[nRF9160] GPS fix never happens when interrupted by LTE-M communication

[Augustin Bricout]

Hello,

I am currently developing a product using the nRF9160. I would like to use concurrently GPS and LTE-M.

I send periodically data to my server using LTE-M network (every 20 seconds), and I would like to acquire a GPS position once in a while.

I am currently forced to stop sending data to the server in order to do a GPS fix.

I would prefer to have the possibility to interrupt my GPS fix when I need to send data, and then resume it. The modem should be gradually gathering the ephemeris data and finally realize a fix. However, the modem does not seems to save the ephemeris data and loses everything when I stop it to use the LTE-M. As a result, I never get a GPS position when I interrupt a fix.

Can I have access to the ephemeris data stored? I saw that it is not possible to do a predicted ephemeris fix so that may be my answer.

Am I forced to do a fix without interruption for the GPS to operate?

Thank you by advance,

Augustin

[Martin Lesund]

Hi Augustin,
The modem only supports running the GPS while in PSM mode or eDRX intervals.

You can of course store the ephemeris data in the flash and forward that to your server if that's preferred.

A-GPS functionality is not yet implemented but may come in the near future. (contact RSM for dates)

[Jesper W.]

And if the RSM never reply to our email .. what then to do ?

Unfortunately lots of these support-question ends with contact your RSM, forcing each of us to write email and wait, wait and wait !!

[Martin Lesund]

Then let us know as you just did

With regards to the original question, A-GPS is now supported and we also have a sample on how to use it.