This is the cct I constructed..its output is 4-20mA however using a 250ohm
resistor it provides 1 - 5 VDC which I feed into one channel of a DS2450 A/D.
What you guy's are taking about sounds great ...direct connect from sensor to
1wire input
http://img.photobucket.com/albums/v319/rjconway/4-20
We use a 2450 based A/D converter
(http://www.aip.de/People/wbittner/1wire/ADWandler.pdf) for
Temperature and pressure (air) sensing. The sensors are 4-20mA
(industrial, made and calibrated by a local company here in Potsdam,
Germany).
But I was never realy happy with the resolution. We have anoth
Anybody has some experience with the HA7NEt device? Is it reliably
working with owfs?
Michael
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We have the following problem here:
When accessing an owserver (connected via a ds2480 rs232 device), we
have at first very good performance. We read/write values mainly
through a java client program (which we now changed to more closely
follow the way owshell behaves).
Then, after some time, the
I'm pretty new to Owfs and have been using Digitemp until I decided
to use a relay with DS2406 switches. So figured I better learn to use
Owfs. It has not been good! I get the same issue with the DS18S20
reading 85C in my house.
I know that Digitemp != Owfs, but Digitemp works fine with the
DS2
Unfortunately, I've had some experience with the HA7NET boxes...
Based on some information that I'd received that indicated that there is
a technical problem with most of the humidity sensors at low humidities,
and the fact that the testing we do is at low humidities, we bought one
HA7NET box and
Michael,
Any chance your java app is opening connections but not closing them?
It's just guess, but I've made this mistake before.
jerry
Michael Weber wrote:
> We have the following problem here:
>
> When accessing an owserver (connected via a ds2480 rs232 device), we
> have at first very good
Am Donnerstag, 6. Dezember 2007 19:02 schrieb decibels.drop:
> cat ~/1wire/uncached/1F.66BD0400/main/10.381755010800/temperature
>
Just curious: Have you tried
cat ~/1wire/uncached/1F.66BD0400/main/uncached/10.381755010800/temperature
,too?
Kind regards
Jan
--
A recent study ha
I might have this problem solved. At least on the box testing it on.
Need to put it back on the original box and see. But it appears my
problem was due to the way Hobby Boards Hub powers the
devices on it's branches and they need to be in powered mode.
Not parasitic.
I had it powered, but somet
On Dec 6, 2007 12:42 PM, Michael Weber <[EMAIL PROTECTED]> wrote:
> All in all: Not good enough for us (I want to see the half day
> variations in air pressure which come from the solar radiative
> pressure, which have about 1hPa=mbar amplitude), but looking at the
> new page http://owfs.org/index
HA7Net works, but is not close to optimized, yet.
I have one of the devices, and so it's only a question of finding time.
Basically the HA7Net gives a web display to 1-wire devices. They have some
pre-programmed support for a few devices, but also allow a "raw" mode to
send byte sequences to a de
Note, there was a fix for DS2409 Hubs after the latest relesase (2.7p0) in
the CVS. 2.7p1 should be released soon incorporating this fix and fixed
thermocouple calculations and fixed serial port setup.
Paul Alfille
On Dec 6, 2007 5:29 PM, decibels.drop <[EMAIL PROTECTED]> wrote:
> I might have t
That is good news, so will be able to run in parasitic mode on DS18S20 thru
the DS2409 Hub, if I understand you correctly. I am still going to run in
powered for now, but good news for the future.
Not sure that would have corrected my problem or not with the Vdd floating.
I am still not understan
On Dec 6, 2007 4:32 PM, Decibels <[EMAIL PROTECTED]> wrote:
>
> That is good news, so will be able to run in parasitic mode on DS18S20 thru
> the DS2409 Hub, if I understand you correctly. I am still going to run in
> powered for now, but good news for the future.
> Not sure that would have correct
>
>
> Just for some comparison info: I currently have a network of 10
> 18B20's in paricitic mode from a USB adaptor, and found that it takes
> about 11 seconds to read the full resolution temperature from all of
> them in sequence. (Using the symultanous then reading the temps
> didn't go any fa
On Dec 6, 2007 7:24 PM, Decibels <[EMAIL PROTECTED]> wrote:
> I am still not understanding a couple things. Best way to start the Owfs
> and
> what about stopping it?
If you mean owserver, you can start it from the command line, from a system
service, from inittab, or perhaps even from a udev scr
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