gmane.comp.file-systems.owfs.devel

mdns support

Gregg Levine — 2012-05-26T01:46:10

Hello!
I imagine we're still using mdns support on our programs. The releases
for Slackware never made it past the 10.1 sequence. Which is what I
expected as the site for them has practically ceased operations. I
don't know if this works for the distributions everyone else is using
but it worked here. I went to this website:
http://www.science.uva.nl/research/air/wiki/mDNSResponderInstallation
and followed the steps there. There is a location on the links for the
released code that's telling people what the most recent is. I found
an RC script elsewhere, in this series of steps:
https://trac.ci.uchicago.edu/accessgrid/browser/trunk/packaging/linux/slackware/SL-11.0/mDNSResponder/Slack.build?rev=6305

It's for 11 but that's okay, the rc.d method of doing things has
changed very little since 7.1 and naturally now. About all that has
happened is that the system is definitely on the 2.6 series of kernels
which means udev is the big ticket......

Paul which distribution are you using? Is it OpenSuse? Or FC? Or something else?
-----
Gregg C Levine gregg.drwho8< at >gmail.com
"This signature fought the Time Wars, time and again."

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OWFS Program Differences

R_Have — 2012-05-25T18:04:00

I have been running a OWFS for about a year now, following some great
examples on the owfs website.
However I would like to know more about the full programs.  Currently I am
using owfs, but can anyone explain the differences between owfs, owhttpd,
and owserver, and situations where you would use one verses another.

Thanks R Haveman

DS2890 support

Gregg Levine — 2012-05-24T23:30:41

Hello!
Paul despite the fact that the company Maxim considers the DS2890
technically obsolete and not ready for new designs, which also assumes
probably wrongly they are still being made, is OWFS still supporting
this part number?

Strangely enough the machine that's now running Linux there aren't any
actual serial ports, just a grouping of USB ports, and since I've used
the DS9097 adapters via a USB to RS232 adapter who swings properly, on
Windows as it happens. Its just that I've not tried to use the
programs that way yet on Linux.

And in case anyone is interested, on page 11 bottom half of the data
sheet for the LM334 constant current source once made by National
Semiconductor now made by Texas Instruments, there is an example of a
circuit who uses the part plus two resistors, one fixed and one that
is a variable resistor for trimming. As for how the One-Wire part
would be used there, in place of the regular variable resistor, I'm
not sure.
-----
Gregg C Levine gregg.drwho8< at >gmail.com
"This signature fought the Time Wars, time and again."

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windowsce

Roberto Spadim — 2012-05-23T23:14:01

hi guys...
i was using some android tablets to develop some web sites
now i started some development at windows ce with .net framework

does anyone know if we can port owfs to .net? or maybe windows ce plataform?
just serial (usb-serial converters + ds2480b), rfc2217 and owserver bus
masters

help with hardware

Roberto Spadim — 2012-05-23T06:09:08

hi guys, anyone here use plc sdcd or another control hardware?
i´m using advantech plcs, (adam 5000 series)
does anyone know another good and cheap?

problems with writing data

Arkhipenka Stanislau — 2012-05-22T16:43:57

Hello.
Could you, please, help me to solve a problem:
im trying to use owfs on SPARC64 achitecture.
Im using debian squeeze. I compiled owfs from sources owfs-2.5p15:
./configure --enable-debian  --enable-usb
make
make install 

(also tried ./configure --build=sparc64-linux target=sparc64-linux --enable-
debian --enable-usb)
Im starting owfs server by command:
/opt/owfs/bin/owfs -u --allow_other -m 1wire --error_level=0 --
mountpoint="/mnt/1wire"
and it starts sucsessfuly, but when im trying to write data "echo 1 > 
/mnt/1wire/12.4A7A80000000/PIO.A". there r no resoults from my actions.
i mean when after this im doing cat /mnt/1wire/12.4A7A80000000/PIO.A i resive 
0.
I tried to do the same actions on amd64 and on i386 and it works fine. 
I tried to set --error_level=5 and then compare loges from SPARC64 and amd64 - 
they turned the same (i mean that pid, machine name and adresses are different, 
but the other information is the same).

P.S. im using DS9490R

sorry for my english.

