The DS2450 PIO description seems alittle
confusing..see below I know the corresponding PIO.x has to be set (1) to
be able to read from the Volt.x parameters, otherwise the Volt.x parameter are
always 0.0000 irrespective of the channels input.
PIO.A ... PIO.D PIO.ALL
read-write, yes-no
Pins used for digital control. 1 turns the switch on (conducting). 0
turns the switch off (non-conducting).
Control is specifically enabled. Reading volt will turn off this con-
trol.
ALL is an aggregate of the voltages. Readings are made separately.
----- Original Message -----
Sent: Saturday, November 04, 2006 12:11
AM
Subject: Re: [Owfs-developers] Fwd: [owfs
- Help] DS2450 and the NSLU2 (SLUG)
Christian
I did a standard ipkg install and
just rebooted, owfs picked up the 4 devices on the network and I did not
do anything else. Basically I use it as a data collector and simple web server
"owfs + rrdtool + thttpd + smtpclient +
NTP
I have used the TOP command
to monitor CPU load and thttpd only takes 1-2 % CPU load to serve web pages
and my script when it runs takes less than 1% load. rrdtool can take up
to 90% cpu utilisation.
today did an ipkg update and it
reported an update to "owlib on root from 2.4p1-1 to
2.5p5-4..."
How do you read your
sensors from the NSLU2?
Answer: just
use a bash script to gather the data...see below... didn't know ifI
should use cached or uncached so I used uncached
## Read script ############
#!/bin/bash
PH=$(/opt/bin/awk
'{printf "%4.2f\n",((($0-1)/2.6667)+5.5)}'
/tmp/1wire/uncached/20.B71F05000000/volt.A)
US=$(/opt/bin/awk
'{printf "%5.1f\n",($0*100)}'
/tmp/1wire/uncached/20.B71F05000000/volt.B)
T_DEGC=$(/opt/bin/awk
'{printf "%3.1f\n",((($0-1)*5)+20)}'
/tmp/1wire/uncached/20.B71F05000000/volt.C)
CO2=$(/opt/bin/awk -v
PH="$PH" '{printf "%4.1f\n",((3*$0)*(10^(7-PH)))}' /public/kh_value)
TDS=$(/opt/bin/awk -v COND="$US" '{printf "%3.1f\n",(COND*$0)}'
/public/tds_factor)
LITRES=$(/opt/bin/awk '{printf
"%3.1f\n",(($0-3.1)*65)}'
/tmp/1wire/uncached/20.952A05000000/volt.D)
rrdtool update
/public/aquaph.rrd N:$PH
rrdtool update /public/aquadegc.rrd
N:$T_DEGC
rrdtool update /public/aquaco2.rrd N:$CO2
rrdtool update /public/aquacond.rrd N:$US
rrdtool update
/public/level.rrd
N:$LITRES
##########################
Are the grahps
generated on the actual NSLU2?
Answer: Yes I use
rrdtool, on the NSLU2
Do you read from a
mounted fuse-filesystem on the NSLU2, or are you connecting to a running
owserver on the NSLU2?
Answer: I just read
from the file system
Do you use the
owshell-commands on a NSLU2 or some other
remote-server?
Answer: Everything is
running on the NSLU2,
Do you use the
Bonjour/Zeroconf feature on the
NSLU2?
Answer: ??? Don't
know what this is, must have a look ? never touched any of the owfs
configuration files. Just use the :3001 web page to view some data and
reset the PIO.x flags.
Is it normal to have all these processes running
for 4 off 1wire devices on the network ?
