Date: Mon, 4 Jul 2011 22:32:51 -0300 From: Luiz Otavio O Souza <lists.br@gmail.com> To: Achilleas Mantzios <achill@matrix.gatewaynet.com> Cc: freebsd-multimedia@freebsd.org, freebsd-hardware@freebsd.org Subject: Re: FreeBSD and controlling an alarm via relay Message-ID: <A2C3C492-388A-4D6F-8768-461445264514@gmail.com> In-Reply-To: <201107041339.22470.achill@matrix.gatewaynet.com> References: <201107041339.22470.achill@matrix.gatewaynet.com>
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On Jul 4, 2011, at 7:39 AM, Achilleas Mantzios wrote: > Hello, sorry for the cross-post but i believe this question might seat in both lists. > I am the guy who had the done the old 1.23.3 zoneminder port some years ago, and i am thinking of installing/testing > the new 1.24.4 port, submitted by bsam@FreeBSD.org. > Besides the basic functions, i am thinking of re-using some old techniques by which i controlled > the home alarm via a NC/NO circuit (basically it was an enhanced door contact), > driven by an old zyXel modem, which in turn was driven by a small perl program driving the com port, and > which was called by a deamon reading zoneminder shared memory info directly. > That way i could trigger the alarm system getting into alarm state, whenever zoneminder detected motion, > in a fully controlled and programmatic way. > > Now i am thinking of re-doing this, a little bit more modern, if possible. I was thinking of some relay board > (instead of the old modem), possibly ethernet controlled (to get rid of all the obsolete com port programming), > and such. Also i will scrap the old NO/NC solution (circuit embded in the door contact), and i wil use instead a new > dedicated wireless transimter i bought (same brand as the alarm system), which is also NC/NO and receives > two inputs and corresponds to two zones. So i am thinking of assigning 2 cameras as two disctinct zones > in the alarm system. > > That is the rough idea. What would you guys have to recommend (regarding the relay?). I do not plan to use > this relay for power/lights on/off and such, at this stage it will function solely to drive the alarm transimtter, > (which in turn will drigger an alarm to the central alarm control panel) If you want to go ethernet -> gpio, i think the routerstation (or routerstation pro) is one good option. The routerstation (not the pro version) works with 12v~24v (12v is kind common for alarm systems) and has 7 available GPIO pins (which works as inputs and outputs - you can connect relays, switches, leds, lcds, i2c and spi devices). GPIO pins can be easily controlled from userland with gpioctl(8) or with a small C program with the appropriate ioctl()s (or even using the led(4) framework). Please take a look at http://wiki.freebsd.org/FreeBSD/mips/UBNT-RouterStation for more detailed information. Both boards works _really_ fine with -current. Cheers, Luiz
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