On 03/28/2013 11:17 PM, Guy COLIN wrote:
> Hi,
> 
> I would suggest to go step by step to discriminate the faulty equipment:
> Disconnect everything just keep the 6 channel hub connected to the serial 
> link,
> have it running for some time you should see only the master on the owfs tree
> and if you still have the short circuit it's the faulty.
> But most probably it won't.

Yes, I pretty much did what you described.  All of my one-wire stuff goes
through a set of punch down blocks to get to Cat5 wiring to the rooms.
I found 1 flaky run which needed a repunch.

By measuring voltages, I found one device that was just acting bizarre,
so, I swapped it out.  I couldn't get a solid voltage reading.  After
swapping out with a new DS18S20, I got a solid 5V reading.

I don't have a scope.  I'm just using a DVM across DQ/GND.  I assume this
is the proper measuring technique.

On all of the temperature devices which hang off of the main/aux ports,
I measure a good solid 5V.

On the devices which run off the passthrough port of the HUB, I am 
only measuring 4.4V.  Should I expect 5V here?

The network is running much better now.  But, I do need more runtime.

This was actually a good experience.  I've found ways to make my
software much more resilient to errors conditions. I'm also taking
this opportunity to redesign some of the things I did before.

Regards,

Jim



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