>Anyone know of any system that does this?  Preferably DIY as I can use
a change of project for a bit.  Or I could build one, but I'm not too
familiar with any type of ethernet/internet/IP communications (from a
microcontroller standpoint).  Perhaps I can do this easily with an
arduino, ethernet shield, LCD, and keypad.

I have considered just that.  I modified the code of a pic-maxi approx
AU$250 that now sends a coded message to my server when any status has
changed.  My server then decode the message and sends an email, sms,
facebook update (working on that one) depending on the type of event.
I also implemented 8 crons jobs several count up/dn counters and
controls the garden reticulation.  I can turn the water off and on
remotely and open the garage door (yet to be wired).

In my setup the server and controller are at the same premises but if
they were remotely located then the server could periodically poll the
device or the device could periodically send heatbeat updates and the
server could email, sms etc in the event that comms have failed for
whatever reason.

Recently I obtained a different Ethernet embedded controller that has
5 relays outs, several opto in and several general io for AU$150.  I
have modified that code to send udp messages for inter device comms.
There is some sample code out there that enables them to send emails
direct.

Also the cheap foscam type cameras for approx AU$90 can send emails
and ftp when it detects motion or state change on a single input pin.
They also has a single relay out with PAN and Tilt.  They also can be
used to monitor audio and able to accept audio.
--=20
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