RE: Re: Interfacing PIR's

["Dan Hoehnen" <dhoehnen@xxxxxxx>]

> -----Original Message-----
> From: Henderson, Darren [mailto:Darren.Henderson@xxxxxxx]
> Sent: Thursday, August 10, 2000 7:39 AM
> To: 'ukha_d@xxxxxxx'
> Subject: RE: [ukha_d] Re: Interfacing PIR's
>
>
>
> > > Does anyone have any ideas on how I could interface my alarm
inputs
> > to
> > > my PC so I can inform Homeseer about the PIR states, of
course this
> > should
> > > be in an inexpensive and reliable way :o)
> >
> > I built an ISA digital I/O board from a Maplins kit and used that
to
> > interface to my alarm control panel; it has proved very reliable.
> > You have to know enough electronics to know how to interface to
TTL
> > circuitry though...
> >
> > Patrick
>
> This is exactly the sort of thing I was thinkng off, a sort of project
kit
> from Maplins etc...
>
> Any more details Patrick ?
>
> Send them to me directly if no-one else wants the info.

What version of Windows will you be using this I/O card on?  I ask because
NT and 2000 will require a device driver for you to access the ports.  If
using one of these OS's, make sure it comes with a driver for NT and/or
2000.

Will you write your own program to inform HS of the status of each input?
Or will HS support reading from an I/O address?

If you can write your own program, and need to support NT or 2000, you
might
want to consider one of the I/O devices that talks over a serial port. 
This
will not require drivers for NT and 2000.  Of course, now you need a free
serial port.

Just some ideas.

Dan


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