Huawei ME909u-521: unable to get GPS data

Yegor Yefremov yegorslists at
Fri May 30 15:46:51 PDT 2014

On Fri, May 30, 2014 at 1:33 PM, Aleksander Morgado
<aleksander at> wrote:
> On 29/05/14 21:55, 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
>>>> >>,
>>>> >> 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.
> Also, make sure you've connected the antenna to the proper connector, in
> case it has multiple of them.

According to Huawei's manual
GPS is in the middle. The question is, whether it is for active or
passive GPS antenna. So far I have tried the active GPS  antenna on
the dedicated GPS connector and passive antenna on the auxiliary one,
but without success. Perhaps GPS connector is for passive antenna?
Would try this.

The card doesn't seem to support Windows.


More information about the ModemManager-devel mailing list