What steps will reproduce the problem? 1. Using BTStack with the QSTARZ BT-Q818XT 2. Start GPS and change to a core-location-using app that shows track (ForeFlight Mobile) 3. Track value is missing when track value is 270-360 degrees

What is the expected output? What do you see instead? Expect a proper value between 270-360 as is seen correctly for other track values. No track/course value provided in Corelocation update events when moving in that block of directions. Works fine for 1 - 269 degree tracks though.

What version of the product are you using? On what operating system? Version: latest in Cydia as of yesterday, 8/8/10 - iPad OS 3.2.1

Please provide any additional information below.

thanks for reporting this rather specific bug. As I don't have a plane to verify, I've reviewed the code and even found the problem within half an hour. Stupid mistage: BTstack GPS was reporting headings from 270 to 0 degrees with negative values as -90 to 0, which is defined as invalid. I'll provide an update to BTstack GPS within the next week.

Great, thanks for fixing it! I've been very impressed with BTStack GPS!

Can you also check that the course value is not 0 when "unknown"? Looks like it might be giving a 0 in that case instead of a negative number to indicate "unknown".

good point. will set course to -1 if not moving. working on the GPS update right now, but got lost in some annoying bugs in the common BTstack that need to get fixed, too.

Awesome, thanks!