Am 20.04.19 um 23:10 schrieb Mick Sulley:
> Hi Jan,
>
> Thanks for your help - again!
>
> I started to unplug parts of the network, didn't make any difference,
> then I remembered that I had seen this before, dug back in my emails and
> we had a similar email conversation in 2017. By default (I think)
> Raspbian starts w1 and that interferes with owfs.
>
A recent Raspbian install will use the w1 kernel driver for OWFS instead
of controlling the hardware directly.
> In case anyone else
> picks up this thread this is what I did to prevent w1 from running
>
> edit /boot/config.txt and comment out the line
>
> dtoverlay=w1-gpio
>
This can't be an OWFS problem because driving gpios directly isn't
supported by OWFS.
>
> I was seeing that message about every minute. It is now an hour since I
> made the change and there hasn't been a single one!
>
In that case, you have connected something else to GPIO4, and the
enabled w1-gpio conflicts with that hardware/software but not OWFS.
> A couple of other questions,
>
> * Could this issue have caused the Pi itself to crash?
>
No.
> * I know that due to the nature of 1-wire read failures will happen
> occasionally, but what is the expected failure rate roughly?
>
That depends on the cabling. One in a minute for a fully loaded bus is
what I encounter in my installations.
Kind regards
Jan
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