It could be that I just need to use a larger geofence for uninterrupted 
results. I was using a radius of 100 meters.


On March 31, 2015 1:39:59 PM CDT, Chris McQuistion <[email protected]> 
wrote:
> The iOS Location service seems to be pretty reliable, if a bit slow to
> respond to location changes.  I've been using it with my home
> automation
> system for quite a while, to determine when I am within 1 kilometer, 5
> kilometers, 10 kilometers, etc.  On that system, I do different
> actions,
> depending on how far I am from home (changing the thermostat
> setpoints,
> mostly.)
> 
> I have a lot of faith in the iOS location services working, within an
> acceptable degree of range and within an acceptable timeframe.  I
> don't
> need pinpoint-accurate location.  I just need it to notice when I'm
> within
> a half-mile of the office or not.
> 
> On Tue, Mar 31, 2015 at 1:36 PM, John F. Eldredge
> <[email protected]>
> wrote:
> 
> > I have had mixed results with cell-tower-based location services.
> The
> > problem is that the closer towers will occasionally have all
> channels in
> > use, leading your phone to connect to a further-away tower. This
> causes
> > your phone to think your location has changed. Does your phone
> support
> > Near-Field Communications? You could mount a couple of NFC tags in
> your
> > office, swipe one of them as you start work, and swipe the other as
> you are
> > about to go home.
> >
> >
> >
> > On March 31, 2015 12:05:34 PM CDT, Chris McQuistion <
> > [email protected]> wrote:
> >>
> >> Some good ideas here (multiple sensors (maybe low-power bluetooth)
> to
> >> detect incoming path vs outgoing path) and some not-so-good-ideas
> >> (implanting sensors inside of my body....)
> >>
> >> iOS (and I assume Android as well) have low power background app
> refresh
> >> (at least this is what Apple calls it) that you can use for
> geo-location.
> >> It isn't actually using GPS, as that would chew up battery power. 
> It is a
> >> background process that uses info from WiFi networks, cell towers,
> etc, to
> >> determine location "passively", so it doesn't chew up a lot of
> battery
> >> power.
> >>
> >> What I got working yesterday was two IFTTT "recipes" to create
> files in
> >> Google Docs and Dropbox for each time I enter or exit the Watkins
> area.
> >> That part actually works.  The next step is doing something with
> that
> >> information (from Google Drive or Dropbox) to launch an action on
> our VoIP
> >> server.
> >>
> >> It still seems kludge-y to me, but I haven't heard a better
> suggestion
> >> that less power (and is fully automated.)
> >>
> >> Chris
> >>
> >> On Tue, Mar 31, 2015 at 6:02 AM, JMJ <[email protected]> wrote:
> >>
> >>> On 03/31/2015 12:54 AM, Tilghman Lesher wrote:
> >>>
> >>>> That's also why I suggested that you place two proximity
> detectors
> >>>> along a single path.  The order in which they activate then
> indicates
> >>>> ingress or egress.
> >>>>
> >>>
> >>> And since nobody has mentioned using a Raspberry Pi yet... you
> could
> >>> make a proximity detector out of a Raspberry Pi with a camera
> and/or a USB
> >>> Bluetooth gadget.
> >>>
> >>> If the work schedule is consistent, you could just schedule the
> PBX to
> >>> route calls based on the time of day.  Yeah, I know... who has a
> consistent
> >>> work schedule any more?  heh heh
> >>>
> >>> JMJ
> >>>
> >>>
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> >>
> > --
> > John F. Eldredge -- [email protected]
> > "Darkness cannot drive out darkness; only light can do that. Hate
> cannot
> > drive out hate; only love can do that." -- Martin Luther King, Jr.
> >
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-- 
John F. Eldredge -- [email protected]
"Darkness cannot drive out darkness; only light can do that. Hate cannot drive 
out hate; only love can do that." -- Martin Luther King, Jr.

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