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 )

[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.