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Release 2.8p15

Paul Alfille — 2012-05-21T01:58:25

Release notes
owfs suite
Version 2.8p15

May 20 2012

Features
1. Memory leak analyzer memleakparser.pl
A. Better comments
B. Handles REALLOC properly
C. Handles intermixed debug messages properly
2. Start of external device support
A. Full syntax documented for external (script launched) devices
B. Help page for external option
C. owexternal binary for external support
D. External device read, write, list and parse implemented
E. External structure supported
3. BAE0910 10bit ADC support (from Pascal Baerten)
4. New Hobbyboards Moisture meter support

Fixes
1. USB handles bus errors with better parameters and better
reinitialization -- patch from Michael Markstaller
2. Memory leak in reading bitfields fixed.
3. Corrected a bug in DS2482 detection code (bad pointer in messages) found
by Patryk
4. FreeBSD build patches from Johan Ström
5. Fix from Jacob Joseph --allow_other can now work in config file
6. Fix structure display for sparse arrays
7. Maxime Soulé found an error in hex conversion

-----------------------------------

Not included (but planned)
1. New EDS ethernet hub support (OW_SERVER-ENET-2)
Inexpensive and has 3 addressable channels
2. DS2483 support
3. More HobbyBoards Moister meter properties (as soon as documented).
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Install owfs in Debian Server

Mick Sulley — 2012-05-20T15:41:49

This probably sounds like a dumb question but what do I need to add to 
/etc/apt/sources.list to install owfs?

I tried
deb http://packages.qa.debian.org/o/owfs.html squeeze main
but it doesn't work.  I'm sure I just have the format wrong.

Thanks
Mick

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DS2483 Support

Stuart Poulton — 2012-05-19T14:02:14

Hi All,

So great news on i2c with Raspberry PI and OWFS.

I've just hooked up my DS2483 sample. Along with the previous test items of 2xUSB 1xDS2482-100 and 1xDS2842-800

/opt/owfs/bin/owserver --usb=all --i2c=/dev/i2c-0:ALL
/opt/owfs/bin/owdir
/28.52DE99000000
/81.A6B821000000
/81.BA4124000000
/28.5B8A57030000
/28.BF8757030000
/bus.12
/bus.10
/bus.9
/bus.8
/bus.7
/bus.6
/bus.5
/bus.4
/bus.3
/bus.2
/bus.1
/bus.0
/uncached
/settings
/system
/statistics
/structure
/simultaneous
/alarm

Great, so lets find out whats on each bus

root< at >berry:~# for I in 0 1 2 3 4 5 6 7 8 9 10 12 ;do   /opt/owfs/bin/owread /bus.$I/interface/settings/name; echo""; done
DS9490
DS2482-100
DS2482-100
DS2482-800(0)
DS2482-800(1)
DS2482-800(2)
DS2482-800(3)
DS2482-800(4)
DS2482-800(5)
DS2482-800(6)
DS2482-800(7)
DS9490

No sign of DS2483, but an additional DS2482. Is more work required to support the DS2483 ?

Stuart


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owhttpd memory consumption

Viktor Vraniak — 2012-05-19T10:54:52

hallo

as first thanks for your great sw ;o)
i am using it on my Ipaq217 (XScale-V3 processor 620MHz, 128MB RAM) with
Angstorm distribution (armv5te architecture)
owhttpd version:
    2.8p14
libow version:
    2.8p14

i found some issue with memory consumption of owhttpd.
i dont know if issue concerns Angstorm build or owhttpd itself, so i am
writing as first here.

when i start owhttpd it consumes 1% of RAM,
but consumption is increasing and after 1 hour it consumes 11% of RAM

i tried to set value for cache with --cache_size, but with no effect

have you some advice for me?

here is how memory consumption icreases checked from ps aux in 10minutes
interval:
2012-05-19 11:06 owhttpd 0.9%
2012-05-19 11:16 owhttpd 2.8%
2012-05-19 11:26 owhttpd 4.6%
2012-05-19 11:36 owhttpd 6.3%
2012-05-19 11:46 owhttpd 8.1%
2012-05-19 11:56 owhttpd 9.9%
2012-05-19 12:06 owhttpd 11.6%
2012-05-19 12:16 owhttpd 13.4%
2012-05-19 12:26 owhttpd 15.2%
2012-05-19 12:36 owhttpd 17.0%


regards
viktor

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Can't Install on Ubuntu

Mick Sulley — 2012-05-16T16:56:17

Just had a server disaster and I am trying to breath life into a 
backup.  Trying to install owfs, from my notes from last time -

edit /etc/apt/sources.list and add
     deb http://owfs.davromaniak.eu/ ubuntu natty
then run
     sudo apt-get upgrade
then run
     sudo apt-get install owfs

When I do that I get

mick< at >solar:/$ sudo apt-get install owfs
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package owfs
mick< at >solar:/$

Has it moved?  I can see the website http://owfs.davromaniak.eu but if I put

http://owfs.davromaniak.eu/ ubuntu natty

into my browser it says 404 Not Found

Can anyone help please?

