A sidenote about the *E2GPSCTL parameters. According to thinkwiki, the
3rd parameter may be used to activate the DGPS feature. However, when I
set this value (AT*E2GPSCTL=1,5,1 for example), I notice that :

1/ the stream is refreshed every second, and not every 5 seconds (as it
works when just setting AT*E2GPSCTL=1,5)

2/ some spurious or blank lines, not starting with $GP are interleaved
in the regular NMEA stream (from /dev/ttyACM2). These lines look like
the characters of the end of previous NMEA sentences, quite strange.
Firmware bug?

3/ no DGPS information appears in the NMEA $GPGGA sentences, even after
a 3D fix is successfully obtained. According to
http://aprs.gids.nl/nmea/#gga the DGPS information should appear in the
last two fields of the $GPGGA string. But I may be in a location where
DGPS stations are out-of-reach.

So, at the difference of the wiki that suggests to setup the GPS using
"AT*E2GPSCTL=1,5,1", I prefer to use the command "AT*E2GPSCTL=1,5"
instead.

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https://bugs.launchpad.net/bugs/783220

Title:
  [needs-packaging] Missing packages for mbm-gpsd and mbm-gps-control

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