Interconnected the R232 data lines between the GRT EFIS and the GRT EIS4000, the Garmin GTX-327 and SL-30, and the Matronics FuelScan. Spent a ton of time trying to get all of the protocals working. Still can't get the "GPS" feed to work going to the Garmin GTX-327. Using the "Autopilot (Aviation)" at 9600 baud from the GRT EFIS, I can get what looks like Lon information, but nothing else. I've emailed Garmin to find out what this input is really looking for. Why-o-why couldn't they just use the standard NEMA0183 output like everything else...?