Thanks
Mick

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how to communicate 1-wire chip using w1d.c

Ethan Xue — 2012-05-16T16:29:55

Hi,

I'm try to use w1d.c from http://www.ioremap.net/archive/w1/. According to
documation "w1.netlink", this program can "uses read/write/search commands
for all master/slave devices found on the bus.". I'm using w1-gpio as w1
master, and i can see the 64bit chip id though sysfs. After i run compiled
w1d, it prints nothing.

So, how to use this program? I can't get answer from its source code.

btw, I've compiled "netlink connector" support in my kernel.

Thanks.
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owserver getting slow when another IP/avahi islost

Michael Markstaller — 2012-05-15T19:43:46

Hi,

while testing around I found a "not so nice" behaviour of owserver (2.8p14):

Scenario:
- turn on owserver1 on box1 with --autoserver
- turn on owserver2 on box2 with --zero

-> All fine

- turn off (or shutdown or kill or disconnect) owserver2

-> from now on, every 'owdir' against owserver1 takes 6+ seconds, even long after the avahi-entry for owserver2 is gone until restarting owserver1.

Michael
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Sensors go Missing!

Mick Sulley — 2012-05-15T14:02:42

Hi,

I occasionally get a sensor, or sometimes 2 or 3, that 'go missing'!  I 
scan all of them 2 - 3 times per minute and at the moment there is one 
that has not been read for 12 hours.  It is a DS18S20.  If I look at 
directories I can see its directory, and read all of the files, address, 
alias, etc except for temperature, when I try it returns 'Could not open 
the file' 'Unexpected error: Unknown reason'

I have tried both the normal and uncached with the same result.  All 
sensors are powered.  I saw it happen with 3 sensors a couple of weeks 
back, out for a couple of days and then they came back again.

Any ideas what can cause this?

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Changing Number Format of Y-Axis on TemploggerdGraphs

Alex Shepherd — 2012-05-15T00:10:24

Hi Guys,

With temploggerd, can I specify a Y-Axis display mask like XX.X anywhere so
I get temperature labels with 1 decimal place?

When temperatures are not changing much, the graph auto-ranges in and
compresses the range such that the displayed labels have several instances
of each oC value without a single digit after the decimal place. I end up
with Y-Axis labels like:
20,20,20,21,21,21,21,21,22,22,22,22,22,23,23,23,23,23,24,24,24,24,24 (ie 5
labels all saying 21, 22, 23, 24 instead of 21.0, 21.2, 21.4, 21.6, 21.8,
22.0...

Regards

Alex Shepherd




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check_ow.py complaining about missing field

Doug Warner — 2012-05-08T23:52:12

I'm trying to get check_ow.py updated a little bit to accept a range of
acceptable values, but my first hurdle is getting the current version to work:

$ /usr/lib64/nagios/plugins/check_ow.py 192.168.0.1 4304
/1F.DD5105000000/main/28.9A46CE030000 -vv1
92.168.0.1:4304/1F.DD5105000000/main/28.9A46CE030000 - DS18B20
entryList: ['address', 'alias', 'crc8', 'errata', 'family', 'fasttemp', 'id',
'locator', 'power', 'r_address', 'r_id', 'r_locator', 'temperature',
'temperature10', 'temperature11', 'temperature12', 'temperature9', 'temphigh',
'templow', 'type']
sensorList: []
OW UNKNOWN - unknown field: temperature

My guess is my python (2.7.2) might not be using __getattr__ properly from the
ownet module.  Any ideas?

