GPS compatible modems.

[Marc Murphy]

I have previously managed to get the system to work using the AT interface and you are right it needs to be put into extended command mode and the GPS enabled;
simple_com /dev/ttyUSB3 ATZ
simple_com /dev/ttyUSB3 At!entercnd=\"A710\"
simple_com /dev/ttyUSB3 AT!GPSSTATUS?
simple_com /dev/ttyUSB3 At!gpstrack=1,255,1000,30,1
simple_com /dev/ttyUSB3 AT!GPSSTATUS?

That allows the GPS to get a lock after about 30secs and it spits the NEMA strings out of the /dev/ttyUSB2 port.

The MC7710 cant be enabled by ModemManager as it complains that it is in the powered off state.

-----Original Message-----
From: ModemManager-devel [mailto:modemmanager-devel-bounces at lists.freedesktop.org] On Behalf Of Yegor Yefremov
Sent: 27 November 2014 21:48
To: Marc Murphy
Cc: modemmanager-devel at lists.freedesktop.org
Subject: Re: GPS compatible modems.

On Thu, Nov 27, 2014 at 10:45 PM, Yegor Yefremov <yegorslists at googlemail.com> wrote:
> On Thu, Nov 27, 2014 at 10:32 PM, Marc Murphy <marcmltd at marcm.co.uk> wrote:
>> I am using a BeagleBlack based platform and when I use the AT commands for MC8705 I have no problem getting a fix just cant do anything with MM.
>>
>> I think I am doing it right;
>>
>> # mmcli -L
>>
>> Found 1 modems:
>>         /org/freedesktop/ModemManager1/Modem/0 [Sierra Wireless, 
>> Incorporated] MC8705
>>
>> # mmcli -m 0 -e
>> successfully enabled the modem
>>
>> # mmcli -m 0 --location-status
>>
>> /org/freedesktop/ModemManager1/Modem/0
>>   ----------------------------
>>   Location | capabilities: '3gpp-lac-ci'
>>            |      enabled: '3gpp-lac-ci'
>>            |      signals: 'no'
>>
>> # mmcli -m 0 --location-get
>>
>> /org/freedesktop/ModemManager1/Modem/0
>>   -------------------------
>>   3GPP location   | Mobile country code: '234'
>>                   | Mobile network code: '30'
>>                   |  Location area code: '2089'
>>                   |             Cell ID: '27516'
>>   -------------------------
>>   GPS NMEA traces | Not available
>>   -------------------------
>>   Raw GPS         | Not available
>>   -------------------------
>>   CDMA BS         | Not available
>
> You are missing following commands:
>
> --location-enable-gps-nmea
> --location-enable-gps-raw
>
>> I should be able to enable the NEMA as I can via AT and my own app.
>
> Now try mmcli -m 0 --location-get and you should get your coordinates.

Btw. as for MC8705, it can be that you need to enable GPS first using special password. See here http://whirlpool.net.au/wiki/sierra_advanced_gps But if you can do this via AT, then you've already made this.

Do you have MC7710 at hand? This should be LTE card AFAIK.

Yegor
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