Just note that it is not sufficient to poll alarm directory to discover
units with threshold voltages .
The alarm condition is only set after a conversion. You have to trigger this
conversion in you polling loop via a simultaneous command.
Pascal
2010/2/26 Alessio Sangalli ale...@manoweb.com
$ owread -s 3000 /28.2CCD8000/temperature
30
$
It is work.
--
Serg.
Original Message
Subject: Re: [Owfs-developers] DS2450 alarm thresholds
From: Jim Kusznir jkusz...@gmail.com
To: OWFS (One-wire file system) discussion and help
owfs-developers@lists.sourceforge.net
Just a question: in what way I can use DS2450's alarm threshold feature?
Basically, I want to monitor and detect overvoltages coming on the
Vin. Say I want to report everytime the voltage goes above 20VDC (when
the nominal is 14VCD).
I could setup a voltage divider so that I can measure up to
When in alarm condition, the device should appear in the /alarm directory.
OWFS won't automatically poll the device, you need to do this in your
program. (It can be as simple as a shell script with a loop and a sleep
command).
Paul Alfille
On Thu, Feb 25, 2010 at 6:40 PM, Alessio Sangalli
We've attempted to do this for our own uses (somewhat similar).
Unfortunately, owfs appears to have bugs in this area and does not
perform correctly. I hope to have time to do some low-level debugging
with the 2450 datasheet to figure out where the problem is and submit
a specific bug report.
In
On 02/25/2010 04:15 PM, Paul Alfille wrote:
When in alarm condition, the device should appear in the /alarm directory.
OWFS won't automatically poll the device, you need to do this in your
program. (It can be as simple as a shell script with a loop and a
sleep command).
Oh ok this makes
