Re: [Paparazzi-devel] New GPS recommendation

[Martin Mueller]

Hi Jake,

> So you're saying I should add an EEPROM chip or use gps_ubx_ucenter.xml
> with the MAX-7 to get the faster poll rate of 5Hz?

all non-flash u-blox modules need either an extra EEPROM on board (not added by
you) or the gps_ubx_center.xml module for a configuration at bootup.

The u-blox specifications (currently) say that some series 7 can do up to 10Hz
(e.g. MAX-7Q). Series 6 can mostly do 5Hz with the ROM versions (e.g. NEO-6M) or
2Hz for the flash versions (e.g. NEO-6H). To be sure you have to look it up...

http://www.u-blox.com/de/gps-modules/pvt-modules.html

Martin

>
> Thanks,
> Jake
>
>
> On Tue, Sep 3, 2013 at 5:15 PM, Martin Mueller <address@hidden> wrote:
>
> > Hi Jake,
> >
> > > > That one looks good, but do you know why it's so cheap compared to the
> > > > others?
> >
> > probably those receivers just are that cheap today. The slightly more
> > luxurious
> > "Made in France" version at Drotek costs 35 Euros.
> >
> > The NEOs are a little cheaper than the bigger LEA receiver modules as they
> > only
> > have a ROM and no flash memory. That means that you can not update the
> > software
> > and an extra EEPROM is needed to store configuration data (the HK/Drotek
> > boards
> > do have the EEPROM, or you use gps_ubx_ucenter.xml). On the other side the
> > data
> > sheet guarantees you a 5Hz position update rate with a ROM-based receiver
> > (and
> > not only 2Hz as the LEAs).
> >
> > > Is there any support for the uBlox LEA-7N module?  It looks to be
> > superior
> > > to the 6H
> >
> > Some Lisa/S samples use a u-blox MAX-7 receiver. In the past new generation
> > u-blox receivers were 1:1 replacements, maybe you have to look in the
> > u-blox
> > center if there are some binary configuration messages changed.
> >
> > > After doing more reserch into uBLOX, it seems like the module best suited
> > > for my needs is the MAX-7.  Does anyone know what the support is like for
> > > them?
> > >
> > >
> > http://ava.upuaut.net/store/index.php?route=product/product&path=59_60&product_id=52
> >
> > The modules should be compatible. Be careful with the simple dipole
> > antenna.
> >
> > Martin
> >
> > _______________________________________________
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> >