Re: Interfacing With Ethernet

["matt_miles_uk" <m_miles@xxxxxxxxxxxxxxxx>]

even though those prices are 'rough estimates' they still add up to=20
be less than a singe Xport if I am correct... i'm not condemning the=20
mss100 but if a cheaper alternative can be built (and a supply=20
maintained) surely thats a good thing?  As peoples needs grow being=20
able to source these is, i'm sure, only going to get harder...

Matt

--- In ukha_d@xxxxxxx, "Iain Goodhew"
<I.C.B.Goodhew@r...>=20
wrote:
>=20
>=20
>=20
> >As far as xPL (and xAP) are concerned it would just need to be=20
able to
> send
> >a UDP packets out on a given port number and rely any UDP
packets=20
on
> that
> >port number back to the connected device.
>=20
> >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=20
serial
> >message and receive back a serial message for incoming
messages.=20
Any
> idea
> >of how big the device would be or the componet cost?
>=20
> Yes I agree a cheap Ethernet -> serial device is needed and
don't=20
see
> this being a problem. Other idea's would be Ethernet to=20
TW523/TW7223
> allowing X10 -> Ethernet interface, and as Matt says an Ethernet=20
to 1
> wire interface would also be useful.
>=20
> I have just dug out my test Ethernet board. I will post a picture=20
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
>=20
> Size 6cm x 4 cm
>=20
> 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=20
the
> Ethernet transformer + led's are now available all built into the
> socket, hence 1 off component cost would approx be:
>=20
> Realtek Ethernet chip   	=A35.50
> RJ45 socket + transformer	=A34.95
> Pic	16f877			=A36.77
> PCB 		(depends too much on quantity)
>=20
> I have to say these prices are just an example; I haven't=20
necessarily
> sourced the cheapest.
>=20
> Iain