Heizung Temperature Measurement, Support Programs
The temperature measurement, diagram generation and web-cam snapshots are done in about 30 second intervals. See description in HeizungTempMess (German) for the self written programs (in Python and shell script).
Here the Linux support programs from the SlugOS 4.8 repository will be described.
In SlugOS 5.3 a memory leakage problem prevented me from using this application.
The normal ipkg packages: rudi@LKG300DB0:~$ sudo ipkg update Downloading http://ipkg.nslu2-linux.org/feeds/slugosbe/cross/4.8-beta/Packages.gz Downloading http://ipkg.nslu2-linux.org/feeds/slugosbe/native/4.8-beta/Packages.gz Updated list of available packages in /var/lib/ipkg/native The optware packages: rudi@LKG300DB0:~$ sudo ipkg-opt update Downloading http://ipkg.nslu2-linux.org/feeds/optware/slugosbe/cross/unstable/Packages.gz Updated list of available packages in /opt/lib/ipkg/lists/optware
Temperature Data Collection, digitemp
The program digitemp was written from Brain C. Lane http://www.digitemp.com . It installs the following programs:
$ sudo ipkg-opt install digitemp
rudi@LKG300DB0:~$ ls -ls /opt/bin/digi*
0 lrwxrwxrwx 1 root root 24 Mar 3 11:22 /opt/bin/digitemp -> /opt/bin/digitemp_DS9097
52 -rwxr-xr-x 1 root root 51636 Sep 10 2008 /opt/bin/digitemp_DS2490
51 -rwxr-xr-x 1 root root 50860 Sep 10 2008 /opt/bin/digitemp_DS9097
55 -rwxr-xr-x 1 root root 55044 Sep 10 2008 /opt/bin/digitemp_DS9097U
Explanation: DS9097 is the RS232 to 1-wire adapter. It can be build homemade.
With the softlink "digitemp" the suitable adapter is set.
$ cd /opt/bin
$ ln -s digitemp_DS9097 digitempThe first action is to initialize the 1-wire bus, in order to check for the connected sensors and to created a resource file.
$ digitemp -i -s /dev/ttyUSB0 -a -o2 rudi@LKG300DB0:~/heizung$ ls -ls .digitemprc 1 -rw-r--r-- 1 root www-data 441 Feb 13 16:08 .digitemprc rudi@LKG300DB0:~/heizung$ cat .digitemprc TTY /dev/ttyUSB0 READ_TIME 1000 LOG_TYPE 2 LOG_FORMAT "%b %d %H:%M:%S Sensor %s C: %.2C" CNT_FORMAT "%b %d %H:%M:%S Sensor %s #%n %C" HUM_FORMAT "%b %d %H:%M:%S Sensor %s C: %.2C F: %.2F H: %h%%" SENSORS 5 ROM 0 0x10 0x50 0x0B 0x6D 0x01 0x08 0x00 0x75 ROM 1 0x10 0xCC 0x10 0x6D 0x01 0x08 0x00 0xB5 ROM 2 0x10 0xA1 0xF9 0x6C 0x01 0x08 0x00 0x9A ROM 3 0x10 0xC7 0x19 0x6D 0x01 0x08 0x00 0xBE ROM 4 0x10 0x37 0x2A 0x6D 0x01 0x08 0x00 0x06
The program digitemp is called from the Python program heizung20.py.
Diagram software Gnuplot
With the program gnuplot it is easy to generate nice diagrams for the 5 different temperature data. The only problem was the font selection for the diagram selection. The original 7x5 pixel font does not look very nice.
Fortunately the GD library allows to use a Freetype font, e.g. bitstream Vera.
optware version
root@LKG300DB0:~$ ipkg-opt install gnuplot
Installing gnuplot (4.2.6-1) to /opt/...
