Decent Espresso is a company based in Hong Kong, San Francisco and Seattle. They build espresso machines that are controled from touch-screen tablet. Users can control over temperature and pressure. Data are recorded along with parameters such as flow rate, ambient humidity, and the actual temperature in the grouphead (using a thermo probe). So custom results can be replicated.
The tablet software is developped with Tcl/Tk and Androwish with bluetooth (See here [L1 ]). There was an Offering TCL Jobs about this topics in october 2016.
To see the user interface, watch this Youtube video [L2 ] For technical details about Decent Expresso products see their Google+ page [L3 ]