Questing about getting fix accuracy to the cloud, and a suggestion to further save power with cell position through nRFCloud

RE: Questing about getting fix accuracy to the cloud, and a suggestion to further save power with cell position through nRFCloud

Torje — Wed, 19 Oct 2022 06:30:05 GMT

Thank you both, this is exactly what I was looking for.

RE: Questing about getting fix accuracy to the cloud, and a suggestion to further save power with cell position through nRFCloud

justin — Tue, 18 Oct 2022 23:38:33 GMT

additionally, the nrf_cloud FW library functions use a flag to indicate if you want the response:

nrf_cloud_cell_pos_request()

to generate the JSON: nrf_cloud_cell_pos_request_json_get()

RE: Questing about getting fix accuracy to the cloud, and a suggestion to further save power with cell position through nRFCloud

AndrewKostka — Tue, 18 Oct 2022 22:11:19 GMT

Hello, Torje:

There is a parameter you can add to the request object for cell-based positioning that will stop the position from being reported back over the Cloud to Device (c2d) topics. It's called "doReply":

{
    "appId": "CELL_POS",
    "messageType": "DATA",
    "data": {
        "doReply": false,
        "lte": [
            {
                "mnc": 260,
                "mcc": 310,
                "eci": 21858829,
                "tac": 333,
                "rsrp": -157,
                "rsrq": -34.5,
                "earfcn": 0
            }
        ]
    }
}

This is documented in our Application Protocols repository on GitHub. Hope this helps!

RE: Questing about getting fix accuracy to the cloud, and a suggestion to further save power with cell position through nRFCloud

Torje — Mon, 03 Oct 2022 06:03:15 GMT

Hello Jonathan,

And thank you for your reply. I found the resources helpful.

As to my suggestion, let me clarify:
1. Request cell location to nRFCloud by sending measured cell data.
2. Done. No need to answer with the position data back to the device. Location is shown and stored in the cloud. Saves a downlink and ack. The cloud is where the location is needed to be, not on the device.

I have noticed that after requesting and receiving cell data on the device, the position is shown in nRFCloud even without sending the actual location back to the cloud. Great feature which saves an uplink, and can be even further improved by making the downlink optional as well.

I hope I am making my self understood.

Thank you again for answering my ticket, and have a nice day!

Kind regards,

Torje

RE: Questing about getting fix accuracy to the cloud, and a suggestion to further save power with cell position through nRFCloud

JONATHAN LL — Fri, 30 Sep 2022 20:08:22 GMT

Hi Torje,

nRF Cloud does support NMEA, https://devzone.nordicsemi.com/f/nordic-q-a/67965/difference-between-gps_evt_pvt_fix-and-gps_evt_nmea_fix, so you would only need to use one of the formats described here: https://github.com/nRFCloud/application-protocols/tree/v1/schemas/deviceToCloud/gnss

Not exactly sure about the extended question, do you propose that there would be power optimization if during circumstance where data is retrieved locally on the device (like position) and not send it to the cloud there by not initiating a extra up\down link or terminate it sooner to save power?

The application will be in control to some extent if there is a need buffer data for longer periods between transmission or discard parts of data to reduce data size.

Regards,
Jonathan