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Groups > comp.arch.embedded > #27330

Re: Embedded Ethernet

From Les Cargill <lcargill99@comcast.com>
Newsgroups comp.arch.embedded
Subject Re: Embedded Ethernet
Date 2017-09-28 20:06 -0500
Organization A noiseless patient Spider
Message-ID <oqk614$3eo$1@dont-email.me> (permalink)
References <oq3bj1$btg$1@dont-email.me> <WNWdnXHLauJvy1jEnZ2dnUU7-UednZ2d@earthlink.com> <oq417s$h39$1@dont-email.me> <oq5bf9$94c$1@dont-email.me>

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David Brown wrote:
> On 23/09/17 00:01, pozz wrote:
>> Il 22/09/2017 20:31, Joe Chisolm ha scritto:
>>> On Fri, 22 Sep 2017 17:52:01 +0200, pozz wrote:
>>>
>>>> There are many MCUs with embedded Ethernet (MAC). It seems most
>>>> of
>> the
>>>> open-source examples are lwip-based.
>>>>
>>>> I have to design a board with one RS485 port and one Ethernet
>> port. It
>>>> could be seen as a serial-to-Ethernet converter, where the
>> protocol on
>>>> RS485 is proprietary. On Ethernet side I will contact a server
>> (cloud)
>>>> with a protocol that must be defined.
>>>>
>>>> At the moment, I don't need to implement a server, only a
>>>> simple
>> client.
>>>>
>>>> Do you suggest some hw/fw platforms that you think are better
>>>> than
>> others?
>>>
>>> How are you connecting to this "cloud" server?  Simple TCP or
>>> UDP
>> or is it
>>> some type of web services?
>> I can choose. I know UDP is much smaller than TCP, but I should
>> add some TCP-features on top of UDP: mainly ack and
>> retransmissions. So I can argue TCP is overall better than UDP.
>
> You certainly /can/ argue that!  TCP/IP has many advantages over
> UDP. The key ones are that it saves you worrying about reinventing
> the wheel here.  With UDP, you never know if your data got
> transferred - so you need application layers to handle that.

I just last week had to put a dead man timer in a client to
detect whether the server had gone offline using TCP.

You'll end up rippling the protocol up to the app
layer no matter what :) You'll get a more performant
system with UDP.

<snip>
-- 
Les Cargill

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Embedded Ethernet pozz <pozzugno@gmail.com> - 2017-09-22 17:52 +0200
  Re: Embedded Ethernet mmm <m.colandrea@libero.it> - 2017-09-22 18:00 +0200
  Re: Embedded Ethernet David Brown <david.brown@hesbynett.no> - 2017-09-22 20:27 +0200
    Re: Embedded Ethernet pozz <pozzugno@gmail.com> - 2017-11-17 10:25 +0100
      Re: Embedded Ethernet Theo Markettos <theom+news@chiark.greenend.org.uk> - 2017-11-17 10:39 +0000
        Re: Embedded Ethernet pozz <pozzugno@gmail.com> - 2017-11-17 12:25 +0100
      Re: Embedded Ethernet "Boudewijn Dijkstra" <sp4mtr4p.boudewijn@indes.com> - 2017-11-17 11:36 +0100
        Re: Embedded Ethernet pozz <pozzugno@gmail.com> - 2017-11-17 12:54 +0100
      Re: Embedded Ethernet David Brown <david.brown@hesbynett.no> - 2017-11-17 15:23 +0100
      Re: Embedded Ethernet Mikko OH2HVJ <mikko.syrjalahti@nospam.fi> - 2017-11-18 11:29 +0200
  Re: Embedded Ethernet Joe Chisolm <jchisolm6@earthlink.net> - 2017-09-22 13:31 -0500
    Re: Embedded Ethernet pozz <pozzugno@gmail.com> - 2017-09-23 00:01 +0200
      Re: Embedded Ethernet raimond.dragomir@gmail.com - 2017-09-22 22:38 -0700
        Re: Embedded Ethernet raimond.dragomir@gmail.com - 2017-09-22 22:41 -0700
      Re: Embedded Ethernet David Brown <david.brown@hesbynett.no> - 2017-09-23 12:02 +0200
        Re: Embedded Ethernet Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-09-23 06:32 -0400
          Re: Embedded Ethernet Dimiter_Popoff <dp@tgi-sci.com> - 2017-09-23 15:31 +0300
            Re: Embedded Ethernet Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-09-25 13:07 -0400
              Re: Embedded Ethernet Robert Wessel <robertwessel2@yahoo.com> - 2017-09-25 15:31 -0500
                Re: Embedded Ethernet Dimiter_Popoff <dp@tgi-sci.com> - 2017-09-27 01:50 +0300
          Re: Embedded Ethernet Les Cargill <lcargill99@comcast.com> - 2017-09-28 20:07 -0500
        Re: Embedded Ethernet upsidedown@downunder.com - 2017-09-23 14:48 +0300
        Re: Embedded Ethernet Les Cargill <lcargill99@comcast.com> - 2017-09-28 20:06 -0500
          Re: Embedded Ethernet Joe Chisolm <jchisolm6@earthlink.net> - 2017-09-29 09:41 -0500
          Re: Embedded Ethernet upsidedown@downunder.com - 2017-09-30 18:49 +0300
        Re: Embedded Ethernet pozz <pozzugno@gmail.com> - 2017-10-12 11:26 +0200
          Re: Embedded Ethernet David Brown <david.brown@hesbynett.no> - 2017-10-12 12:46 +0200
          Re: Embedded Ethernet Joe Chisolm <jchisolm6@earthlink.net> - 2017-10-12 10:49 -0500
      Re: Embedded Ethernet Grant Edwards <invalid@invalid.invalid> - 2017-09-23 20:40 +0000
        Re: Embedded Ethernet Joe Chisolm <jchisolm6@earthlink.net> - 2017-09-23 19:24 -0500
          Re: Embedded Ethernet David Brown <david.brown@hesbynett.no> - 2017-09-24 13:28 +0200
  Re: Embedded Ethernet Les Cargill <lcargill99@comcast.com> - 2017-09-22 21:12 -0500
  Re: Embedded Ethernet Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2017-09-24 11:01 +0300
  Re: Embedded Ethernet pozz <pozzugno@gmail.com> - 2017-10-16 14:10 +0200
    Re: Embedded Ethernet David Brown <david.brown@hesbynett.no> - 2017-10-16 15:10 +0200
      Re: Embedded Ethernet pozz <pozzugno@gmail.com> - 2017-10-16 17:54 +0200
        Re: Embedded Ethernet David Brown <david.brown@hesbynett.no> - 2017-10-16 23:45 +0200
          lwip/httpd: how to return dynamic data [was Re: Embedded Ethernet] pozz <pozzugno@gmail.com> - 2017-11-13 12:11 +0100
            Re: lwip/httpd: how to return dynamic data [was Re: Embedded Ethernet] David Brown <david.brown@hesbynett.no> - 2017-11-13 14:14 +0100

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