iFly GPS Forum

So the input to my Android iFly is my Navworx ADSB. I would like to augment the data flow with AHRS data. I'm in software but I have worked with EEs before and I think I can integrate a relatively inexpensive AHRS board to any single board computer including Raspberry Pi. I just need to know what is the format iFly requires to report ADSB data along with AHRS data.

Devices like Dual's XGPS 190 from Dual have ADSB integrated with AHRS which iFly handles. I think I can use that format given Navworx ADSB-out coupled with an AHRS box I can build. I just need the Dual output format spec. It's not published anywhere.

Actually, I do have a copy of Stratux source code. I could see that like most ADSB products, Stratux follows the Garmin GDL90 format. But that's about all I pick up after one day of study. It's not exactly the most documented of apps. One make file is named ahrsgdl90 which sort of implies the 2007 GFL90 spec has been updated to include AHRS data. And that's all I really need. I need to see the new and improved GDL90 spec that includes AHRS roll, pitch and yaw data which is absent from the original spec.

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