W dniu 08.04.2013 o 22:49 <s...@gmx-topmail.de> pisze:

 
Hi,
I use owfs on a raspberry pi with ds2482 and ten ds18s20 on about 10 m cable.
i read the temperatures from the mounted file system with a python script every minute.
so about 60x60x10 measurement values a day. From time to time I get read errors on the sensors .
they give a temperature of 85 deg. This happens about 10 to 15 times a day. So not often, and normally the bus works great. But how can I fix this? What's the problem? Conversion time?
thanks for any help

Do you use some voltage converter or everything works on 3.3V?
If so you can use a simple converter and run the 1wire side on 5v. 

Another thing is power, do you use parasite power or a separate wire to power the sensors?



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patryk
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