## Output of ps ################
446
root 848 S owserver -P
/opt/var/run/owserver.pid -u -p 3002
456
root 852 S owserver -P
/opt/var/run/owserver.pid -u -p 3002
462
root 928 S owfs -P
/opt/var/run/owfs.pid -s 3002 /tmp/1wire
464
root 928 S owfs -P
/opt/var/run/owfs.pid -s 3002 /tmp/1wire
466
root 928 S owfs -P
/opt/var/run/owfs.pid -s 3002 /tmp/1wire
471
root 628 S owftpd -P
/opt/var/run/owftpd.pid -s 3002 -p 0.0.0.0:
474
root 628 S owftpd -P
/opt/var/run/owftpd.pid -s 3002 -p 0.0.0.0:
475
root 628 S owftpd -P
/opt/var/run/owftpd.pid -s 3002 -p 0.0.0.0:
476
root 628 S owftpd -P
/opt/var/run/owftpd.pid -s 3002 -p 0.0.0.0:
481
root 488 S owhttpd -P
/opt/var/run/owhttpd.pid -s 3002 -p 3001
484
root 492 S owhttpd -P
/opt/var/run/owhttpd.pid -s 3002 -p 3001
488
website 4056 S /usr/sbin/thttpd -C
/etc/thttpd-website.conf
639
root 928 S owfs -P
/opt/var/run/owfs.pid -s 3002 /tmp/1wire
640
root 928 S owfs -P
/opt/var/run/owfs.pid -s 3002 /tmp/1wire
641
root 928 S owfs -P
/opt/var/run/owfs.pid -s 3002 /tmp/1wire
644
root 492 S owhttpd -P
/opt/var/run/owhttpd.pid -s 3002 -p 3001
702
root 492 S owhttpd -P
/opt/var/run/owhttpd.pid -s 3002 -p 3001
715
root 928 S owfs -P
/opt/var/run/owfs.pid -s 3002 /tmp/1wire
789
root 928 S owfs -P
/opt/var/run/owfs.pid -s 3002 /tmp/1wire
5218
root 928 S owfs -P
/opt/var/run/owfs.pid -s 3002 /tmp/1wire
5219
root 928 S owfs -P
/opt/var/run/owfs.pid -s 3002 /tmp/1wire
5220
root 928 S owfs -P
/opt/var/run/owfs.pid -s 3002 /tmp/1wire
9222
root 824 S upnpd
&>/dev/null
10012 root 1828
S sshd:
root <at> ttyp010014
root 568 S -sh
10236
root 852 S owserver -P
/opt/var/run/owserver.pid -u -p 3002
10237
root 852 S owserver -P
/opt/var/run/owserver.pid -u -p 3002
cheers from australia
----- Original Message -----
Sent: Friday, November 03, 2006 11:40
PM
Subject: Re: [Owfs-developers] Fwd:
[owfs - Help] DS2450 and the NSLU2 (SLUG)
How do you read
your sensors from the NSLU2?
Are the grahps
generated on the actual NSLU2?
Do you read from a
mounted fuse-filesystem on the NSLU2, or are you connecting to a running
owserver on the NSLU2?
Do you use the
owshell-commands on a NSLU2 or some other
remote-server?
Do you use the
Bonjour/Zeroconf feature on the NSLU2?
I'm just trying to
figure out if it could be a network problem (either hardware or owfs-network
code), fuse-related problem, mDNS bugs (in my quick compilation), or problem
the new owshell commands.
/Christian
Från:
owfs-developers-bounces <at> lists.sourceforge.net
[mailto:owfs-developers-bounces <at> lists.sourceforge.net] För Paul Alfille
Skickat: den 3 november 2006
12:24
Till: owfs-developers <at> lists.sourceforge.net
Ämne: [Owfs-developers] Fwd: [owfs -
Help] DS2450 and the NSLU2 (SLUG)
>From the
forum:
----------------------
Read and respond to this message
at:
https://sourceforge.net/forum/message.php?msg_id=3993682
By:
rob_conway
First post to this group however have been usinf owfs
for a couple fo months
and want to grow my network. I have
loaded owfs on my NSLU2 "aka SLUG" and
have a number of devices off the
link. It works great 99.9% of the time and
am very
pleased. I log the data and sync to NTP time and display this on
a
web page.
I was wondering if anybody else has seen the
following with respect to the DS2450
(4 ch A/D)
a/ A PIO channel
sometimes, maybe once per month, change from 1 to 0 thus disabling
the
analog input channel. I then go back into the interface (web
page) and
change it back to 1 and all is well again. It can
happen on any of the the
four channels however only 1 channel PIO gets
changed. I have no scripts quering
PIO.x I suppose
a fix maybe to query the PIO.x's and set it if its 0.
b/ The analog
input reading seems very noisy ie the values change +/- 0.1 volts
on the
Volt.x register ie 0-5v scale. I have ended up doing a number of
reads
and averaging the result over a 15 minute period.
c/ You
will also see on the attached link below a spike on one of the
temperature
inputs. This can happen very infrequent and also
late in the morning so I have
discounted any type of interference.
http://img.photobucket.com/albums/v319/rjconway/1wire.jpg
cheers
rob
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