-Doug



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Hobby board LCD driver cannot write to lcd andsimultaneously read the PIO

Guy COLIN — 2012-05-05T23:29:37

Hello everybody,

2 years now I'm using owfs for monitoring home temperature and driving my
heating system. Everything is perfect. Big thanks to developers.
I have recently added to my network a Hobby board LCD driver. Following owfs man
pages I have no problem to write anything to the LCD, or to read the state of
the 3 input switches (the 3 first PIO's as per Hobby board design).
However my problem is that I cannot do this 2 things together:
To read the input switches state I read sensed.BYTE as per owfs man pages I must
first write 0 to PIO. And this is the problem as soon as I write something to
the PIO (0, 1, 8 or 255) the next write to the /LCD_H/message will fail to write
anything on LCD screen. I have try several things but cannot succeed. Obviously
I miss a re-init, printf "\x0C" >  /LCD_H/message doesn't help.
If anybody can help I would be happy!

Here is my script
The 2 functions are working, but not together.
To have the LCD correctly working I must comment this line
#echo 0 > $MYLCD/PIO.BYTE
if not 1 message on 2 isn't displayed.


#!/bin/bash

HeureDernierAffichage=0
COMPTEUR_AFFICHAGE=0
MYLCD=/tmp/1wire/29.1C9E09000000
LCD1="$MYLCD/LCD_H/screen"
LCD2="$MYLCD/LCD_H/message"
MESSAGE[1]="Bonjour Pirouette!                      Temp. Cave="
MESSAGE[2]="Bonjour Pirouette!                      Temp. Chaud="
MESSAGE[3]="Bonjour Pirouette!                      Temp. Entree="
MESSAGE[4]="Bonjour Pirouette!                      Temp. Ext="
MESSAGE[5]="Bonjour Pirouette!                      Temp. Server="


function DerouleAffichage   # scroll message 1 to 5
{
let TEMP_PASSE=`date +%s`-$HeureDernierAffichage  # message on LCD will change
every 5 seconds
echo -n "TEMP_PASSE=$TEMP_PASSE    "
if [ $TEMP_PASSE -gt 5 ]; then
  let COMPTEUR_AFFICHAGE=$COMPTEUR_AFFICHAGE+1
  if [ $COMPTEUR_AFFICHAGE -gt 5 ]; then let COMPTEUR_AFFICHAGE=1; fi # after
message 5 loop to message 1
  let HeureDernierAffichage=`date +%s`  
  printf "%s" "${MESSAGE[$COMPTEUR_AFFICHAGE]}$COMPTEUR_AFFICHAGE" > $LCD2
  echo 0 > $MYLCD/PIO.BYTE
fi
}

function TestAppuiBouton
{
  let REGISTRE=`cat $MYLCD/sensed.BYTE | sed -e "s/ //g"` 
  let "REGISTRE &= 7"  # Mask with AND keep 3 first bits
}


   # Initialise the display
  printf "\x0C" > $LCD1
  printf "1" > $MYLCD/LCD_H/clear
  printf "1" > $MYLCD/LCD_H/home

while [ 1 ]
do
  DerouleAffichage
  echo "COMPTEUR_AFFICHAGE=$COMPTEUR_AFFICHAGE   REGISTRE=$REGISTRE"
  sleep 0.5 
  TestAppuiBouton
done


Thanks 
--
Guy


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Ubuntu quickstart

Paul Alfille — 2012-05-03T23:06:30

Now that the newest version of Ubuntu (12/04) has owfs in the repository,
I've written a little description for getting it running.

http://owfs.org/index.php?page=quickstart-guide

I'd appreciate any feedback and corrections.

Paul Alfille
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owfs.py fail since update to 2.8p14

Mark Richards — 2012-04-30T16:06:38

Since updating to owfs-2.8p14, owfs.py fails:

      owfs.py -slocalhost:4304

     Traceback (most recent call last):
       File "/runtime/exec/owfs.py", line 38, in <module>
         tree( ow.Sensor( '/' ) )
       File "/usr/lib/python2.6/dist-packages/ow/__init__.py", line 169, 
in __init__
         self.useCache(self._useCache)
       File "/usr/lib/python2.6/dist-packages/ow/__init__.py", line 321, 
in useCache
         self._type    = self._connection.read('/system/adapter/name.0')
       File "/usr/lib/python2.6/dist-packages/ow/connection.py", line 
126, in read
         s.connect((self._server, self._port))
       File "<string>", line 1, in connect
     TypeError: coercing to Unicode: need string or buffer, NoneType found

If I do this (space after -s)

     owfs.py -s localhost:4304

I get:

     Traceback (most recent call last):
       File "/runtime/exec/owfs.py", line 37, in <module>
         ow.init( sys.argv[ 1 ] )
       File "/usr/lib/python2.6/dist-packages/ow/__init__.py", line 106, 
in init
         raise exNoController
     ow.exNoController


Perplexing.

