OK that's clear. Thanks Jan
On 24/03/2020 13:08, Jan Kandziora wrote:
Am 24.03.20 um 11:03 schrieb Mick Sulley:
There have been times when using the owhttpd interface page to look at
the various temperatures I have seen 85 at some resolutions and
apparently valid values at other resolutions.
Am 24.03.20 um 11:03 schrieb Mick Sulley:
> There have been times when using the owhttpd interface page to look at
> the various temperatures I have seen 85 at some resolutions and
> apparently valid values at other resolutions.
>
85°C isn't an error value but the power-on value.
If you get bogus
There have been times when using the owhttpd interface page to look at
the various temperatures I have seen 85 at some resolutions and
apparently valid values at other resolutions. Does it therefore make
sense when reading values within my program to check for a valid read at
12 bit (my normal
Am 13.03.20 um 17:05 schrieb zeitvertreib.wiss...@web.de:
> Hello Jan,
> I'm sorry, you are right.
> I do not use bash commands, I do read and write operations from a Python3
> program. I do it step by step, as I'm not used to Python.
> I had a version with uncached, but there was another program
simple read an write operations in
> to files provided at /mnt/1wire and subdirectories.
>
> Regards Heimo
>
> *Gesendet:* Freitag, 13. März 2020 um 18:26 Uhr
> *Von:* "Martin Patzak"
> *An:* "OWFS (One-wire file system) discussion and help"
> , zeitv
OWFS on Raspian Buster on
> PIs. File system an sensors appear in duplicates. I give you a link to
> the forum of the manufacturer of the used DS2482-100 adapter:
>
> https://www.abelectronics.co.uk/forums/thread/303/owfs-duplicates
>
> Regards
> H. Wissing
>
>
>
&g
iomedizinische Technik
Neckarweg 1, 69118 Heidelberg
Tel.: 06221/801679 FAX: 06221/803738
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Gesendet: Freitag, 13. März 2020 um 15:48 Uhr
Von: "Jan Kandziora"
An: owfs-developers@lists.sourceforge.net
Betreff: Re: [Owfs-developers] How to Use Simultaneo
Am 13.03.20 um 15:12 schrieb hwissing:
> Hello,
>
> I think one issue from the primary question is not answered..
>
> /" If I read from '/temperature' then I get them read in much faster
> *but I don't get a fresh conversion each time."*/
>
This is a very old question, and the mechanism has
Hello,
I think one issue from the primary question is not answered..
/" If I read from '/temperature' then I get them read in much faster *but I
don't get a fresh conversion each time."*/
I have the same issue. First conversion with 8 DS18B20 sensors takes about 1
sec, immediately following
I spent a little time reading the thread you referenced and going back to
the datasheets. You said,
David Lissiuk pointed out that my assumptions about the DS18x20's behavior
were incorrect. This may explain the rare problems with conversion,
especially when powered and unpowered sensors were
Ah, writing to '/simultaneous' actually seems to wait for the conversion to
complete. I didn't realize that. I'd better check the code here ...
... Yes, it does poll for completion of the conversion. I think that
explains a few things. I'll go back to the drawing board with this new info.
Is
Documented? Apparently not well. This note should help:
http://www.mail-archive.com/owfs-developers@lists.sourceforge.net/msg02524.html
On Sun, Jul 13, 2008 at 3:25 AM, Doug Collinge [EMAIL PROTECTED]
wrote:
Ah, writing to '/simultaneous' actually seems to wait for the conversion to
I'm writing myself a little Python code here and trying to use
'simultaneous' but getting results that are inconsistent with my
understanding.
I have multiple DS1820 devices on a bus. They are all powered devices. I
want to simultaneously convert them all, wait, then read them all. I'm
Your second use i the correct one.
Write 1 to simultaneous to trigger a conversion. That also clears the
cache. A normal read will read immeadiately the already measured temperature
ready in the device.
Paul Alfille
On Sat, Jul 12, 2008 at 8:28 PM, Doug Collinge [EMAIL PROTECTED]
wrote:
I'm
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