I cut vsens link,
i change usb port and i try i , it's ok, i can read VAD
now i start owfs (owfs -u --allow_other /mnt/1wire ), i can read mount point.
and when i start owserver an owhttpd, their is non device in mount point.
see my script :
#!/bin/sh
#
# Control owfs as a Service
#
# Source function library.
#. /etc/rc.d/init.d/functions
prog=owfs
prog_fs=owfs
prog_serv=owserver
prog_http=owhttpd
prog_gest=owgest
PATH=/bin:/usr/bin:/sbin:/usr/sbin
DAEMON_FS=/usr/bin/$prog_fs
PIDFILE_FS=/var/run/$prog_fs.pid
DAEMON_SERV=/usr/bin/$prog_serv
PIDFILE_SERV=/var/run/$prog_serv.pid
DAEMON_HTTP=/usr/bin/$prog_http
PIDFILE_HTTP=/var/run/$prog_http.pid
CONF=/etc/fuse.conf
OWFS_MODULE="fuse"
SCRIPT=/home/ow/script
# Arguments to $prog_fs
#
MOUNT_POINT="/mnt/1wire/"
ARGS="--allow_other -C --write -u "
# mount point exist ?
#
if [ ! -d ${MOUNT_POINT} ]
then
mkdir -p "${MOUNT_POINT}"
fi
test -x $DAEMON_FS || exit 0
case "$1" in
start)
echo -n "Starting $prog_fs"
#start-stop-daemon --start --quiet --pidfile $PIDFILE_FS --exec $DAEMON_FS --
$ARGS $MOUNT_POINT
if [ -d ${MOUNT_POINT} ]
then
modprobe "${OWFS_MODULE}"
"${DAEMON_FS}" -u --allow_other "${MOUNT_POINT}"
fi
echo "."
wait 10
echo -n "Starting $prog_serv"
$DAEMON_SERV $ARGS -p 3001
echo "."
wait 10
echo -n "Starting $prog_http"
$DAEMON_HTTP $ARGS -s localhost:3001 -p 8086
echo "."
wait 10
;;
stop)
echo -n "Stopping $prog_http"
killall $DAEMON_HTTP
echo -n "Stopping $prog_serv"
killall $DAEMON_SERV
echo -n "Stopping $prog_fs"
umount $MOUNT_POINT
echo "."
;;
restart)
sh $0 stop
sh $0 start
;;
*)
echo "Usage: /etc/init.d/$prog {start|stop|restart}"
exit 1
;;
esac
exit 0
# end of $prog.init
=================================================
tanks
> Message du 19/09/10 20:52
> De : "Paul Alfille"
> A : "OWFS (One-wire file system) discussion and help"
> Copie à :
> Objet : Re: [Owfs-developers] Read VAD on DS2438
>
> Ok I tried a real device, a HIH3600-based humidity sensor:
>
p...@paul-desktop:~$ DS2438=`/opt/owfs/bin/owdir | grep "/26"` ;
VOLTS=`/opt/owfs/bin/owdir $DS2438 | grep -i "/V"` ; for v in $VOLTS ; do echo
"$v = `/opt/owfs/bin/owread $v`" ; done
/26.3D3A15000000/VAD = 2.26
/26.3D3A15000000/VDD = 4.62
/26.3D3A15000000/vis = 0
>
So the VAD value is not pinned at 0. My guess is that Marcus Priesch's
observation about your circuit should be investigated. Can you report back your
findings?
>
Paul Alfille
>
On Fri, Sep 17, 2010 at 8:11 PM, Paul Alfille
wrote:
>
VAD measuring mode (vs Vdd) is done automatically when VAD is requested. I'm
able to read humidity values, which required VAD, but I'll test further
>
>
On Fri, Sep 17, 2010 at 3:25 PM, Marcus Priesch wrote:
>
Hi,
>
> just a qiuck look over the datasheet and your schematics:
>
> i am not sure if you need to put Vsens- to ground ?
>
> and you have to put the device into VAD measuring mode ... however i am
> not sure how to do this via owfs ...
>
> maybe this helps ...
>
> gegards,
> marcus.
>
> Am Mittwoch, den 15.09.2010, 11:09 +0200 schrieb Ghislain FOURNIER:
>
> Hi,
> >
> > I can't read VAD on DS2438, with owfs.
> >
> > my schematic : http://www.fournier-family.com/images/sch_electronique.gif
> >
> > VAD en VSS value is always 0
> >
> > can y help me ?
> >
> > best regard.
> >
> > Ghislain.
> >
> >
> >
> > ------------------------------------------------------------------------------
> > Start uncovering the many advantages of virtual appliances
> > and start using them to simplify application deployment and
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> >
>
>
>
> ------------------------------------------------------------------------------
> Start uncovering the many advantages of virtual appliances
> and start using them to simplify application deployment and
> accelerate your shift to cloud computing.
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>
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>
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and start using them to simplify application deployment and
accelerate your shift to cloud computing.
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