I have noob qestion: I own CH fighterstick grip which have like 17 wires for buttons and I need to reduce that a little.I will be buying arduino pro micro,is there any way how to wire buttons to have less wires going through or do I need something like shift registry board ?
The best to do is not change anything inside CH grip, because buttons/HAT are wired in matrix scheme with required diodes already installed.
What is need is connect the wires in Arduino and set the corresponding matrix in MMjoySetup.
You can do different, using Shift Register circuit, what need 5 wires for communication of grip whit controller o base, but this require replace the CH PCB under HAT (desolder, solder), with new created for this new wiring method, a complicated and laborious process. Anyway for this approach look in Rel4y upgrades in DCS forum: https://forums.eagle.ru/showthread.php?p=4310926#post4310926