GPS slow to startup


#1

I take a device that has a GPS fix and walk inside where I have no GPS reception and reboot the device, when I go back outside to a clear sky it can take 30 minutes for the GPS chip to wake up and give me NEMA data.

How might my intermediate driver be misconfigured to make this happen?


#2

What device/GPS/Firmware versions are you using?


#3

The first device has a UMTS Sierra Wireless MC8355:3050 with firmware D3200-STSUGN-1676 1.
The second device has a CDMA Sierra Wireless MC5728V Rev 1.0 with firmware 1.33.01:58005 and ESN 60ea3b5a.
Both can take ~15 minutes to find GPS the second and additional times.


#4

The bug was caused by the wrong options to SetCommTimeouts(), the desktop version is different than the WinMobile.