temperature acquisition on FreeBSD

[Hellmuth Michaelis]

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)