or the one that is interested to the WTimer library and its use they can give a look here
There are some simple video to show what the library can do .
WSystem is a complex project I'm producing , with Android bluetooth , a lot of sensors , BMP180 , RTC DS3231 , sdCard , digital input optoisolated , relays output card and more .
WTimer allow you to create and to use timer such as in automation world.You can also create a pulse and/or trigged pulse to send data over serial and else
Ciao
Walter