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CaptainBoing

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Joined: 07/09/2016
Location: United Kingdom
Posts: 1985

Posted: 09:29pm 14 Apr 2017

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Recent discussions here have fired up my thinking around ethernet interfaces for microcontrollers. I have planned to do something here for a few years but never really got round to it.

I have working solutions with WiFi interfaces (ESP8266) and here I am specifically interested in wired solutions, but any discussion is good.

There are loads of libraries around for various devices, arduino stuff, Great Cow Basic, but I want to avoid libraries if I can (relies to much on others work which reduces "tweakability").

What experience do others have with hand-cranking this?

Also, the Microchip ENC28J60 is a nice device which i favoured ages ago but looking at the Wiznet devices, I think they offload much of the really horrible protocol contruction on top of PHY - any experiences with this?

Currently I am favouring the W5100 as it is both competent and cheap and the W5500 handles TCP SYN slightly differently which can result in aborted conect-ins. http://wizwiki.net/forum/viewtopic.php?t=1382 Any discussions to be had here?

Edited by CaptainBoing 2017-04-16

matherp
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Joined: 11/12/2012
Location: United Kingdom
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Posted: 09:46pm 14 Apr 2017

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I've done this in the past using a ethernet uart with this sort of coding

jman

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Joined: 12/06/2011
Location: New Zealand
Posts: 711

Posted: 09:54pm 14 Apr 2017

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hi
Have you seen this thread W5100

Regards
Jman

Grogster

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Joined: 31/12/2012
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Posted: 10:16pm 14 Apr 2017

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I use the WizNet 107SR module in my systems. This device has a nice easy GUI config utility, and it will search for and find the module on the network at the click of a button, and you can update the module settings via that same network connection.

Not as cheap as the 5100 eBay clone though, but I prefer the genuine article these days - I have had too many stressful encounters with fluffy cloned stuff.

Configured for console baud-rate, you can easily connect to the MM console from anywhere on your network, or anywhere on the WAN with the correct port settings in the module, and suitable port-forwarding in the ADSL router.

Smoke makes things work. When the smoke gets out, it stops!

CaptainBoing

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Joined: 07/09/2016
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Posts: 1985

Posted: 12:53am 15 Apr 2017

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Thanks for the replies chaps.

why did none of this stuff come up when I searched?

It seems that this has all been done before - plenty to think about.

Cheers everyoneEdited by CaptainBoing 2017-04-16

bigmik

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Joined: 20/06/2011
Location: Australia
Posts: 2870

Posted: 07:31pm 15 Apr 2017

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@All,

That Thread that JMan linked to was what I was thinking of in my first post! Do you think I could find it??

I have looked up DHCP on the Wiznet modules using Dr. Google and it appears that you need to implement an entire DHCP protocol which isnt as easy as setting a STATIC IP.

If someone comes up with a DHCP command that is compatible with the WIZNET module I think I would have all I need to do my `Responder'

Kind Regards,

Mick

Mick's uMite Stuff can be found >>> HERE (Kindly hosted by Dontronics) <<<

CaptainBoing

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Posts: 1985

Posted: 11:37pm 15 Apr 2017

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bigmik said @All,
I have looked up DHCP on the Wiznet modules using Dr. Google and it appears that you need to implement an entire DHCP protocol which isnt as easy as setting a STATIC IP.
Mick

... and that is proper nasty

http://www.freesoft.org/CIE/RFC/2131/20.htm

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