NRF9160 Sip GNSS ( GPS ) Issue

[Unizen_technologies_Pvt_Ltd]

Hello NRF ,

We have been using NRF9160 DK GEN-1 board for NB-IOT and GNSS tracking and able to configure  network SIM as well as the NRF cloud .

We have used SDK 1.4.2 and GPS tracking example to verify data transmission of the onboard sensors and GPS.

The issue is while running GPS functionality , It always shows status as  unhealthy and GPS coordinates are not getting reflected over cloud  .

Since we have juggled a lot on this and it's creating halt in our production So , kindly reply us to fix this as soon as possible  .

Note : 

1) Refer attachments for more clarification .

2) Network provider : Reliance Jio , India .

[JONATHAN LL]

Hi,

Are you inside when you are testing the GPS?

Regards,
Jonathan

[Unizen_technologies_Pvt_Ltd]

We have Tested in outdoor ( 5th floor terrace )  as well as indoor ( inside office , 2nd floor )

[JONATHAN LL]

GPS does not work in doors. I would recommend that you try again outside away from any tall buildings, as this can hinder the signal from reaching the antenna.  

Most times the issue is due to something covering the antenna like buildings sealings or people. Have you tested with a external antenna?

That said, the GPS performance on the newer DK's do have some improvements. 

Regards,
Jonathan

[Unizen_technologies_Pvt_Ltd]

JONATHAN LL said:

GPS does not work in doors. I would recommend that you try again outside away from any tall buildings, as this can hinder the signal from reaching the antenna.  

- We have tested in this scenario as well .

JONATHAN LL said:

Most times the issue is due to something covering the antenna like buildings sealings or people. Have you tested with a external antenna?

- We have done this with gps antenna which comes with the DK board . But same result .

JONATHAN LL said:

That said, the GPS performance on the newer DK's do have some improvements. 

- You mean to say , GEN-2 boards have better performance related to GPS than GEN-1 Board ?

[JONATHAN LL]

You can check the revision history here:https://infocenter.nordicsemi.com/topic/ug_nrf91_dk/UG/nrf91_DK/revision_history.html?cp=2_0_5_0 

What modem firmware version do you use?

Regards,
Jonathan

[Unizen_technologies_Pvt_Ltd]

JONATHAN LL said:

What modem firmware version do you use?

- mfwnrf9160121.zip and mfwnrf9160123.zip with asset_tracker.v1.4.0-rc2.IPv6.20201029-C.hex example .

Is there anything ,apart from below point ,we can look into ?

Unizen_technologies_Pvt_Ltd said:

I would recommend that you try again outside away from any tall buildings, as this can hinder the signal from reaching the antenna. 

[JONATHAN LL]

Can you share wha verion of the DK you have? what does the sticker say ?


GPS detection can often take more then 10 minutes before you have eungh satelites in sight. you need at least 3 before you an gett any positioning data.


Just to check could you try the GPS example and no sim card, and do a test, see how long it takes to get a GPS fix and postion data. Save it as a logg ad share it. Just want to see if there is anything interupting the GPS from the modem or power mangement side in the asset tracker application.

Regards,
Jonathan

[Unizen_technologies_Pvt_Ltd]

JONATHAN LL said:

Can you share wha verion of the DK you have? what does the sticker say ?

-nrf9160 DK board

-PCA10090

-0.8.5

-2019.6

-960025589

JONATHAN LL said:

Just to check could you try the GPS example and no sim card, and do a test, see how long it takes to get a GPS fix and postion data. Save it as a logg ad share it. Just want to see if there is anything interupting the GPS from the modem or power mangement side in the asset tracker application.

- Ok ,we will check this and update.