Am 17.03.2014 21:14, schrieb Jan Sennesael:
>
> The layout is:
>
> master -- 8 port hub ----- 12 port hub 1 -- counter module 1
> | | | \- counter module 2
> | 4 DS18.20 10 DS18.20 \-12 port hub 2 --- 5 DS18.20
> 4 port hub -- 3 DS18.20
>
> I am using utp cat 5e for all connection. distances differ
>
This is a tree topology, with is the extreme worst you can do with
onewire. It is expected to be a *bus*, not a star and not a tree. Don't
expect anything not a bus working reliable. This is due to overlapping
signal reflections from each leaf.
If you really need a tree, you have to put a DS2409 bus coupler on each
fork. Usually it is simpler to create an electrical bus without leaves
by making lobes of 1wire+GND forward and 1wire+GND return wires to the
remote locations.
>
> The problem that i am experiencing is that when i read the value of the
> counters via the command line, owfs crashes sometimes (not always at the
> same time). I can solve it by killing it and restarting
>
Start it with --debug and see what it says when crashing.
Kind regards
Jan
------------------------------------------------------------------------------
Learn Graph Databases - Download FREE O'Reilly Book
"Graph Databases" is the definitive new guide to graph databases and their
applications. Written by three acclaimed leaders in the field,
this first edition is now available. Download your free book today!
http://p.sf.net/sfu/13534_NeoTech
_______________________________________________
Owfs-developers mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/owfs-developers
