[En-Nut-Discussion] Two Nut/OS boxes do not communicate with eachother

Vesa Jääskeläinen chaac at nic.fi
Tue Dec 12 08:50:39 CET 2006

Hi Willem,

This is most likely your mobile operator 's limitation.

Check from them first and if they claim that they support public
non-firewalled IP's on their network then you might have a chance to

Setup central server or hub somewhere and connect all your modules to there.

Vesa Jääskeläinen

Willem Myburgh wrote:
> Hi Ernst
> We use PPP. Each system connects to a GPRS network.
> Regards
> Willem
> On 12/11/06, Ernst Stippl <ernst at stippl.org> wrote:
>> Hi Willem!
>> How did you connect the two Ethernuts together? Thru one crossover cable
>> or
>> thru a hub/switch/router? Did you use the same connection (cable or box)
>> when trying the PC?
>> regards
>> ernst
>> -----Ursprüngliche Nachricht-----
>> Von: en-nut-discussion-bounces at egnite.de
>> [mailto:en-nut-discussion-bounces at egnite.de] Im Auftrag von Willem Myburgh
>> Gesendet: Montag, 11. Dezember 2006 17:00
>> An: en-nut-discussion at egnite.de
>> Betreff: [En-Nut-Discussion] Two Nut/OS boxes do not communicate with
>> eachother
>> Hi everyone
>> I set up two Nut/OS 4.1.99 embedded systems based on ATMEGA128 AVR. System
>> A
>> is listening on a TCP port, while system B is trying to connect to the
>> listen port on system A. On system A the call to NutTcpAccept returns 0,
>> and
>> on system B the call to NutTcpConnect also returns 0. However a call of
>> both
>> systems to "_read" (IO interface) results in an error, with NutTcpError
>> usually returning 57 (not connected error).
>> When any of the above-mentioned systems is replaced with a Windows XP
>> machine, the connection is established and two-way communication can take
>> place.
>> Does anyone experience the same problem? Do you have a solution?
>> Kind regards
>> --
>> Willem Myburgh
>> South Africa
>> Mobile: +27834150416
>> _______________________________________________
>> http://lists.egnite.de/mailman/listinfo/en-nut-discussion

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