Skip PGPS expire checking?

[DannisWong]

Hi All

I m developing a project in nref9160, in GNSS part, I need to use PGPS, but can I control the checking in nrfCloud? sometimes it go to download PGPS and make GPS tracking stuck in user interface, can I control the time for this expire checking?

Best Regards

Dannis

[dejans]

Hi,

I m developing a project in nref9160, in GNSS part, I need to use PGPS, but can I control the checking in nrfCloud?

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

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

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

Best regards,
Dejan

[DannisWong]

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

[dejans]

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

[DannisWong]

Hi

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

[dejans]

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

[DannisWong]

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.

[dejans]

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