A-GPS Time Info error. | Telit Cinterion IoT Developer Community
November 4, 2019 - 10:19pm, 7112 views
Hi,
A product we've developed using Gemalto's PLS8-US module relies on A-GPS for faster time to first fix. Devices starting the GNSS engine in A-GNSS mode using the AT^SGPSC command have worked well until recently. For the last few days, every attempt to start devices in A-GNSS mode has resulted in the AT^SGPSC command's, "AssistDataError" parameter reporting"Time Info Error". Automatic time zone updates are not enabled and devices seem to have have been set correctly to GMT when this error occurs.
For example, with one test device at 6:52 PM, November 4, 2019 GMT, firmware correctly sends the AT^CCLK command to the PLS8-US module and the command is acknowledged:
AT+CCLK="19/11/04,18:53:18"
OK
However, the subsequent start up attempt in A-GPS mode still fails with an "AGPS: TIME INFO ERROR" result.
A previously developed device using the 3G only PHS8-US modem and essentially the same A_GPS startup sequence works properly without error.
Can you please tell me, why this might occur with LTE and not 3G and if this might be some odd daylight savings time issue or perhaps something else going wrong?
Thank you,
Ed Haslam
Integrated Tracking Technologies Inc.
Hi Bartłomiej,
We've received notice from a customer using our older PHS8 based trackers that GPS positions are being reported with a year 2000 date. I haven't had a chance to replicate this yet but it sounds like Qualcomm's xtra.bin file hosting may also be starting to fail as well as for the xtra2.bin files. I've tried to get some clarification from Qualcomm on my own, but they have an almost walled fortress around their tech support with inquiries only possible for certain topics and no phone access of any kind that I can find. This has got to be starting to affect a lot of devices. Have you heard anything further from your end on what might be going on?
Thank you,
Ed
Hello Ed,
Currently we still don't have any confirmation from Qualcomm.
Based on our own tests we consider these links as working:
- XTRA_SERVER_1= http://xtrapath4.izatcloud.net/xtra2.bin
- XTRA_SERVER_2= http://xtrapath5.izatcloud.net/xtra2.bin
- XTRA_SERVER_3= http://xtrapath6.izatcloud.net/xtra2.bin
Best regards,
Bartłomiej
Hi Bartłomiej,
Thanks very much for your help. We'll issue an OTA firmware update for our devices based on using those servers. Hopefully those URLs will be stable for a while.
All the best,
Ed
Hello Ed,
According to Qualcomm the following new links should be working with all devices (older and newer):
http://xtrapath4.izatcloud.net/xtra2.bin
http://xtrapath5.izatcloud.net/xtra2.bin
http://xtrapath6.izatcloud.net/xtra2.bin
In fact these are the links that I have sent you before.
Have you possibly had an opportunity to test all these links? Can you confirm that they are working for your modules?
Thank you in advace for the answer.
Best regards,
Bartłomiej