A-GNSS not working in location sample

[heisenbug]

I've testing out the GNSS and Location samples. According to documentation, A-GNSS is enabled by default in the location sample but I am not able to confirm this both through the logs and the code.

When running the GNSS example with A-GNSS enabled, I can clearly see the FW connecting to LTE, GNSS requesting A-GNSS data, and FW downloading the data. The impact on getting a location is also visible.

I cannot see the same in the location example. Even in code, Location sample executes a print out when LOCATION_EVT_GNSS_ASSISTANCE_REQUEST event occurs instead requesting data from the cloud.

Am I missing something here in the Location sample? How can I get A-GNSS working with the location sample?

[dejans]

Hi,

Which NCS version do you use?

Have you tried unmodified sample?

Can you show complete application log from location sample?

Best regards,
Dejan

[heisenbug]

I am using the unmodified location sample from NCS v2.9.0. The sample output is below:

*** Booting nRF Connect SDK v2.9.0-7787b2649840 ***
*** Using Zephyr OS v3.7.99-1f8f3dc29142 ***
Location sample started

Connecting to LTE...
+CEREG: 2,"7EF4","0648BF0C",7
+CSCON: 1
+CEREG: 5,"7EF4","0648BF0C",7,,,"11100000","11100000"
Connected to LTE
%XTIME: "4A","5240428193054A","01"
Waiting for current time
Requesting location with short GNSS timeout to trigger fallback to cellular...
%NCELLMEAS: 0,"0648BF0C","302720","7EF4",432,5070,265,40,11,8088,10332
[00:00:11.161,315] <inf> nrf_cloud_info: Device ID: nrf-351901936411614
[00:00:11.168,731] <inf> nrf_cloud_info: IMEI:      351901936411614
[00:00:11.278,106] <inf> nrf_cloud_info: UUID:      50525631-3738-4f4d-800c-13280a5bc58d
[00:00:11.286,926] <inf> nrf_cloud_info: Modem FW:  mfw_nrf9160_1.3.6
[00:00:11.293,731] <inf> nrf_cloud_info: Protocol:          REST
[00:00:11.300,140] <inf> nrf_cloud_info: Download protocol: HTTPS
[00:00:11.306,640] <inf> nrf_cloud_info: Sec tag:           16842753
[00:00:11.313,385] <inf> nrf_cloud_info: Host name:         api.nrfcloud.com
[00:00:20.266,235] <inf> location: Method specific timeout expired
[00:00:20.273,162] <inf> location: Location retrieval failed using 'GNSS', trying with 'Cellular' next
%NCELLMEAS: 0,"0648BF0C","302720","7EF4",432,5070,265,36,6,19606,5070,247,36,6,0,19392
%NCELLMEAS: 0,"0648BF0C","302720","7EF4",432,19392,5070,265,44,14,19507,1,0
%NCELLMEAS: 0,"0648BF0C","302720","7EF4",432,19392,5070,265,36,6,19686,1,1,5070,247,36,6,0
+CSCON: 0
+CSCON: 1
Got location:
  method: Cellular
  latitude: *********
  longitude: ***********
  accuracy: 788.0 m
  date: 2025-04-24
  time: 18:39:59.248 UTC
  Google maps URL: https://maps.google.com/?q=*********,***********

Requesting location with the default configuration...
+CSCON: 0
[00:02:50.049,041] <inf> location: Method specific timeout expired
[00:02:50.055,572] <wrn> location: GNSS timed out possibly due to too short GNSS time windows
[00:02:50.065,124] <inf> location: Location retrieval failed using 'GNSS', trying with 'Cellular' next
%NCELLMEAS: 0,"0648BF0C","302720","7EF4",432,5070,265,40,11,168395,5070,247,40,11,0,48249
%NCELLMEAS: 0,"0648BF0C","302720","7EF4",432,48249,5070,265,40,9,169525,1,0
%NCELLMEAS: 0,"0648BF0C","302720","7EF4",432,48249,5070,265,39,8,174795,1,0,"062BBA2A","302490","FA64",65535,0,2225,337,27,22,175647,0,0,"062BBA2A","302490","FA64",65535,0,66711,337,20
+CSCON: 1
Got location:
  method: Cellular
  latitude: *********
  longitude: ***********
  accuracy: 497.0 m
  date: 2025-04-24
  time: 18:42:35.234 UTC
  Google maps URL: https://maps.google.com/?q=*********,***********

Requesting low accuracy GNSS location...
+CSCON: 0
Got location:
  method: GNSS
  latitude: *********
  longitude: ***********
  accuracy: 10.3 m
  date: 2025-04-24
  time: 18:44:41.048 UTC
  Google maps URL: https://maps.google.com/?q=*********,***********

Requesting high accuracy GNSS location...
Got location:
  method: GNSS
  latitude: *********
  longitude: ***********
  accuracy: 6.3 m
  date: 2025-04-24
  time: 18:44:45.168 UTC
  Google maps URL: https://maps.google.com/?q=*********,***********

Requesting 30s periodic GNSS location with cellular fallback...
Got location:
  method: GNSS
  latitude: *********
  longitude: ***********
  accuracy: 11.2 m
  date: 2025-04-24
  time: 18:44:47.304 UTC
  Google maps URL: https://maps.google.com/?q=*********,***********