Asset Tracker v2 SUPL Integration

RE: Asset Tracker v2 SUPL Integration

Øyvind — Fri, 23 Dec 2022 09:38:03 GMT

Hello Iman,

Sorry for the late reply. I have forwarded the feedback to our cloud team, and I hope that they can provide some more information to you in regards to the nRF Cloud Location services with cloud-to-cloud.

If you do want to get more information on this solution I think the best option is to directly contact your local RSM.

[quote user="ibiglari"]What I want to achieve at the end of the day is for my hardware on the field to only need to communicate to one entity on the cloud, using one protocol only.[/quote]

Based on that, the cloud to cloud solution with nRF Cloud Location services sounds like the best solution especially to save flash on the device.

Kind regards,

Øyvind

RE: Asset Tracker v2 SUPL Integration

ibiglari — Fri, 16 Dec 2022 20:03:21 GMT

Hi,

[quote userid="77062" url="~/f/nordic-q-a/94701/asset-tracker-v2-supl-integration/401040"]That sounds a little weird, could you please point to where you found that information? [/quote]

Read that on "Location Services in a cloud-to-cloud setup" page. It says "You must have an nRF Cloud Pro or Enterprise plan."

What I want to achieve at the end of the day is for my hardware on the field to only need to communicate to one entity on the cloud, using one protocol only. That would mean no need for SUPL client library, but that is, at least for now, far from being realised as I am still trying to make heads or tails of Google's SUPL client.

The end-goal for me is to have a single LwM2M server that can reply to A-GPS or P-GPS requests by proxying it to either a SUPL service, or to an A-GPS cloud provider. This way the hardware in the field needs to only know about one server, one set of credentials, and one communication protocol (UDP in this case).

Kind Regards,
Iman

RE: Asset Tracker v2 SUPL Integration

Øyvind — Fri, 16 Dec 2022 12:05:16 GMT

[quote user="ibiglari"]In the meantime, were you able to reproduce the issue with the code I attached?[/quote]

No, I am not able to build it on my computer. Still working on it.

[quote user="ibiglari"] Specially since it seems that REST API does not have the same number of free calls per month as MQTT[/quote]

That sounds a little weird, could you please point to where you found that information?

Could you provide information on what your needs are and I will discuss with the nRF Cloud team.

RE: Asset Tracker v2 SUPL Integration

ibiglari — Thu, 15 Dec 2022 22:54:59 GMT

Hi,

Had a quick look. While it sounds promising, I'm afraid the costs are a setback. Specially since it seems that REST API does not have the same number of free calls per month as MQTT 😞

I might end up implementing SUPL support on my server side instead of the client if SUPL library cannot be somehow shrunk. I opened another ticket for that, but not sure if that is going to be feasible.

In the meantime, were you able to reproduce the issue with the code I attached?

Kind Regards,
Iman

RE: Asset Tracker v2 SUPL Integration

Øyvind — Thu, 15 Dec 2022 14:11:02 GMT

Hi Iman,

[quote user="ibiglari"]Do you have any documentations (or better yet, a working sample) regarding how to respond to a LwM2M location assistant request?[/quote]

Yes, our nRF Cloud documentation shows how to communicate with the nRF Cloud Location services: https://docs.nrfcloud.com/LocationServices/LocationServicesOverview/

Have a look at the LwM2M location services which uses AVsystems.

Kind regards,

Øyvind

RE: Asset Tracker v2 SUPL Integration

ibiglari — Wed, 14 Dec 2022 22:54:43 GMT

Hi,

Thanks for your reply.

I am not using P-GPS.

I thought about using nRF Cloud AGPS, but I'd rather use LwM2M location assistance mechanism if I could implement it in my LwM2M server (which is basically a Leshan server object). This would get rid of the massive SUPL library altogether.

Do you have any documentations (or better yet, a working sample) regarding how to respond to a LwM2M location assistant request?

Also, project folder here. devzone.nordicsemi.com/.../asset_5F00_tracker_5F00_v2.7z

I have created a few logger macros to replace LOG_XXX so that I could have some sort of logging while using SUPL. You can perform a Find/Replace to revert back to normal logging.

Kind Regards,
Iman

RE: Asset Tracker v2 SUPL Integration

Øyvind — Wed, 14 Dec 2022 13:21:28 GMT

Iman, thank you for providing this information. Would if be possible to share your project instead?

Have you considered using nRF Cloud AGPS instead?

Do you have P-GPS enabled as well? This requires a good amount of flash.

Kind regards,
Øyvind

RE: Asset Tracker v2 SUPL Integration

ibiglari — Wed, 14 Dec 2022 09:37:19 GMT

Hi,

Sure.

