I can't try , because now when i start owfs, i've got this message : DEFAULT: ow_usb_msg.c:DS9490_open(263) Opened USB DS9490 bus master at 5:2. DEFAULT: ow_usb_cycle.c:DS9490_ID_this_master(182) Set DS9490 5:2 unique id 0x00 (no devices at all)
My system is Ubuntu 10.04 LTS, 2.6.32-24-generic-pae owfs version 2.8.p2 and in my mount point i don't have device. just this : bus.0 settings statistics structure system uncached thank. > 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 > >> > accelerate your shift to cloud computing. > >> > http://p.sf.net/sfu/novell-sfdev2dev > >> > _______________________________________________ > >> > Owfs-developers mailing list > >> > [email protected] > >> > https://lists.sourceforge.net/lists/listinfo/owfs-developers > >> > > >> > >> > >> > >> > >> ------------------------------------------------------------------------------ > >> Start uncovering the many advantages of virtual appliances > >> and start using them to simplify application deployment and > >> accelerate your shift to cloud computing. > >> http://p.sf.net/sfu/novell-sfdev2dev > >> _______________________________________________ > >> Owfs-developers mailing list > >> [email protected] > >> https://lists.sourceforge.net/lists/listinfo/owfs-developers > >> > > > > > > > [ (pas de nom de fichier) (0.3 Ko) ] > [ (pas de nom de fichier) (0.2 Ko) ] ------------------------------------------------------------------------------ Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
