Huawei ME909u-521: unable to get GPS data

[Yegor Yefremov]

On Thu, May 29, 2014 at 7:06 PM, Dan Williams <dcbw at redhat.com> wrote:
> On Wed, 2014-05-28 at 17:01 +0200, Yegor Yefremov wrote:
>> Has anyone experience with this LTE card? "GSM" stuff is working, but
>> I can't get GPS, i.e. if I issue "AT^WPDGP" like shown here
>> http://openbsd.7691.n7.nabble.com/Huawei-EM770W-modem-in-GPS-mode-td78042.html,
>> I get NMEA data on /dev/ttyUSB3, but it's empty even after several
>> minutes:
>>
>> $GPVTG,,T,,M,,N,,K,N*2C
>> $GPGSA,A,1,,,,,,,,,,,,,,,*1E
>> $GPGGA,,,,,,0,,,,,,,,*66
>> $GPRMC,,V,,,,,,,,,,N*53
>
> It can take a long time to get a fix without A-GPS, which may or may not
> be active here.  The first thing I would do is wait longer (10 minutes?)
> before giving up.  Also, are you able to test the same device under
> Windows, to see if the GPS there actually works and to establish a
> baseline for time-to-fix?

I was also going to try Windows driver. I hope I will be able to find them.

Getting a fix is another question, but I should at least see some
satellites after relative short period of time. Other cards, like
Sierra or Ericsson see some satellites at once.

Yegor

>> I'm using active GPS antenna on the middle connector (G). The same
>> constellation worked on MC7304.
>>
>> Card's info:
>>
>> /org/freedesktop/ModemManager1/Modem/0 (device id
>> 'b762c13b41d85a0261ce9d267c74d18cba3c76d4')
>>   -------------------------
>>   Hardware |   manufacturer: 'Huawei Technologies Co., Ltd.'
>>            |          model: 'ME909u-521'
>>            |       revision: '11.235.07.00.00'
>>            |      supported: 'gsm-umts, lte'
>>            |        current: 'gsm-umts, lte'
>>            |   equipment id: '860461024093430'
>>   -------------------------
>>   System   |         device:
>> '/sys/devices/ocp.3/47400000.usb/47401400.usb/musb-hdrc.0.auto/usb1/1-1/1-1.3'
>>            |        drivers: 'option1, cdc_ether'
>>            |         plugin: 'Huawei'
>>            |   primary port: 'ttyUSB2'
>>            |          ports: 'ttyUSB0 (at), eth2 (net), ttyUSB2 (at),
>> ttyUSB3 (at)'
>>   -------------------------
>>   Numbers  |           own : '+491781364987'
>>   -------------------------
>>   Status   |           lock: 'none'
>>            | unlock retries: 'sim-pin (3), sim-pin2 (3), sim-puk (10),
>> sim-puk2 (10)'
>>            |          state: 'registered'
>>            |    power state: 'on'
>>            |    access tech: 'umts'
>>            | signal quality: '40' (recent)
>>   -------------------------
>>   Modes    |      supported: 'allowed: 4g; preferred: none
>>            |                  allowed: 3g; preferred: none
>>            |                  allowed: 2g; preferred: none
>>            |                  allowed: 2g, 3g, 4g; preferred: none'
>>            |        current: 'allowed: 2g, 3g, 4g; preferred: none'
>>   -------------------------
>>   Bands    |      supported: 'unknown'
>>            |        current: 'unknown'
>>   -------------------------
>>   IP       |      supported: 'ipv4, ipv6, ipv4v6'
>>   -------------------------
>>   3GPP     |           imei: '860461024093430'
>>            |  enabled locks: 'none'
>>            |    operator id: '26203'
>>            |  operator name: 'simyo simyo'
>>            |   subscription: 'provisioned'
>>            |   registration: 'home'
>>   -------------------------
>>   SIM      |           path: '/org/freedesktop/ModemManager1/SIM/0'
>>
>>   -------------------------
>>   Bearers  |          paths: 'none'
>>
>> Regards,
>> Yegor
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>
>