Development of sketches and visual studio applications now under Visual Studio 2015 (was Visual Studio 2013). Just downloaded the software of visual studio and also the IDE for Arduino and Xamarin. No problems occured with the installation of the software. It seems that applications made under VS2013 are updated correctly and are working whitout problems. 

Next step in development is making the sketch with the wifi shield more stable and make a start with the development of android based applications, communicating via tcp/ip. Goal is making a standard monitor on an android cell Phone, just like the already made windows based monitor communicating via a serial connection.  Also one of the goals is increasing the scope of the windows based standard environment with the DA part of SCADA. Development will take place under VS 2015 for all platforms (so nice...).