On Sat, 12 Jan 2008 13:32:00 -0000, "Sky-Catcher" bobhope@nohope
wrote:

I looked at the faq but didn't see an answer to my question, namely how
much data is transfered each minute? I would like to know the ball park on
this to see any possible impact on my data limits with my isp. Do you know
the value?

The details of the data formats used on the WL IP link haven't been
disclosed by Davis yet and so I can't answer definitively.

But the data could be just one loop packet (or perhaps an averaged
version - over 60secs - but still in loop format) in which case it
would be around 100 bytes per minute (ie 6K/hour / 144K/day /
4.3MB/month). Even if a new format is being used (ie not the existing
loop format) there's no reason in theory why the total should be more
than 100 bytes per upload, indeed it's possible to code the key
current conditions in much less than 100 bytes.

Any archive data transfers would be additional to this and the size of
these would depend on what archive interval was set, but worst case
would perhaps be the same again in round numbers, or say 10MB in total
per month. I can't see this impacting much on most ADSL/cable
allowances though you might have to be more careful when checking the
impact on any cellular (ie mobile phone) Internet link.

JGD

John,

I can certainly live with only 10MB or so! I also note that you can set the
upload to longer intervals than 1 min so if there was a concern you can do
less frequent updates...

Cheers,

Sky.


"John Dann" wrote in message
...
On Sat, 12 Jan 2008 13:32:00 -0000, "Sky-Catcher" bobhope@nohope
wrote:

I looked at the faq but didn't see an answer to my question, namely how
much data is transfered each minute? I would like to know the ball park on
this to see any possible impact on my data limits with my isp. Do you know
the value?

The details of the data formats used on the WL IP link haven't been
disclosed by Davis yet and so I can't answer definitively.

But the data could be just one loop packet (or perhaps an averaged
version - over 60secs - but still in loop format) in which case it
would be around 100 bytes per minute (ie 6K/hour / 144K/day /
4.3MB/month). Even if a new format is being used (ie not the existing
loop format) there's no reason in theory why the total should be more
than 100 bytes per upload, indeed it's possible to code the key
current conditions in much less than 100 bytes.

Any archive data transfers would be additional to this and the size of
these would depend on what archive interval was set, but worst case
would perhaps be the same again in round numbers, or say 10MB in total
per month. I can't see this impacting much on most ADSL/cable
allowances though you might have to be more careful when checking the
impact on any cellular (ie mobile phone) Internet link.

JGD

In message , John Dann
writes
For anyone that might be interested: We're currently trialling a Davis
6555 WeatherlinkIP logger. (If you've missed previous posts, this is a
new Weatherlink logger with an IP interface, meaning that it can be
plugged in directly to an Intenret connection.) I'll post some more
details once we've accumulated a bit of experience,

Davis seem to have decided to release this part more quickly than I
anticipated just a couple of weeks ago and it should be available here
hopefully within the next 2-3 weeks. Haven't got an official price yet
but apparently it will be the same as the other specialist loggers eg
6550.

You can see our data on the central Weatherlink website from this test
installation at:

http://www.weatherlink.com/user/prodata/

(NB This is only a test at our end at this stage and so the live data
may be limited and intermittent.)

John Dann
www.weatherstations.co.uk
Very timely John! Was just thinking I ought to be looking for an
RS232-Ethernet adapter for more flexibility on my home network. The new
laptop I just bought to run KnaresboroughWeather might be taken away
from base in future, so I would temporally transfer duties to an old
desktop machine elsewhere in the house. (Although, duh, I could just
move the console!, though ISTR recall reception was v poor in the
"office")
--
steve

Weather at Scotton, Knaresborough, North Yorkshire
http://www.knaresboroughweather.co.uk