--- Original Message -----
From: "OlePetter Roenningen" <olepr@ONLINE.NO>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Monday, October 23, 2000 1:10 PM
Subject: [PIC]: Ethernet connectivity


> Hello all
>
> I am considering to make a temperature probe using a PIC microcrontroller
of some sort. This probe should be able to 'speak' SNMP, both GET and SET..
I have seen a few products claiming to add TCP/IP support to uC's, but most
of them uses RS232 to a modem or something else. What I'd really like is a
device with ethernet, capable of getting av IP via DHCP, and serve SNMP
request. Anyone ever done this, or have links to something even remotely
similar?
>
> I guess it would neet to support 802.2, ARP, DHCP, IP, UDP, SNMP and
>possibly DNS.




Have a look at the HelloDevice from www.sena.com. I think that does most of
what you want in a very small footprint. Not the cheapest answer - but it is
a ready-made solution with very little coding required.

There's also a new Scenix Virtual Peripheral
http://www.scenix.com/virtual/index.html which is Ethernet connected, though
I don't know anything else about that one yet. They sell an Ethernet
development kit for 99USD.
If anyone has any experience with/comments on this I'd be very interested to
hear.

iReady have just announced an Ethernet version of their Internet Tuner
technology as used in Seiko's iChip, but silicon isn't expected until Q1
next year.

www.embeddedethernet.com is a simple ethernet interface which might give you
a few ideas. I think you'd need to write quite a bit of code yourself if you
want an all-singing version though.

I don't have the URL but both Circuit Cellar and Nuts'n'Volts magazines have
published projects based on bodging an ISA NIC, I think using an Atmel
processor, but the principle holds good. Again you'd end up writing a lot of
protocol yourself.

HP have the cute-but-overpriced BFoot module at 350USD in small quantities
http://www.hpie.com/

If you want to roll your own then there's the Crystal CS8900A device
http://www.cirrus.com/design/products/overview/index.cfm?ProductID=46  and
the Realtek RTL8019AS both of which are relatively easy to interface to a
microcontroller.


Hope some of this helps. As you might have guessed, I've been looking into
an Ethernet solution for one of my products recently.


Cheers,

Andy.

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