Hi,
I now have pyowfs working, thanks to the help from Marcus, but I now
realise that I really have no idea how to use it. I have created a
script based on the examples on http://priesch.co.at/pyowfs
my script is -
#! /usr/bin/env python
# my sensor is DS18S20, id = 100D54A9010800DC
from pyowfs import Connection
root = Connection ("/dev/ttyD1")
for s in root.find () : print s
print '-- disabling the cache is reflected in the %r of the sensor --'
s.use_cache (0)
for s in root.find () : print s
print '---- find sensors of a specific type ----'
s = root.find (type="DS2502")[0]
print '--- dump all entries for a sensor ---'
for e in s.iter_entries () : print e
print '--- access memory ---'
s.get ("memory")
print '-- pages is a directory, so lets see whats beneath it :'
s.get ("pages")
for e in s.get ("pages").iter_entries () : print e
print ' --access to individual pages :'
s.get ("pages").get ("page.1")
s.get ("pages").get ("page.2")
when I run it I get -
m...@mick-desktop:~/Documents/Controls$ ./pyowfs_test.py
<Sensor /10.0D54A9010800/ - DS18S20>
<Sensor /09.2179B9050000/ - DS2502>
-- disabling the cache is reflected in the %r of the sensor --
<Sensor /10.0D54A9010800/ - DS18S20>
<Sensor /09.2179B9050000/ - DS2502>
---- find sensors of a specific type ----
--- dump all entries for a sensor ---
address
alias
crc8
family
id
locator
memory
<Dir '/09.2179B9050000/pages/'>
present
r_address
r_id
r_locator
type
--- access memory ---
-- pages is a directory, so lets see whats beneath it :
page.ALL
page.0
page.1
page.2
page.3
--access to individual pages :
m...@mick-desktop:~/Documents/Controls$
I am really not sure how to read the temperature from my sensor, it
doesn't seem to be included in the data returned by the script. Is
there a manual saying what the commands do, what commands are available
etc?
What I am trying to achieve is to read about 20 DS18S20 sensors so I can
log the values and use it for controlling pumps and valves. The system
needs to be reliable so I also want to log any read failures and how
long each read takes.
Thanks
Mick
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