Using GPS on RF9160.

RE: Using GPS on RF9160.

Håkon Alseth — Mon, 25 Mar 2019 08:48:41 GMT

Hi Alan,

The DK versions v0.7 and v0.8.2 may have bad GPS performance, as per the nRF91 DK errata document available here:

https://www.nordicsemi.com/DocLib?Product=nRF9160%20core%20documentation

There's a newer kit version, v0.8.5, where the GPS antenna match is optimized. On this kit version, the software is the component that is currently missing.

Kind regards,

Håkon

RE: Using GPS on RF9160.

Alan Hasty — Fri, 22 Mar 2019 14:08:02 GMT

Thank you for the response and the pointer to the blog about the dev status.

I'm understanding that after April, I should be able to use the GPS (once I have the updated firmware) without the need to get a new dev kit , i.e. that the hardware is in place, we're just waiting on the software component. Is that correct?

Regards,

Alan.

RE: Using GPS on RF9160.

Håkon Alseth — Fri, 22 Mar 2019 09:26:59 GMT

Hi,

[quote user=""]
Code: Add commands to enable the GPS antenna via the GPS_EN signal and the %XMAGPIO command.
I think the command would look something along the lines of
%XMAGPIO=1,1,1,1574,1577,699,747,748,804,805,850,851,895,896,960,450,451,1710,2200[/quote]

MAGPIO is a AT command feature that can set your GPIOs based on what band is being used.

That specific command enables all three MAGPIO pins, and sets the GPS band corresponding to all MAGPIO pins set to '0'.

Please see the AT command reference guide for more detailed information about that specific line, as it also includes a truth diagram of the MAGPIOx states vs. LTE bands in use.

[quote user=""][/quote]

Questions that I have:
1) In the nRF9160_DK_User_Guide.pdf (V0.7) Section 5.5, there is a note that is highlighted, that this functionality is only available on the modem firmware used in the nRF9160. How do I determine if I have the correct firmware for the GPS function.

2) How do I get the correct firmware if what I have doesn't contain the GPS function.

3) How does the GPS location information get returned to the code? Is it an asynchronous response from the modem?
3b) Is there a command to get the GPS location info returned , and is it possible to control the format of the returned data? In the asset tracker demo the code was returning one of the many GPS format types.

4) For power savings , is it possible to power down the GPS function and only enable it when necessary?

GPS is not yet available, as per the nRF9160 development status:

https://devzone.nordicsemi.com/b/nrf9160-development-status/posts/nrf9160-development-status

Kind regards,

Håkon

RE: Using GPS on RF9160.

Alan Hasty — Thu, 21 Mar 2019 14:35:15 GMT

Thanks!

RE: Using GPS on RF9160.

esivertsen — Thu, 21 Mar 2019 12:25:25 GMT

Moved the post for you, Alan Hasty !

RE: Using GPS on RF9160.

Øyvind — Thu, 21 Mar 2019 07:34:15 GMT

Hello,

You have posted your question in the wrong forum. Please repost the question in the Nordic Support forum.

Thanks!

Best regards,
Oeyvind