[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [gpsd-dev] PPS over USB

From: Dave Taht
Subject: Re: [gpsd-dev] PPS over USB
Date: Sun, 6 May 2012 16:11:03 -0700

On Sun, May 6, 2012 at 3:48 PM, Gary E. Miller <address@hidden> wrote:
> Yo Terje!
> On Sun, 06 May 2012 23:56:38 +0200
> Terje Mathisen <address@hidden> wrote:
>> Eric S. Raymond wrote:
>>  > Gary E. Miller<address@hidden>:
>>  >> Ugh.  The Garmin 18s are unsuitable for indoor use.  The uBlox6
>>  >> in the GR-601W works well in my basement.
>>  >
>>  > And in my office.  Indoor usability is *strongly* desirable for
>>  > this application. Gary is right, the Garmin 18 would not be a good
>>  > match.
>> The Garmin 18 was replaced by the 18x several years ago, wasn't it?
> Yes.  I have an 18x but not tried it yet.
>> My default at-home S1 server has the original 18 with rooftop
>> antenna, a hand-soldered (for PPS) SURE board works fine indoors.
> I did the same for years at my office.  The Garmin18 works fine when
> roof mounted.  Not so good on the side of my house.  So it was easier to
> buy a SiRFIII then to get the Garmin18 on my house roof.
>> BTW, I just picked up a NetGear 3800 for the BufferBloat firmware, I
>> intend to point that router at the local S1, which should result in
>> better timing than a PPS over USB solution.

I'm tickled. Stick with the current cero firmware tho... and we have
some cool new stuff happening in a week or two more. It did,
last I looked, run gpsd fine, you did have to do an opkg install of the
right kmod-serial-something.

> Yup.  I would guess 10x to 20x better from my recent experience.

Heh. Don't count your eggs before you measure. When a box is running flat out
97% of the time spent in the interrupt handler, god knows what will happen.

There are always heisenbugs.

(note the above is against an unreleased version of cerowrt, running
 at the fastest speed yet achieved, where we found new problems)

> ---------------------------------------------------------------------------
> Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97701
>       address@hidden  Tel:+1(541)382-8588

Dave Täht
SKYPE: davetaht
US Tel: 1-239-829-5608

reply via email to

[Prev in Thread] Current Thread [Next in Thread]