I am using LwM2M, so, in overyal-lwm2m.conf:

CONFIG_SUPL_CLIENT_LIB=y

I have also copied (and slightly modified) assistance.h and assistance_supl.c from 9160 GNSS sample.

Changes to Asset Tracker v2 code:

In main.c:

.
.
.
    self.thread_id = k_current_get();

#if defined(CONFIG_SUPL_CLIENT_LIB)
    assistance_init();
#endif

    err = module_start(&self);
    if (err) {
        LOG_ERR("Failed starting module, error: %d", err);
        SEND_ERROR(app, APP_EVT_ERROR, err);
    }

.
.

.

In lwmem_codec.c:

.
.
.
int cloud_codec_encode_agps_request(struct cloud_codec_data *output,
                    struct cloud_data_agps_request *agps_request)
{
#if defined(CONFIG_SUPL_CLIENT_LIB)
       /* SUPL doesn't usually provide satellite real time integrity information. If GNSS asks
        * only for satellite integrity, the request should be ignored.
        */
       if (agps_request->request.sv_mask_ephe == 0 &&
           agps_request->request.sv_mask_alm == 0 &&
           agps_request->request.data_flags == NRF_MODEM_GNSS_AGPS_INTEGRITY_REQUEST) {
               LOG_INF(" Ignoring assistance request for only satellite integrity\r\n");
       } else {
               LOG_INF(" Assistance data needed, ephe 0x%08x, alm 0x%08x, flags 0x%02x\r\n",
                       agps_request->request.sv_mask_ephe,
                       agps_request->request.sv_mask_alm,
                       agps_request->request.data_flags);
               assistance_request(&agps_request->request);
       }
       return -ENODATA;
#else
    ARG_UNUSED(output);

    int err;

    err = location_assistance_agps_set_mask(&agps_request->request);
    if (err) {
        LOG_ERR("location_assistance_agps_set_mask, error: %d", err);
        return err;
    }

    /* Disable filtered A-GPS. */
    location_assist_agps_set_elevation_mask(-1);

    err = lwm2m_engine_set_u32(LWM2M_PATH(LWM2M_OBJECT_CONNECTIVITY_MONITORING_ID, 0,
                          CELLID),
                   agps_request->cell);
    if (err) {
        return err;
    }

    err = lwm2m_engine_set_u16(LWM2M_PATH(LWM2M_OBJECT_CONNECTIVITY_MONITORING_ID, 0,
                          SMNC),
                   agps_request->mnc);
    if (err) {
        return err;
    }

    err = lwm2m_engine_set_u16(LWM2M_PATH(LWM2M_OBJECT_CONNECTIVITY_MONITORING_ID, 0,
                          SMCC),
                   agps_request->mcc);
    if (err) {
        return err;
    }

    err = lwm2m_engine_set_u16(LWM2M_PATH(LWM2M_OBJECT_CONNECTIVITY_MONITORING_ID, 0,
                          LAC),
                   agps_request->area);
    if (err) {
        return err;
    }

    agps_request->queued = false;
    return 0;
#endif
}

.

.

.

In src/cloud/CMakeLists.txt:

target_sources_ifdef(CONFIG_SUPL_CLIENT_LIB app
                     PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/lwm2m_integration/assistance_supl.c)                     

The only change I made to assistance_supl.c was to hard-code SUPL_SERVER and SUPL_SERVER_PORT:

#define SUPL_SERVER        "supl.google.com"
#define SUPL_SERVER_PORT   7276

//BUILD_ASSERT(sizeof(CONFIG_GNSS_SAMPLE_SUPL_HOSTNAME) > 1, "Server hostname must be configured");

Hope this helps.

Kind Regards,
Iman

RE: Asset Tracker v2 SUPL Integration

Øyvind — Wed, 14 Dec 2022 09:26:53 GMT

Could you provide more information on how you have integrated the SUPL library to the Asset Tracker v2?

RE: Asset Tracker v2 SUPL Integration

Øyvind — Wed, 14 Dec 2022 08:51:43 GMT

My apologies for the late reply. Will get back to you today.

Kind regards,
Øyvind

RE: Asset Tracker v2 SUPL Integration

ibiglari — Fri, 09 Dec 2022 12:52:51 GMT

Hi,

Thanks for your reply. Debug Options are disabled in board configuration.

Kind Regards,
Iman

RE: Asset Tracker v2 SUPL Integration

Øyvind — Fri, 09 Dec 2022 12:45:29 GMT

Hello,

Do you have "debug options" enabled in the board configuration settings?

Will have a look at your issue but will not have an answer before Monday.

Kind regards,
Øyvind