nRF9160, Cellular positioning in multi-cell mode

[Stas Jis]

We use nRF9160 DK (with Serial LTE Modem 1.9.1).
We tried to use cellular positioning in multi-cell mode, but the type in the answer was always "0" (#XCELLPOS: 0,32.705838,35.174798,1005).
What do we do incorrectly?
Expected result: #XCELLPOS: 1,32.705838,35.174798,1005

I attached logs with AT command sequence:

022-09-13T10:47:07.963Z DEBUG modem >> AT+CFUN?
2022-09-13T10:47:07.984Z DEBUG modem << +CFUN: 0
2022-09-13T10:47:07.988Z DEBUG modem << 
2022-09-13T10:47:07.990Z DEBUG modem << OK
2022-09-13T10:47:17.790Z DEBUG modem >> AT%XSYSTEMMODE=1,0,0,0
2022-09-13T10:47:17.805Z DEBUG modem << OK
2022-09-13T10:47:24.280Z DEBUG modem >> AT+CFUN=1
2022-09-13T10:47:24.323Z DEBUG modem << OK
2022-09-13T10:47:30.271Z DEBUG modem >> AT#XNRFCLOUD=1
2022-09-13T10:47:30.276Z DEBUG modem << OK
2022-09-13T10:47:34.586Z DEBUG modem << #XNRFCLOUD: 1,0
2022-09-13T10:47:39.547Z DEBUG modem >> AT#XCELLPOS=1
2022-09-13T10:47:39.553Z DEBUG modem << OK
2022-09-13T10:47:40.411Z DEBUG modem << #XCELLPOS: 0,32.705834,35.174803,1008
2022-09-13T10:47:46.051Z DEBUG modem >> AT%NCELLMEAS
2022-09-13T10:47:46.065Z DEBUG modem << OK
2022-09-13T10:47:46.071Z DEBUG modem << %NCELLMEAS: 0,"001B6A02","42503","1D6B",32,1800,214,64,10,42204,39970
2022-09-13T10:47:52.956Z DEBUG modem >> AT#XCELLPOS=2
2022-09-13T10:47:52.960Z DEBUG modem << OK
2022-09-13T10:47:54.135Z DEBUG modem << #XCELLPOS: 0,32.705838,35.174798,1005
2022-09-13T10:48:21.372Z INFO Modem port is opened
2022-09-13T10:48:21.375Z DEBUG modem >> AT+CFUN?
2022-09-13T10:48:21.385Z DEBUG modem << +CFUN: 0
2022-09-13T10:48:21.388Z DEBUG modem << 
2022-09-13T10:48:21.389Z DEBUG modem << OK
2022-09-13T10:48:31.383Z DEBUG modem >> AT%XSYSTEMMODE=1,0,0,0
2022-09-13T10:48:31.397Z DEBUG modem << OK
2022-09-13T10:48:37.952Z DEBUG modem >> AT+CFUN=1
2022-09-13T10:48:37.994Z DEBUG modem << OK
2022-09-13T10:48:44.839Z DEBUG modem >> AT#XNRFCLOUD=1
2022-09-13T10:48:44.844Z DEBUG modem << OK
2022-09-13T10:48:49.470Z DEBUG modem << #XNRFCLOUD: 1,0
2022-09-13T10:48:54.663Z DEBUG modem >> AT%NCELLMEAS
2022-09-13T10:48:54.671Z DEBUG modem << OK
2022-09-13T10:48:54.678Z DEBUG modem << %NCELLMEAS: 0,"001B6A02","42503","1D6B",36,1800,214,64,9,40507,39873
2022-09-13T10:49:03.895Z DEBUG modem >> AT#XCELLPOS=2
2022-09-13T10:49:03.900Z DEBUG modem << OK
2022-09-13T10:49:04.690Z DEBUG modem << #XCELLPOS: 0,32.705838,35.174798,1005

[Charlie]

Hi Stas,

Here is my test log. It seems your device did not detect other neighbour cells. It only shows the cell station you connect with.

2022-09-14T12:19:00.241Z DEBUG modem >> AT#XNRFCLOUD=1
2022-09-14T12:19:00.246Z DEBUG modem << OK
2022-09-14T12:19:04.405Z DEBUG modem << #XNRFCLOUD: 1,0
2022-09-14T12:19:09.229Z DEBUG modem >> AT#XCELLPOS=1
2022-09-14T12:19:09.234Z DEBUG modem << OK
2022-09-14T12:19:09.960Z DEBUG modem << #XCELLPOS: 0,59.918939,10.685860,881
2022-09-14T12:19:23.686Z DEBUG modem >> AT#XCELLPOS=2
2022-09-14T12:19:23.693Z DEBUG modem << OK
2022-09-14T12:19:23.695Z DEBUG modem << #XCELLPOS: 
2022-09-14T12:19:24.153Z DEBUG modem << %CESQ: 61,3,14,2
2022-09-14T12:19:36.690Z DEBUG modem << %CESQ: 255,0,255,0
2022-09-14T12:22:07.233Z DEBUG modem >> AT%NCELLMEAS
2022-09-14T12:22:07.276Z DEBUG modem << OK
2022-09-14T12:22:07.363Z DEBUG modem << %CESQ: 61,3,13,1
2022-09-14T12:22:08.020Z DEBUG modem << %NCELLMEAS: 0,"031B4300","24201","7789",65535,6400,34,61,16,203399,6400,310,60,13,0,300,210,43,16,24,300,211,42,15,24,1450,346,52,16,33,0
2022-09-14T12:22:08.021Z DEBUG modem << %CESQ: 255,0,255,0
2022-09-14T12:22:31.223Z DEBUG modem >> AT#XCELLPOS=2
2022-09-14T12:22:31.229Z DEBUG modem << OK
2022-09-14T12:22:32.324Z DEBUG modem << %CESQ: 60,3,15,2
2022-09-14T12:22:33.871Z DEBUG modem << #XCELLPOS: 1,59.919113,10.687236,125
2022-09-14T12:22:34.426Z DEBUG modem << %CESQ: 63,3,20,2

Best regards,

Charlie

[Duoc Ngo]

Hi. I have a nRF9160 dev kit. I want to use XCELLPOS to know to location.

I use the application firmware nrf9160dk_serial_lte_modem_2023-03-02_8f26142b.hex.

But I always got the error at AT#XNRFCLOUD=1 and AT#XCELLPOS=1

The response is: ERROR

I also attached the log. 

Thank you very much.

Log Cellular positioning method.docx