Iam finishing up my wiring and would like to connect my autopilot servo wiring (GRT A/P servos) to my GRT EFIS sport EX. According to the wiring diagrams, I need a serial in and serial out for them to operate. My problem is that I dont have any available for this purpose. My question is can I splice into one of the 3 serial ports to supply the info to the servos, or do I have no other option than to purchase a serial port expander from GRT? The EFIS I purchased came with 3 serial ports, but I have them filled with the GRT EIS, Garmin 327 Xponder, and the Vertical Power electronic circuit breakers. After reading this, it would make sense to me that I would need to get the expander, but think Ill just check here to see if any of you have come across this issue, or have any other ideas.
Thanks for the help!
Thanks for the help!