From owner-freebsd-multimedia@FreeBSD.ORG Tue Jul 5 14:30:12 2011 Return-Path: Delivered-To: freebsd-multimedia@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id E411B106564A; Tue, 5 Jul 2011 14:30:12 +0000 (UTC) (envelope-from achill@matrix.gatewaynet.com) Received: from smadev.internal.net (host3.dynacom.ondsl.gr [62.103.35.211]) by mx1.freebsd.org (Postfix) with ESMTP id 3EA438FC1B; Tue, 5 Jul 2011 14:30:11 +0000 (UTC) Received: from smadev.internal.net (localhost.internal.net [127.0.0.1]) by smadev.internal.net (8.14.2/8.14.2) with ESMTP id p65EU8Lu001113; Tue, 5 Jul 2011 17:30:08 +0300 (EEST) (envelope-from achill@matrix.gatewaynet.com) Received: from localhost (localhost [[UNIX: localhost]]) by smadev.internal.net (8.14.2/8.14.2/Submit) id p65EU3TC001112; Tue, 5 Jul 2011 17:30:03 +0300 (EEST) (envelope-from achill@matrix.gatewaynet.com) From: Achilleas Mantzios Organization: Dynacom Tankers Mgmt To: Chris Hill , freebsd-hardware@freebsd.org, freebsd-multimedia@freebsd.org Date: Tue, 5 Jul 2011 17:30:03 +0300 User-Agent: KMail/1.9.7 References: <201107041339.22470.achill@matrix.gatewaynet.com> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Message-Id: <201107051730.03784.achill@matrix.gatewaynet.com> Cc: Subject: Re: FreeBSD and controlling an alarm via relay X-BeenThere: freebsd-multimedia@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Multimedia discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 05 Jul 2011 14:30:13 -0000 =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 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-Contro= lled-/110710346488?pt=3DUK_BOI_Electrical_Components_Supplies_ET&hash=3Dite= m19c6d9d2f8 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: =46F 01 00 (HEX)=20 or=20 255 1 0 (DEC) could i be able to specify those over ucom?=20 do you know any application, perl library, utility or just a guide for stan= dard 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 t= his 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 =3D 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. >=20 =2D-=20 Achilleas Mantzios