Hello Joe,
please always send your mails to owfs-developers mailing list so that it gets
distributed to its members also ...
Regarding your question:
the "28." part of the "id" is the sensor type (e.g. DS1820) and therefore not
part of the 1wire id ...
.find() works very simple, it just tries to find a matching entry in the owfs
tree hierarchy. if you take a look at the entries for a sensor in the
webinterface (owhttpd) you find a parameter "id" and a corresponding value ...
thats exactly what the .find() method tries to find ...
so in theory you can also use it for finding a sensor which has a "temperature"
entry with a given temperature ;)
sorry for the typos, i am currently writing from my mobile phone ;)
regards,
marcus.
joep <[email protected]> schrieb:
>Marcus,
> I should be thanking you for making pyowfs available and
>also answering my query.
>
> Your code works for me. To tell you the full story I had
>already tried something very similar. In your example you used:
> s = c.find (id="4AEC29CDBAAB") [0]
> s.get ("temperature")
> --> 14.1603
>
> In my initial code I used:
> s2 = root.find (id="28.450EDC020000") [0]
> s2.get ("temperature")
> and got:
> " File "./temperature_pyowfs_1.py", line 23, in <module>
> s2 = root.find (id="28.450EDC020000") [0]
> IndexError: list index out of range" (This is the exact
>error using my original code)
>
> After reading your example I used:
> s2 = root.find (id="450EDC020000") [0]
> s2.get ("temperature")
> and got:
> 22.6875
> which is correct.
>
> The difference was that in my initial code I included the
>"28." in the sensor ID key. My question now is: Why isn't the part
>preceding the decimal point in the sensor ID included in the find() key
>?
>
> BTW I got your reply to my question just after I had posted the
>question to the forum (which I found using google). I'll see what comes
>
>back through the forum and then summarize your suggestions and any
>other
>suggestions to the forum so that everyone is informed.
>
> BTW (again) I'm putting together an environmental
>monitoring\management system for my greenhouse and terrarium using
>1-wire technology. The controller is a RaspberryPi. The application
>will
>be developed in Python which I need to learn better than my current
>understanding of it. Nothing like success to prod you towards your
>goals
>and today I did have a success as I got the temperature monitoring
>working as I required it. Good night (I'm writing from Australia and
>it's now 23:20).
>
>--
>Regards
>Joe P.
>
>On 18/04/13 22:18, Marcus Priesch wrote:
>> Hello Joe,
>>
>> thanks for your interest in pyowfs ;)
>>
>> the .get() and .put() methods can only access attributes of a sensor
>> object (the leaves in the tree). To access a specific Sensor by id
>you
>> have to use the .find() method of the connection. Obviously you
>should
>> also check if the sensor actually could be found ...
>>
>> in my example i started a owserver with fake sensors in another
>> terminal:
>>
>> $ owserver --debug -p 4711 --fake=DS2409,DS18S20,DS1921
>>
>> to access a specific sensor i use the following:
>>
>>>>> from pyowfs import Connection
>>>>> c = Connection("localhost:4711")
>>>>> for s in c.find () :
>> ... print s
>> ...
>> <Sensor /1F.67C6697351FF/ - DS2409>
>> <Sensor /10.4AEC29CDBAAB/ - DS18S20>
>> <Sensor /21.F2FBE3467CC2/ - DS1921>
>>>>> for s in c.find (id="67C6697351FF") :
>> ... print s
>> ...
>> <Sensor /1F.67C6697351FF/ - DS2409>
>>>>> s
>> <Sensor /1F.67C6697351FF/ - DS2409>
>>>>> s = c.find (id="67C6697351FF") [0]
>>>>> s
>> <Sensor /1F.67C6697351FF/ - DS2409>
>>>>> s = c.find (id="4AEC29CDBAAB") [0]
>>>>> s.get ("temperature")
>> ' 14.1603'
>>>>> s.get ("temperature")
>> ' 60.6969'
>> The best place to post such questions is the owfs-developers list - i
>> posted this mail also there. see
>>
>> https://lists.sourceforge.net/lists/listinfo/owfs-developers
>>
>> for details on how to access the achives and/or to subscribe
>>
>> all the best,
>> marcus.
>>
>> On Don, 2013-04-18 at 04:55 +0200, [email protected] wrote:
>>> Joseph F. Portell (Joe) sent a message using the contact form at
>>> http://priesch.co.at/contact.
>>>
>>> Marcus how can I directly assign a sensor with a specific ID (eg
>>> 28.450EDC020000) to a variable (type sensor) without having to
>iterate
>>> through all the sensors of a given type and parsing each item in the
>list for
>>> the sensor's ID? I tried to do things like s =
>root.get("/28.450EDC020000")
>>> but failed.
>>>
>>> Also what is the best forum to post these questions to?
>>>
>>> Thanks Joe P.
>>>
>>
>>
--
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