W dniu 05.11.2012 o 17:08 Domokos MOLNÁR <[email protected]> pisze:
> Hi, > > I have a tree topology, with branches that works fine: > > USB adapter > > *1m trunk*, then a 8m branch, then 4x1.5m branches ([3x DS18S20 1 per > branch], and [2 ds2405 and 3 ds2406 on a branch]) and a 3m empty branch > :) > > *3m trunk*, then 2x6m (2xDS18B20) and a 15m branch (1x2xDS18B20), the > latter with has another 1.5 m branch (1xDS2405) > > *6m trunk*, then a 1.5m (1xDS18B20) and then a 4m branch (1xDS2405) > > All devices have 1-wire, ground and +5V: I've never seen a single CRC > error. > > There is a Maxim/Dallas white paper about bus topology (I recommend you > Google for it), which describes how you need to calculate the complexity AFIK it's better for the branches to be the same length because of the reflection of the signal from the end of every arm. http://www.maximintegrated.com/app-notes/index.mvp/id/148 -- p4trykx ------------------------------------------------------------------------------ LogMeIn Central: Instant, anywhere, Remote PC access and management. Stay in control, update software, and manage PCs from one command center Diagnose problems and improve visibility into emerging IT issues Automate, monitor and manage. Do more in less time with Central http://p.sf.net/sfu/logmein12331_d2d _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
