Cedric Chang wrote:
> for a home project, I am looking for ZigBee modules that already  
> inter-operate and have node modules that have digital I/O and analog  
> I/O.
> I looked at ArchRock.com. they seem set up for large OEM buyers.
> Digi.com looked like a possibility. Their digital I/O modules seemed  
> expensive.  The $21 module looked like the right price.  

These would be the XBees.  I've used them for a number of projects, and 
I like them.

> I could not  
> figure out whether the module had I/O capability the could be  
> controlled through the network mesh.  

Yes, you can set it up so that one module's I/Os mirror another's.  So, 
set a pin on the local node, and it's set on the remote node.

> There was some mention of  
> adding your own code??

Yup, search recent posts for 'XBee' to see a bit of discussion of that.

> My first unit to be controlled is a analog clock from Walmart for  
> $3.99.  I removed the crystal controlled stepper motor and added a  
> cell phone vibrator motor so I could run the clock hands forward or  
> reverse at any speed I wanted.  The scheme works but all the control  
> i have added so far is human hand operated ( reverse the motor  
> wires ) direction control and human hand operated ( touch the battery  
> with the wire ) PWM control.
> 
> I want a clock that I can control wirelessly.

Seems like a good solution for that.
-- 
Timothy J. Weber
http://timothyweber.org
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