The issue with the EFIS available on Droids at this time is they should not or can not be used as a primary display since the speed and altitude are derived from GPS, not from movement through the air.Because 90%+ of the code and hardware already exists, and for a lot of us, is already in use. I believe that most of the code for the existing Stratux system already resides in the various android apps, and the Stratux software just supplies the data to the app. If you're starting from scratch, at least make both HDMI & WIFI output available.
Blain, no schematic at this time. It would simply be based on the Stratux hardware, add pressure sensors and output to HDMI as a primary and since the code for outputting to Wi-Fi is there, that is usable too.
The only mechanical work involved is the buffer/ controller for the sensors. I have worked with these plenty with Megasquirt engine controls but the Raspberry is new to me. I have assembled my Stratux which is as much as I know at this point.