RE: Using nrf9160 as a proper GPS tracker

Didrik Rokhaug — Mon, 24 Feb 2020 13:54:18 GMT

Hi.

It is not possible to run GPS at the same time as LTE on the nRF9160.

[quote user=""]Currently, AFAIK, it only works while in PSM mode which makes it not really work as a real-time, high resolution tracker.[/quote]

We also support GPS while in eDRX (requires mfw > v1.1.0). And, we are working on improving it even more.

[quote user=""] I wan't to keep one position every second and sending it to a server in real-time.[/quote]

Our Product specification lists a hot start acquisition time in good conditions as 1.3 seconds. Getting a fix every second is therefore not possible in most scenarios. We are working on improving the GPS performancs, but you might want to consider using an external GPS instead.

[quote user=""]If, after gotten a fix, I disable the GPS for doing LTE-communication (or just saving power), it takes a long time to regain a new fix (it seems to always cold start at best). Will this be fixed in the future?[/quote]

How do you disable the GPS? And how long does it take to get a fix (after restarting)?

The GPS should hot start unless too much time has passed since last fix (< 30 min).

[quote user=""]Is there / will there be support for (some kind of) aGPS for quicker first time fix?[/quote]

Yes there is:

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/nrf9160/gps/README.html

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/include/supl_os_client.html#supl-client

Best regards,

Didrik