Date: Wed, 6 Jul 2011 11:24:38 +0300 From: Achilleas Mantzios <achill@matrix.gatewaynet.com> To: freebsd-multimedia@freebsd.org, freebsd-hardware@freebsd.org Subject: Re: FreeBSD and controlling an alarm via relay Message-ID: <201107061124.38593.achill@matrix.gatewaynet.com> In-Reply-To: <295D8D24-CAE4-4EB6-BCF1-EEE7B8623D85@lns.com> References: <201107041339.22470.achill@matrix.gatewaynet.com> <201107051730.03784.achill@matrix.gatewaynet.com> <295D8D24-CAE4-4EB6-BCF1-EEE7B8623D85@lns.com>
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thanx! very interesting! =CE=A3=CF=84=CE=B9=CF=82 Tuesday 05 July 2011 20:43:10 =CE=B3=CF=81=CE=AC= =CF=88=CE=B1=CF=84=CE=B5: > Why not use the parallel port? Have one of its pins drive a relay. You= may need to put a transistor in front of the relay. >=20 > Software: > http://excamera.com/articles/21/parallel.html >=20 > Hardware: > http://www.dakeng.com/relay.htm >=20 > Fancy hardware: > http://www.electronickits.com/kit/complete/elec/ck1601.htm >=20 > Tim >=20 > On Jul 5, 2011, at 9:30 AM, Achilleas Mantzios wrote: >=20 > > =CE=A3=CF=84=CE=B9=CF=82 Tuesday 05 July 2011 16:10:59 =CE=B3=CF=81=CE= =AC=CF=88=CE=B1=CF=84=CE=B5: > >> On Mon, 4 Jul 2011, Achilleas Mantzios wrote: > >>=20 > >> [snip] > >>=20 > >>> I was thinking of some relay board (instead of the old modem),=20 > >>> possibly ethernet controlled > >>=20 > >> This box has relays and GPIO available via ethernet. It's probably=20 > >> overkill for your application, but it's well made and easy to use: > >>=20 > >> http://www.extron.com/product/product.aspx?id=3Dipltcr48&s=3D0 > >>=20 > >=20 > > That is too big for my application, thanx anyway. > > Most probably i'll go for something cheaper like this one=20 > > http://www.ebay.co.uk/itm/USB-Eight-Channel-Relay-Board-RS232-Serial-Co= ntrolled-/110710346488?pt=3DUK_BOI_Electrical_Components_Supplies_ET&hash= =3Ditem19c6d9d2f8 > >=20 > > Could i use the ucom driver to talk to the USB device like a normal ser= ial device, via /dev/cua*** ? > > The above link says one needs to talk to the relay with: > > 8 Data, 1 Stop, No Parity,Baud rate : 9600 > > and the commands look like: > > FF 01 00 (HEX)=20 > > or=20 > > 255 1 0 (DEC) > >=20 > > could i be able to specify those over ucom?=20 > > do you know any application, perl library, utility or just a guide for = standard C serial port programming? > >=20 > > i have used mgetty/vgetty in the past to control some modems. > > I do not know if there any fancier methods to access the serial port, b= ut this is how i used to do it, back in 7.* > > /usr/local/bin/vm shell -l cuad1 -S onhook_offhook.pl > > where onhook_offhook.pl reads like: > > #!/usr/bin/perl > > # > > use Modem::Vgetty; > >=20 > > my $v =3D new Modem::Vgetty; > >=20 > > $v->device('DIALUP_LINE'); > > $v->send("ATH1"); > > sleep(5); > > $v->send("ATH0"); > >=20 > > if i could speak directly with e.g. "255 1 0" like > > $v->send("255 1 0"); > > that would be awesome... > > i guess i will have to try it out. > >> I'd also look at manufactureres such as Moxa and LANtronics. > >>=20 > >=20 > >=20 > >=20 > > --=20 > > Achilleas Mantzios > > _______________________________________________ > > freebsd-multimedia@freebsd.org mailing list > > http://lists.freebsd.org/mailman/listinfo/freebsd-multimedia > > To unsubscribe, send any mail to "freebsd-multimedia-unsubscribe@freebs= d.org" >=20 >=20 =2D-=20 Achilleas Mantzios
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