How about transmit-only UDP bit-banged from an AVR:

http://cesko.host.sk/IgorPlugUDP/IgorPlug-UDP%20%28AVR%29_eng.htm

Beware of intrusive ads on the page.

Bob

On Fri, Dec 20, 2013, at 09:54 PM, Justin Richards wrote:
> For some time I have been pondering a means of leveraging off Ethernet
> based networks for the transport of very simple information updates.
>=20
> For example a very small (about the size of a Cat5 Socket) device that is
> remotely powered that chirps out temperature readings.
>=20
> Rather than implementing some sort of modified TCP/IP stack which is very
> resource intensive, I have been considering a means where a PIC chip
> simply
> bangs out the required Manchester encoded bit stream to appear to be a
> valid Ethernet packet at 10base-T.


--=20
http://www.fastmail.fm - IMAP accessible web-mail

--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.