[ntp:questions] Fwd: Re: NetBSD GPS/PPS using 4.2.6p3

David J Taylor david-taylor at blueyonder.co.uk.invalid
Fri Aug 26 18:38:36 UTC 2011


"unruh" <unruh at wormhole.physics.ubc.ca> wrote in message 
news:slrnj5fb3r.p7n.unruh at wormhole.physics.ubc.ca...
> On 2011-08-26, Steve Kostecke <kostecke at ntp.org> wrote:
[]
>> http://www.eecis.udel.edu/~mills/ntp/html/drivers/driver20.html states:
>>
>> "The driver will send a $PMOTG,RMC,000*1D<cr><lf> comand each poll
>> interval. This is not needed on most GPS receivers because they
>> automatically send $GPRMC every second, but helps a Motorola GPS
>> receiver that is otherwise silent. NMEA devices ignore commands they do
>> not understand."
>
> That should surely be a flag, not a default. To send out sentences by
> default that you know most units do not understand is irresponsible.
> There is not guarentee that all others devices will ignore it. It is
> also an ugly kludge which in 20 years should have received a better
> solution.
> (And are there any Motorola devices that still behave that way?)

Agreed, it should not be sent by default.

However, this does still not explain the difference I see between 4.2.7p97 
and 4.2.7p206.

Cheers,
David 




More information about the questions mailing list