2012-04-03 20:45 keltezéssel, Markus Gaugusch írta: > I assume that the serial port of the embedded system only provides 5V > on its signal lines. If the DS9097 expects 12V and uses a voltage > regulator to provide 5V to the bus, it will most probably fail. > I use this homemade adapter: http://owfs.sourceforge.net/adapters/db-9.png
> Can you measure voltage between 1wire and gnd pins on your adaptor? I've measured (all values relative to signal ground [Pin #5]). (All of them are 9pin DB9 type connectors!) On the Alix board : Pin voltage 3 -5,6 4 5,9 7 5,9 On the PC serial port : Pin voltage 3 -10,9 4 -10,8 7 -10,9 On the Routerboard : Pin voltage 3 -5,6 4 0 7 0 > It should not be much less than 5 volts. I can measure on the 1w bus (the output of the 9097 adapter) 5,9V Can you suggest anything to make it work? (Or does anybody know a dealer in hungary I can order a non-passive serial bus-master?) Thanks kako ------------------------------------------------------------------------------ Better than sec? Nothing is better than sec when it comes to monitoring Big Data applications. Try Boundary one-second resolution app monitoring today. Free. http://p.sf.net/sfu/Boundary-dev2dev _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
