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Wake on LAN

Wake on LAN

Wake on LAN

(OP)
Hello,

I need some ideas on how to have have a Mini ITX computer send out a "power on" signal to my other instrument.  I want the Ethernet to communicate with the computer and tell it to send a signal to a auxillary power supply to turn it on.

Thanks,

RE: Wake on LAN

Hi-

There are a couple of things that come to mind.  Maybe
none of these would be any good but at least it's a
start.

1. Have the computer other than the ITX one "hang a ping
   on the ITX machine.  After the O/S boots, it will start
   replying to the ping and the "other computer" can sense
   that the ping has been returned and can take the
   appropriate action.

2. Have the ITX machine send an email to the "other
   computer" in the startup scripts.  The "other computer"
   can poll for email (say on an account that is dedicated
   to that one function.  When the email is seen, again
   the appropriate action can be taken.

3. Roll your own code to send a UDP datagram that can
   be invoked by the ITX startup script.  You will have
   to design a "listener service" on the "other computer"
   for a port to receive the datagram.  It need not be
   much.  Some dedicated port on the inetd listener
   file that will get invoked when the dedicated port is
   opened.

4. Use Remote Procedure Call (RPC).  This is a unix/linux
   method of having two machines communicate. Again, you
   will have to generate some code to do this. This might
   be more effort than it's worth.

5. Simple Network Management Protocol (SNMP) could
   also be used.  The ITX machine could send
   an "alert" to the "other computer".  Again, this might
   be too much effort, but it's your call.

Well, these are the things that come immediately to mind.
I think that I would work with suggestion 1 or 2 as the
easiest to implement.

Best of luck!

  Cheers,

   Rich S.

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