
    }
