The next SimVimCockpit version will have “embedded FMS/CDU” configuration for SimVimMatrix.
Now, you won’t need to assign all those 140 buttons one-by-one, you’ll just need to select one device (Boeing CDU or Airbus MCDU) in the configurator.
Here is the matrix wiring diagram for two CDUs (Boeing style and Airbus style). The 16 blue columns are the multiplexer inputs and the 12 green rows are the digital pins on Arduino Nano/Uno board:
Airbus style MCDU matrix wiring is the same, except for 3 additional buttons. Note the yellow line from the Y12 column and green branch from the D6 row and additional “brightness” buttons on the Y15 column:
See How to Connect SimVImMatrix here: https://simvim.com/svc_matrix.html
Also, the “standalone” SimVimPanel MCDU for Raspberry or any “stick-PC” or mini-PC will be released soon.
You can use either small LCD screens for a single left /right CDU or a wide LCD screen for both CDUs.
Look here for updates: https://simvim.com/sv_panels.html