Hi,
just want to give +1 for pyownet. I'm using it for my network and it
works 100% flawless, scanning the alarm dir ~10 times per second and the
full bus every 30 second, reading ~25 temperature sensors every 30 seconds.
This have been running for about a year now, using my own master
software which was designed for a mixed network with slow but powered
temperature sensors and "quick" PIO-devices (such as DS2406), where it
is important to service any PIO input changes quickly (alarm + latch):
https://github.com/stromnet/pyowmaster
I have not yet tested the socket persistence though, that is on my
todo-list!
Johan
On 20/05/15 09:16, Stefano Miccoli wrote:
> Let me answer to the python part of your question.
>
> To access 1-wire sensors from a python script you have two options:
>
> A) install the owserver daemon and access 1-wire data via the owserver
> protocol (aka ownet), see http://owfs.org/index.php?page=owserver-protocol
> B) directly access the “physical bus” from your script.
>
> Let discuss the two approaches.
>
>
> *A) access via owserver.*
>
> The owserver protocol is a TCP network protocol. In python you can use
> either a pure python implementation, or link to an external C library
> that implements the protocol.
>
> As what regards pure python there are two options:
>
> * ownet from the official distribution
> * pyownet, available on
> pypi https://pypi.python.org/pypi/pyownet (pip install pyownet)
> with docs here: http://pyownet.readthedocs.org/en/latest/#
>
>
> (I wrote pyownet to improve the official implementation, which is not
> more maintained on pipy where it stuck at version 0.2 of 2006-12-15)
>
> Alternatively you can go for a binary library binding, which will
> introduce a run time dependency to libow
>
> * ow from the official distribution
> * pyowfs, available on pypi https://pypi.python.org/pypi/pyowfs (pip
> install pyowfs) with docs here: http://priesch.co.at/pyowfs
>
>
>
> In the case of the owserver protocol I would suggest using one of the
> two pure python implementations: bottleneck is usually the 1-wire bus,
> so there is no need to go to a C implementation of the TCP protocol.
> Performance is fairly good with both ownet and pyownet, with a slight
> edge on pyownet, with implements socket persistence and is actively
> maintained. (OK, this is the developer view.)
>
>
> *B) direct access to the bus.*
>
> This is not possible with pure python so you have to go with one of
> the two C API bindings (the official ow or pyowfs). I have no
> experience with this approach (I always install owserver first) so I
> can’t give informed advice. However I would first try pyowfs since it
> is maintained on pypi.
>
>
>
> Bye
>
> Stefano
>
>> On 20 May 2015, at 00:49, DavidJ61 <davejohn...@gmail.com
>> <mailto:davejohn...@gmail.com>> wrote:
>>
>> Further to my above message, I am having a bit of a problem accessing the
>> pressure attribute for the EDS environment sensor EDS0066. I have
>> trawled
>> google and am not able to find any documentation on how I can do this. In
>> fact, as a whole, I have found this to be the case with owpython and it
>> seems I am missing my crystal ball.
>> I'd appreciate a bit of help and guidance.
>>
>>
>>
>> --
>> View this message in context:
>> http://owfs-developers.1086194.n5.nabble.com/owpython-tp5410p11354.html
>> Sent from the OWFS Developers mailing list archive at Nabble.com
>> <http://Nabble.com>.
>>
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>
>
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