I do almost the same thing with a Raspberry Pi and I get the same errors
with the same frequency. I'm new to OWFS, but I'm fairly sure that those
are just normal 1-wire "collisions". When the master requests data from
the bus, each sensor waits a random period of time and then sends its
ID+data. Occasionally, two sensors just happen to send at the same time.
My python script just tries again when there is a CRC error.
BTW, I don't use a DS2482 master. I just drive the data bus from GPIO pin4.
OWFS is built into Raspbian and already configured for pin 4.
Just load three modules to enable it:
sudo modprobe wire
sudo modprobe w1_gpio
sudo modprobe w1_therm
On Mon, Apr 8, 2013 at 3:49 PM, <s...@gmx-topmail.de> wrote:
>
> 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
>
>
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