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.
Software: http://excamera.com/articles/21/parallel.html Hardware: http://www.dakeng.com/relay.htm Fancy hardware: http://www.electronickits.com/kit/complete/elec/ck1601.htm Tim On Jul 5, 2011, at 9:30 AM, Achilleas Mantzios wrote: > Στις Tuesday 05 July 2011 16:10:59 γράψατε: >> On Mon, 4 Jul 2011, Achilleas Mantzios wrote: >> >> [snip] >> >>> I was thinking of some relay board (instead of the old modem), >>> possibly ethernet controlled >> >> This box has relays and GPIO available via ethernet. It's probably >> overkill for your application, but it's well made and easy to use: >> >> http://www.extron.com/product/product.aspx?id=ipltcr48&s=0 >> > > That is too big for my application, thanx anyway. > Most probably i'll go for something cheaper like this one > http://www.ebay.co.uk/itm/USB-Eight-Channel-Relay-Board-RS232-Serial-Controlled-/110710346488?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item19c6d9d2f8 > > Could i use the ucom driver to talk to the USB device like a normal serial > 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) > or > 255 1 0 (DEC) > > could i be able to specify those over ucom? > do you know any application, perl library, utility or just a guide for > standard C serial port programming? > > 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, but > 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; > > my $v = new Modem::Vgetty; > > $v->device('DIALUP_LINE'); > $v->send("ATH1"); > sleep(5); > $v->send("ATH0"); > > 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. >> > > > > -- > Achilleas Mantzios > _______________________________________________ > [email protected] mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-multimedia > To unsubscribe, send any mail to "[email protected]" _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hardware To unsubscribe, send any mail to "[email protected]"