The python support would be good to maintain in my setup.  Am I missing 
something here?


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Problems with PCSensor USB9097

Simon Barber — 2012-04-29T22:38:09

I am having trouble getting a PCSensor USB9097 to work. According to the 
archives I believe this is a ch-341 USB->Serial converter and a DS2480B 
combined in one.

I'm using Ubuntu 12.04 with a 3.4rc kernel. I installed owfs using:

sudo apt-get install owfs

Then disabled the services with:

sudo service owhttpd stop
sudo service owftpd stop
sudo service owserver stop

Then I plugged in the USB9097 - dmesg reports the following:

usb 6-1: new full-speed USB device number 3 using uhci_hcd
ch341 6-1:1.0: ch341-uart converter detected
usb 6-1: ch341-uart converter now attached to ttyUSB0

Next I run owhttpd:

sudo /opt/owfs/bin/owhttpd --debug -d /dev/ttyUSB0 -p 4444

I get the following output:

   DEBUG: ow_avahi_link.c:OW_Load_avahi_library(75) Avahi support: 
libavahi-client loaded successfully
   DEBUG: ow_avahi_link.c:OW_Load_avahi_library(77) Avahi library 
function found: avahi_client_errno
   DEBUG: ow_avahi_link.c:OW_Load_avahi_library(78) Avahi library 
function found: avahi_client_free
   DEBUG: ow_avahi_link.c:OW_Load_avahi_library(79) Avahi library 
function found: avahi_client_new
   DEBUG: ow_avahi_link.c:OW_Load_avahi_library(80) Avahi library 
function found: avahi_client_get_domain_name
   DEBUG: ow_avahi_link.c:OW_Load_avahi_library(81) Avahi library 
function found: avahi_entry_group_add_service
   DEBUG: ow_avahi_link.c:OW_Load_avahi_library(82) Avahi library 
function found: avahi_entry_group_commit
   DEBUG: ow_avahi_link.c:OW_Load_avahi_library(83) Avahi library 
function found: avahi_entry_group_is_empty
   DEBUG: ow_avahi_link.c:OW_Load_avahi_library(84) Avahi library 
function found: avahi_entry_group_new
   DEBUG: ow_avahi_link.c:OW_Load_avahi_library(85) Avahi library 
function found: avahi_entry_group_reset
   DEBUG: ow_avahi_link.c:OW_Load_avahi_library(87) Avahi library 
function found: avahi_service_resolver_free
   DEBUG: ow_avahi_link.c:OW_Load_avahi_library(88) Avahi library 
function found: avahi_service_resolver_new
   DEBUG: ow_avahi_link.c:OW_Load_avahi_library(89) Avahi library 
function found: avahi_service_browser_free
   DEBUG: ow_avahi_link.c:OW_Load_avahi_library(90) Avahi library 
function found: avahi_service_browser_new
   DEBUG: ow_avahi_link.c:OW_Load_avahi_library(102) Avahi support: 
libavahi-common loaded successfully.
   DEBUG: ow_avahi_link.c:OW_Load_avahi_library(104) Avahi library 
function found: avahi_simple_poll_free
   DEBUG: ow_avahi_link.c:OW_Load_avahi_library(105) Avahi library 
function found: avahi_simple_poll_get
   DEBUG: ow_avahi_link.c:OW_Load_avahi_library(106) Avahi library 
function found: avahi_simple_poll_loop
   DEBUG: ow_avahi_link.c:OW_Load_avahi_library(107) Avahi library 
function found: avahi_simple_poll_new
   DEBUG: ow_avahi_link.c:OW_Load_avahi_library(108) Avahi library 
function found: avahi_simple_poll_quit
   DEBUG: ow_avahi_link.c:OW_Load_avahi_library(109) Avahi library 
function found: avahi_strerror
    CALL: ow_parsename.c:FS_ParsedName_anywhere(95) path=[]
   DEBUG: owlib.c:SetupTemperatureLimits(79) Globals temp limits 0C 100C 
(for simulated adapters)
   DEBUG: ow_ds9097U.c:DS2480_initialize_repeatedly(265) Attempt #0 to 
initialize the DS9097U
   DEBUG: ow_ds9097U.c:DS2480_big_reset_serial(354) Send the initial 
reset to the bus master.
   DEBUG: ow_tcp_read.c:tcp_read(64) attempt 1 bytes Time: 5.000000 seconds
CONNECT: ow_tcp_read.c:tcp_read(110) TIMEOUT after 0 bytes
   DEBUG: ow_ds9097U.c:DS2480_configuration_read(432) wrong response (25 
not 00)
   DEBUG: ow_ds9097U.c:DS2480_set_baud_control(447) Failed first attempt 
at resetting baud rate of bus master /dev/ttyUSB0
   DEBUG: ow_tcp_read.c:tcp_read(64) attempt 1 bytes Time: 5.000000 seconds
CONNECT: ow_tcp_read.c:tcp_read(110) TIMEOUT after 0 bytes
   DEBUG: ow_ds9097U.c:DS2480_configuration_read(432) wrong response (95 
not 00)
   DEBUG: ow_ds9097U.c:DS2480_set_baud_control(452) Failed second 
attempt at resetting baud rate of bus master /dev/ttyUSB0
   DEBUG: ow_tcp_read.c:tcp_read(64) attempt 1 bytes Time: 5.000000 seconds
CONNECT: ow_tcp_read.c:tcp_read(110) TIMEOUT after 0 bytes
   DEBUG: ow_tcp_read.c:tcp_read(64) attempt 1 bytes Time: 5.000000 seconds
CONNECT: ow_tcp_read.c:tcp_read(110) TIMEOUT after 0 bytes
   DEBUG: ow_ds9097U.c:DS2480_configuration_read(432) wrong response (25 
not 00)
   DEBUG: ow_ds9097U.c:DS2480_set_baud_control(447) Failed first attempt 
at resetting baud rate of bus master /dev/ttyUSB0
   DEBUG: ow_tcp_read.c:tcp_read(64) attempt 1 bytes Time: 5.000000 seconds
CONNECT: ow_tcp_read.c:tcp_read(110) TIMEOUT after 0 bytes
   DEBUG: ow_ds9097U.c:DS2480_configuration_read(432) wrong response (95 
not 00)
   DEBUG: ow_ds9097U.c:DS2480_set_baud_control(452) Failed second 
attempt at resetting baud rate of bus master /dev/ttyUSB0
   DEBUG: ow_tcp_read.c:tcp_read(64) attempt 1 bytes Time: 5.000000 seconds
CONNECT: ow_tcp_read.c:tcp_read(110) TIMEOUT after 0 bytes
   DEBUG: ow_tcp_read.c:tcp_read(64) attempt 1 bytes Time: 5.000000 seconds
CONNECT: ow_tcp_read.c:tcp_read(110) TIMEOUT after 0 bytes
   DEBUG: ow_ds9097U.c:DS2480_configuration_write(416) wrong response 
(76 not 44)

