[mh] easy/cheap way to get switch closure into MH?

[JimMH <jsk...@sb...>]

Looking for an easy way to get switch closures to give me an audible signal
when closed and provide input to mh.  Things I am considering:

- input to handshake lines of serial port

- PIC or AVR digital I/O to serial connection, possibly through a ddwrt
router (have found several similar things on the net that look to be easily
adapted).  

I recently picked up a driveway sensor.  I might hook it to unused back door
contacts of the doorbell for now but long term I would like to hook it to
mh.  Have thought of having mh do the doorbell function as well by playing
audio files.  

Leaning towards the PIC/AVR as this would allow future expansion to other
things - analog inputs, etc.


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