Date: Wed, 6 Aug 2003 15:23:41 +0200 (CEST) From: hm@kts.org (Hellmuth Michaelis) To: patpro <patpro@patpro.net> Cc: freebsd-hardware@freebsd.org Subject: Re: temperature acquisition on FreeBSD Message-ID: <20030806132341.73E35A5@bert.int.kts.org> In-Reply-To: <D8C40B16-C7EB-11D7-BB40-003065CDEB78@patpro.net>
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patpro wrote: > >> What I would do today is continue to use the Dallas Semiconductor > >> temperature probe devices and just drive them from the Dallas > >> 1-wire to RS-232 serial port adapter. You'll need some additional > >> software to discover, address, fetch and convert measurements from > >> each of the probes as compared to the Spiderplant box. > >> > >> As far as software, you can start with /usr/ports/comms/mlan or > >> /usr/ports/comms/mlan3 to talk to the adapter. > > > If I understand well, you're talking about this device : > > https://store.ibutton.com/cgi-bin/ncommerce3/ > ProductDisplay?prrfnbr=2531&prmenbr=776 > > But it looks like one can only plug 1 probe, and by the way, I can't > find simple temp probes. > The starter kit looks good > (http://www.ibutton.com/ibuttons/1921Kit.html) but the DS9097U-S09 has > no addressable 1-Wire chip onboard. And it seems it uses TMEX driver, > so I'm not sure mlan or mlan3 freebsd ports can read data from it. I am using DS9097U-009 devices together with several DS1820 (in a bus topology) at several places to monitor temperature of rooms and machines. All you need is a DS9097U-009, one or more DS1820, twisted pair wiring and the mlan or better the mlan3 port on a FreeBSD machine. See also http://www.kts.org/temp.html http://www.kts.org/hm/download/mtempd.tar.gz and http://www.kts.org/hm/hm-links-1wire.html hellmuth -- Hellmuth Michaelis Hamburg, Europe hm\at\kts.org www.kts.org a duck is like a bicycle because they both have two wheels except the duck (tl)
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