Skip PGPS expire checking?

RE: Skip PGPS expire checking?

Øyvind — Mon, 30 Sep 2024 20:35:19 GMT

Hello, and thanks for the patience waiting for my reply.

Our team informs me that when the P-GPS library determines it needs new predictions, it sends a PGPS_EVT_REQUEST event. This event is processed by the Location library in method_gnss.c function method_gnss_pgps_handler(). This causes the method_gnss_pgps_request_work work item to be submitted, which starts the prediction download. If you want to postpone the download, you can just submit the work item later.

RE: Skip PGPS expire checking?

DannisWong — Thu, 19 Sep 2024 00:25:35 GMT

SDK2.5.0 and modem firmware 1.3.6

RE: Skip PGPS expire checking?

Øyvind — Wed, 18 Sep 2024 07:43:46 GMT

Hello Dannis,

Dejan is currently OoO and I have been assigned this ticket. What modem FW and SDK version are you developing with?

Kind regards,
Øyvind

RE: Skip PGPS expire checking?

DannisWong — Mon, 09 Sep 2024 01:06:35 GMT

I use sample code : Location and use REST as transport protocol

RE: Skip PGPS expire checking?

dejans — Fri, 06 Sep 2024 10:19:11 GMT

Hi,

P-GPS library has two ways to control the timing of the data download which are described in the P-GPS library documentation. Transport protocol can also affect the flow.

Do you use any of our existing applications/samples or do you have your own application?
Do you connect directly to the nRF Cloud? If yes, which transport protocol do you use MQTT, REST or CoAP?

Best regards,
Dejan

RE: Skip PGPS expire checking?

DannisWong — Thu, 05 Sep 2024 00:52:34 GMT

its not make sense, I think its a way for us to choose download or not, now issue is P-GPS download make GNSS tracking not work for several minutes, its not acceptable.

we understand the predictions must be downloaded and we will do it, just want to manual control which time to download.

RE: Skip PGPS expire checking?

dejans — Wed, 04 Sep 2024 12:09:49 GMT

Hi Dannis,

Common P-GPS use is that device is frequently disconnected from the nRF Cloud but needs periodic GNSS fixes very quickly for power saving. P-GPS data is downloaded only when that is needed. If device already has predictions, no new predictions are downloaded. If device does not have predictions, those predictions must be downloaded.

Best regards,
Dejan

RE: Skip PGPS expire checking?

DannisWong — Wed, 04 Sep 2024 00:47:52 GMT

Yes, I base on Location Sample project to develop, and as a user, when we request a GNSS location, we don't want to download PGPS, it will look like GNSS tracking struck a few minutes

and of course we want to use PGPS function to make GNSS tracking as fast as it can

Best Regards

Dannis

RE: Skip PGPS expire checking?

dejans — Tue, 03 Sep 2024 12:40:03 GMT

Hi,

Is it that you tested our solution, and you see that P-GPS data is downloaded too often but you are not satisfied with the functionality when using Location library?

Best regards,
Dejan

RE: Skip PGPS expire checking?

DannisWong — Tue, 03 Sep 2024 03:13:02 GMT

I would like to manually control the GNSS process to check PGPS database, sometimes I don't want it download PGPS data and just use currently stored data to run

for example: this time just run GNSS and use stored PGPS data, next time before GNSS, connect nrfcloud and download if updated PGPS found

RE: Skip PGPS expire checking?

dejans — Mon, 02 Sep 2024 11:29:40 GMT

Hi,

[quote user=""]I m developing a project in nref9160, in GNSS part, I need to use PGPS, but can I control the checking in nrfCloud?[/quote]

What do you refer to as "control the checking"?

[quote user=""]sometimes it go to download PGPS and make GPS tracking stuck in user interface, can I control the time for this expire checking?[/quote]

Can you rephrase this? Which time you want to control? What do you refer to as "expire checking"?

Best regards,
Dejan