Telit LE910C1 - GPS integration
David Khouya
dakhouya at gmail.com
Mon Apr 27 14:42:26 UTC 2020
>The above sequence looks good to me; you start the GPS engine and you
>also register for NMEA indications. After that, you should start
>receiving NMEA traces in QMI LOC indications, but I assume you're not
>receiving any? What MM and libqmi versions are you using?
Exact, I did a --location-enable-gps-nmea and --location-get and I don't
get any NMEA traces. I'm currently using MM 1.12.8 and libqmi 1.24.8 on an
arm environment.
>If you google for "Telit QMI LM940" you'll probably find easily a QMI
>reference from Telit, but unfortunately I don't think it has much
>detail on the LOC service itself. Other than that, I don't think there
>are public online references for QMI documents anywhere else. If you
>find some, let us know!
I'll surely share if I find something. I'll check for the LM940
documentation. Thanks!
On Mon, Apr 27, 2020 at 10:23 AM Aleksander Morgado <
aleksander at aleksander.es> wrote:
> Hey,
>
> >
> > I didn't found information in Telit documentation about the GPS control
> with QMI. I'll try to poke them directly. On the other side, I did enable
> the gps with success using mmcli but didn't had any data location under the
> --location-get command.
> > Here is the log when I do the command mmcli -m 0
> --location-enable-gps-nmea if you ever see something unusual.
> >
> ----------------------------------------------------------------------------------
> > <debug> [1587919447.966940] Got QMI WDS event report
> > <debug> [1587919448.098691] Setting up location sources: '3gpp-lac-ci,
> gps-nmea'
> > <debug> [1587919448.098791] Location '3gpp-lac-ci' gathering is already
> enabled...
> > <debug> [1587919448.098826] Location 'gps-raw' gathering is already
> disabled...
> > <debug> [1587919448.098855] Location 'agps-msa' gathering is already
> disabled...
> > <debug> [1587919448.098880] Location 'agps-msb' gathering is already
> disabled...
> > <debug> [1587919448.098901] Need to enable the following location
> sources: 'gps-nmea'
> > [/dev/cdc-wdm0] sent message...
> > <<<<<< RAW:
> > <<<<<< length = 38
> > <<<<<< data =
> 01:25:00:00:10:03:00:03:00:22:00:19:00:13:04:00:E8:03:00:00:12:04:00:02:00:00:00:10:04:00:01:00:00:00:01:01:00:10
> > [/dev/cdc-wdm0] sent generic request (translated)...
> > <<<<<< QMUX:
> > <<<<<< length = 37
> > <<<<<< flags = 0x00
> > <<<<<< service = "loc"
> > <<<<<< client = 3
> > <<<<<< QMI:
> > <<<<<< flags = "none"
> > <<<<<< transaction = 3
> > <<<<<< tlv_length = 25
> > <<<<<< message = "Start" (0x0022)
> > <<<<<< TLV:
> > <<<<<< type = "Minimum Interval between Position Reports" (0x13)
> > <<<<<< length = 4
> > <<<<<< value = E8:03:00:00
> > <<<<<< translated = 1000
> > <<<<<< TLV:
> > <<<<<< type = "Intermediate Report State" (0x12)
> > <<<<<< length = 4
> > <<<<<< value = 02:00:00:00
> > <<<<<< translated = disable
> > <<<<<< TLV:
> > <<<<<< type = "Fix Recurrence Type" (0x10)
> > <<<<<< length = 4
> > <<<<<< value = 01:00:00:00
> > <<<<<< translated = periodic-fixes
> > <<<<<< TLV:
> > <<<<<< type = "Session ID" (0x01)
> > <<<<<< length = 1
> > <<<<<< value = 10
> > <<<<<< translated = 16
> > [/dev/cdc-wdm0] received message...
> > <<<<<< RAW:
> > <<<<<< length = 20
> > <<<<<< data =
> 01:13:00:80:10:03:02:03:00:22:00:07:00:02:04:00:00:00:00:00
> > [/dev/cdc-wdm0] received generic response (translated)...
> > <<<<<< QMUX:
> > <<<<<< length = 19
> > <<<<<< flags = 0x80
> > <<<<<< service = "loc"
> > <<<<<< client = 3
> > <<<<<< QMI:
> > <<<<<< flags = "response"
> > <<<<<< transaction = 3
> > <<<<<< tlv_length = 7
> > <<<<<< message = "Start" (0x0022)
> > <<<<<< TLV:
> > <<<<<< type = "Result" (0x02)
> > <<<<<< length = 4
> > <<<<<< value = 00:00:00:00
> > <<<<<< translated = SUCCESS
> > [/dev/cdc-wdm0] sent message...
> > <<<<<< RAW:
> > <<<<<< length = 24
> > <<<<<< data =
> 01:17:00:00:10:03:00:04:00:21:00:0B:00:01:08:00:04:00:00:00:00:00:00:00
> > [/dev/cdc-wdm0] sent generic request (translated)...
> > <<<<<< QMUX:
> > <<<<<< length = 23
> > <<<<<< flags = 0x00
> > <<<<<< service = "loc"
> > <<<<<< client = 3
> > <<<<<< QMI:
> > <<<<<< flags = "none"
> > <<<<<< transaction = 4
> > <<<<<< tlv_length = 11
> > <<<<<< message = "Register Events" (0x0021)
> > <<<<<< TLV:
> > <<<<<< type = "Event Registration Mask" (0x01)
> > <<<<<< length = 8
> > <<<<<< value = 04:00:00:00:00:00:00:00
> > <<<<<< translated = nmea
> > [/dev/cdc-wdm0] received message...
> > <<<<<< RAW:
> > <<<<<< length = 20
> > <<<<<< data =
> 01:13:00:80:10:03:02:04:00:21:00:07:00:02:04:00:00:00:00:00
> > [/dev/cdc-wdm0] received generic response (translated)...
> > <<<<<< QMUX:
> > <<<<<< length = 19
> > <<<<<< flags = 0x80
> > <<<<<< service = "loc"
> > <<<<<< client = 3
> > <<<<<< QMI:
> > <<<<<< flags = "response"
> > <<<<<< transaction = 4
> > <<<<<< tlv_length = 7
> > <<<<<< message = "Register Events" (0x0021)
> > <<<<<< TLV:
> > <<<<<< type = "Result" (0x02)
> > <<<<<< length = 4
> > <<<<<< value = 00:00:00:00
> > <<<<<< translated = SUCCESS
> >
> ----------------------------------------------------------------------------------
> >
>
> The above sequence looks good to me; you start the GPS engine and you
> also register for NMEA indications. After that, you should start
> receiving NMEA traces in QMI LOC indications, but I assume you're not
> receiving any? What MM and libqmi versions are you using?
>
> > By curiosity, do you know a good references for qmi protocol so I can
> dig into it?
> >
>
> If you google for "Telit QMI LM940" you'll probably find easily a QMI
> reference from Telit, but unfortunately I don't think it has much
> detail on the LOC service itself. Other than that, I don't think there
> are public online references for QMI documents anywhere else. If you
> find some, let us know!
>
>
> --
> Aleksander
> https://aleksander.es
>
--
*David Khouya*
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