My problem is actually a same one with issue 63, however you closed that issue. When I connect the GPS receiver with BTstack it shows Fix: invalid and there is no gps signal available.

I have purchased a license of BTstack(1.4) and is working on an ipad （3.2.1 JBed）, and is using a Holux M1000 BT Gps receiver.

:) I closed the other one as the original poster got happy. Same answer again:

There's a minor changes of BTstack GPS not being able to parse the GPS data, but the more likely expectation is that your GPS receiver just doens't get a fix.

Please attach the file /tmp/hci_dump.pklg (scp or iFile from Cydia) after you had BTstack GPS running for 5 minutes at a place (e.g. balcony) where you expect GPS satellite reception.

I have a same problem: "Fix: invalid and there is no gps signal available". Mine is 3.2.1 JB, licensed BTstack 1.4, and Nokia LD-3W. I will send the required file afterwards.

Sorry! It's OK now after waiting 5 mins for it to find the satellite. A great software. Thank you!

lol. :) I'm going to close this issue now, too

Update: Signal found after about 5mins Thanks.