AGPS_THINGY91

RE: AGPS_THINGY91

Hoang — Tue, 17 Mar 2020 10:55:08 GMT

The first time, i thought these parameters are extracted from: location api https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_link_monitor%2FUG%2Flink_monitor%2Flm_locationapi.html

as nRF Connect -LTE Link Monitor

😃

RE: AGPS_THINGY91

Håkon Alseth — Tue, 17 Mar 2020 10:42:18 GMT

Hi Hoang,

[quote user="hng"]I spent a long time to find the meaning of this "non-intuitive" data.............[/quote]

I am very sorry to hear this. My apologies for the inconvenience, I will make sure that we stop printing magic numbers in this way!

When it prints "No location data available" it will default to a defined area for your MCC. The default location it injects will still help wrt. the time to first fix.

Kind regards,

Håkon

RE: AGPS_THINGY91

Hoang — Tue, 17 Mar 2020 10:31:53 GMT

Thanks so much, Håkon Alseth

I spent a long time to find the meaning of this "non-intuitive" data.............

MVH

Hoang Nguyen

RE: AGPS_THINGY91

Håkon Alseth — Tue, 17 Mar 2020 10:21:38 GMT

Hi Hoang,

It fails to find your specific cell tower, then falls back to a generic location according to the country code (MCC). The data is printed in a non-intuitive way, and I will report this internally.

Kind regards,

Håkon

RE: AGPS_THINGY91

Hoang — Mon, 16 Mar 2020 09:19:07 GMT

[quote userid="2115" url="~/f/nordic-q-a/59034/agps_thingy91/239907"]Its a generic lookup based on the MCC (country code).[/quote]

How can I convert them (Lat: 6407964 Lon: 715361 ) to the values which can use in https://www.google.com/maps to find my position

[quote userid="2115" url="~/f/nordic-q-a/59034/agps_thingy91/239907"]Do you get those errors every time you boot? I tried with an older sim I have here, but cannot seem to replicate this behavior.[/quote]

I used Telia SIMcard for all my applications with the old_version of ncs_1.0.0 (joakim), and it worked well.

With the AGPS, I updated new ncs and new Modem FW, but it couldnt work with Telia SIMCard

I changed to Telenor SIMcard, it worked now.

Thanks

MVH

Hoang Nguyen

RE: AGPS_THINGY91

Håkon Alseth — Mon, 16 Mar 2020 08:59:41 GMT

[quote user="hng"]Lat: 6407964 Lon: 715361 [/quote]

Its a generic lookup based on the MCC (country code).

[quote user="hng"]Is it how AGPS can: Indoors location acquisition? [/quote]

AGPS will help you get ephemeris and almanac, which will help in terms of time to first fix, but it will not help if there is no GPS signal to receive. Getting acq. indoors is the same with AGPS as without.

[quote user=""]Could you tell me what is the problem? Telia SIMCard?[/quote]

Do you get those errors every time you boot? I tried with an older sim I have here, but cannot seem to replicate this behavior.

Kind regards,

Håkon

RE: AGPS_THINGY91

Hoang — Fri, 13 Mar 2020 12:28:07 GMT

Dear Håkon Alseth

Another thing,

MCC location info injected, MCC: 242
	Lat: 6407964 Lon: 715361
	Unc semiminor: 127
	Unc semimajor: 117
	Confidence: 85
	Orientation: 0

The position is determined from MCCMNC:

Lat: 6407964 Lon: 715361

How can we find the position from these values?

Is it how AGPS can: Indoors location acquisition?

Thanks,

Mvh

Hoang Nguyen