RE: Re: Interfacing With Ethernet

["Iain Goodhew" <I.C.B.Goodhew@xxxxxxxxxxxxx>]

>As far as xPL (and xAP) are concerned it would just need to be able to
send
>a UDP packets out on a given port number and rely any UDP packets on
that
>port number back to the connected device.

>The main form factor I think would be a building block to a micro
>controller like a PIC so the pic could send the ethernet block a serial
>message and receive back a serial message for incoming messages. Any
idea
>of how big the device would be or the componet cost?

Yes I agree a cheap Ethernet -> serial device is needed and don't see
this being a problem. Other idea's would be Ethernet to TW523/TW7223
allowing X10 -> Ethernet interface, and as Matt says an Ethernet to 1
wire interface would also be useful.

I have just dug out my test Ethernet board. I will post a picture so you
can see what I'm talking about. But essentially it consists of:
1 RJ45 socket
1 ethernet transformer
1 crystalLAN CS8900
2 led's
1 crystal
some resistors/caps

Size 6cm x 4 cm

This was wired to a PIC 16F877 via 8 bit databus + 8 other control
wires, power + ground. I have to say it's a bit out or date now as the
Ethernet transformer + led's are now available all built into the
socket, hence 1 off component cost would approx be:

Realtek Ethernet chip   	=A35.50
RJ45 socket + transformer	=A34.95
Pic	16f877			=A36.77
PCB 		(depends too much on quantity)

I have to say these prices are just an example; I haven't necessarily
sourced the cheapest.

Iain



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