Telit LE910C1 - GPS integration

[David Khouya]

Hi,

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
----------------------------------------------------------------------------------

By curiosity, do you know a good references for qmi protocol so I can dig
into it?

Thanks,

David

On Sun, Apr 26, 2020 at 5:54 AM Aleksander Morgado <aleksander at aleksander.es>
wrote:

> Hey!
>
> > I am looking for a way to integrate the current telit GPS code in MM
> 1.12.x but on a LE910C1 that is currently using the qmi interface.
> >
>
> If you're using the modem in QMI mode, are you sure you don't already
> have GPS control using either the LOC or PDS QMI services? Or does the
> Telit modem not support those services?
>
> > As I read in other threads, the way to go would be to migrate the
> mm-broadband-modem-telit gps code section to mm-shared-telit and than add
> it to a new file that would be mm-broadband-modem-qmi-telit. Is that right
> or an other strategy should be used.
>
> That would be the strategy, yes, but only required if the QMI modem
> doesn't support LOC or PDS QMI services.
>
> --
> Aleksander
> https://aleksander.es
>


-- 
*David Khouya*
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