short circuit can be a voltage over 5volts too, some time ago i get about
7volts in digital data wire, and the ds18b20 was reporting short circuit,
maybe your wire have interference like happened with me, or it's really
short circuited (data and ground wires)
2013/3/27 Jim Duda <[email protected]>
> I'm having trouble with my 1-wire network and I'm looking for help in
> diagnosing.
> It's been working fine for many years, but now I'm having some trouble.
>
> Here is my configuration:
>
> I upgraded to the latest code:
> owserver version:
> 2.9p0
> libow version:
> 2.9p0
>
> Devices describes as series connections
>
> 1-wire serial adapter
> 6-channel Hub
> aux -> DS18S20
> main -> DS18S20
> aux -> DS18S20
> main -> DS18S20
> aux -> DS18S20
> main -> DS18S20
> DS2408 (hobby boards 8-channel relay)
> DS2408 (hobby boards 8-channel relay)
>
> Not very taxing.
>
> I'm using the OWNet.pm perl interface module.
> I have a 12-15 parallel tcp connections to owserver accessing the network.
>
> On many reads, but not all, I get an undef return, indicating an error.
>
> So, I turned on debugging:
> /usr/local/bin/owserver -F -d /dev/ttyS5 -p 4304 --nozero --error_level 5
> --error_print 1
>
> When I detect an error, I go look in my syslog. I get many of these
> errors:
> Mar 27 20:24:05 linux OWFS[7240]: CONNECT: ow_reset.c:(36) 1-wire bus
> short circuit.
>
> I get these errors when attempting to access the DS2408 on the backend of
> the HUB passthrough.
> I get these errors when attempting to access some of the DS18S20 devices
> on the aux/main ports.
>
> I've checked all the wire connections and all appear good.
> I haven't gone the route of cutting and redoing all of the RJ45
> connections yet.
>
> Questions:
> Is a 1-wire bus short circuit error is as simple as the description?
> Can a short circuit on a hub port corrupt the main line or does the hub
> isolate all ports?
> Might this be a problem with my serial adapter?
>
> I have ordered a new USB adapter from hobby boards.
> I have also ordered the "sniffer" device. Might be fun to have around :-)
>
> Any advice appreciated.
>
> Regards,
>
> Jim
>
>
>
>
>
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--
Roberto Spadim
SPAEmpresarial
------------------------------------------------------------------------------
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Compete for recognition, cash, and the chance to get your game
on Steam. $5K grand prize plus 10 genre and skill prizes.
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