What am I doing wrong, or is this a bug?

Simon

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VAD voltage read DS2438

lapa leves — 2012-04-27T19:50:54

Hello,

I'm a very satisfied user of owfs for temperature measurements. Yet, I would
need now to read voltages and DC currents (1-15A range). For the later I got a
DS2438 and a Devicecraft hall-effect sensor. The resulting ~1A< at >12V sensitivity
would be satisfactory for me.

So, I have attached the DS2438, and the hall sensor to it. I have checked and
the sensor delivers the expected 0.01V offset when 0.5A flows. I have got also
the folder for the 26.x device shown in my Ubuntu 10.04 machine when owfs is
executed.

Now I'm totally lost as a noob. I expected this would be simple like for the
temp sensors, just to read files via "cat". But this seems to be more tricky,
and after a lot of searching I still did not find any step-by-step guide how to
get VAD measurements.

I would appreciate any information directing me to the desired result. I'm very
excited if this will work out.

Many thanks,

lapa

PS: Just for the sake of record: for measuring 12V DC currents I used a
dismantled car fuse, and a DS18S20 pushed onto the "hot wire" part so far. In a
rather permanent temperature environment this showed an around 0.5A resolution.
Of course the offsets have a delay and a heat up-cool & down curve, but the
integral fits and the offsets can be calibrated if necessary. Now I would try
the real thing.


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threat landscape has changed and how IT managers can respond. Discussions 
will include endpoint security, mobile security and the latest in malware 
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/