Downloading http://ipkg.nslu2-linux.org/feeds/optware/slugosbe/cross/unstable/gnuplot_4.2.6-1_armeb.ipk
rudi@LKG300DB0:~$ ls -ls /opt/bin/gnuplot
1152 -rwxr-xr-x 1 root root 1172764 Mar 8 04:09 /opt/bin/gnuplot
rudi@LKG300DB0:/opt/lib/ipkg/info$ cat gnuplot.list
/opt/share/gnuplot/4.2/PostScript/cp437.ps
/opt/lib/X11/app-defaults/Gnuplot
/opt/share/info/dir
/opt/share/gnuplot/4.2/PostScript/8859-2.ps
/opt/share/gnuplot/4.2/PostScript/prologue.ps
/opt/share/gnuplot/4.2/PostScript/koi8u.ps
/opt/share/gnuplot/4.2/PostScript/cp852.ps
/opt/share/man/man1/gnuplot.1
/opt/bin/gnuplot
/opt/share/gnuplot/4.2/PostScript/cp850.ps
/opt/share/gnuplot/4.2/PostScript/koi8r.ps
/opt/share/gnuplot/4.2/PostScript/8859-15.ps
/opt/share/gnuplot/4.2/PostScript/cp1250.ps
/opt/share/gnuplot/4.2/PostScript/8859-1.ps
/opt/share/texmf/tex/latex/gnuplot/gnuplot.cfg
/opt/share/gnuplot/4.2/gnuplot.gih
/opt/share/info/gnuplot.info
/opt/share/info/dir.old
root@LKG300DB0:~$ ldd /opt/bin/gnuplot
libreadline.so.6 => /opt/lib/libreadline.so.6 (0x40022000)
libncurses.so.5 => /opt/lib/libncurses.so.5 (0x4005d000)
libz.so.1 => /opt/lib/libz.so.1 (0x400a5000)
libgd.so.2 => /opt/lib/libgd.so.2 (0x400bf000)
libjpeg.so.62 => /opt/lib/libjpeg.so.62 (0x40107000)
libfontconfig.so.1 => /opt/lib/libfontconfig.so.1 (0x40130000)
libfreetype.so.6 => /opt/lib/libfreetype.so.6 (0x40159000)
libpng12.so.0 => /opt/lib/libpng12.so.0 (0x401cb000)
libm.so.6 => /lib/libm.so.6 (0x401f4000)
libstdc++.so.6 => /opt/lib/libstdc++.so.6 (0x4029b000)
libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x40379000)
libc.so.6 => /lib/libc.so.6 (0x4038b000)
libexpat.so.1 => /opt/lib/libexpat.so.1 (0x40492000)
/lib/ld-linux.so.2 (0x40000000)
ipkg version
Second installing gnuplot from ipkg repository, for compare with optware. Unfortunately no package libgd was included. Hence, it is necessary to use the optware version. In order to do so, /usr/bin/gruplot must be renamed, because it comes first in the PATH list.
$ sudo ipkg install gnuplot
rudi@LKG300DB0:~/heizung$ ls -ls /usr/bin/gnuplot
1061 -rwxr-xr-x 1 root root 1079532 Mar 2 2008 /usr/bin/gnuplot
rudi@LKG300DB0:~/heizung$ sudo ipkg files gnuplot
Package gnuplot (4.2.0-r1) is installed on root and has the following files:
/usr/share/gnuplot/4.2/PostScript/koi8r.ps
/usr/share/gnuplot/4.2/PostScript/8859-2.ps
/usr/share/gnuplot/4.2/PostScript/cp437.ps
/usr/share/gnuplot/4.2/PostScript/8859-15.ps
/usr/share/gnuplot/4.2/PostScript/cp852.ps
/usr/share/gnuplot/4.2/PostScript/prologue.ps
/usr/share/gnuplot/4.2/PostScript/koi8u.ps
/usr/share/gnuplot/4.2/PostScript/cp850.ps
/usr/bin/gnuplot
/usr/share/gnuplot/4.2/PostScript/cp1250.ps
/usr/share/gnuplot/4.2/PostScript/8859-1.ps
rudi@LKG300DB0:~/heizung$ ldd /usr/bin/gnuplot
libreadline.so.4 => /usr/lib/libreadline.so.4 (0x40022000)
libncurses.so.5 => /usr/lib/libncurses.so.5 (0x40054000)
libz.so.1 => /usr/lib/libz.so.1 (0x40098000)
libgd.so.2 => /usr/lib/libgd.so.2 (0x400b1000)
libjpeg.so.62 => /usr/lib/libjpeg.so.62 (0x40109000)
libpng12.so.0 => /usr/lib/libpng12.so.0 (0x4012d000)
libm.so.6 => /lib/libm.so.6 (0x40154000)
libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x401fb000)
libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x402d9000)
libc.so.6 => /lib/libc.so.6 (0x402eb000)
libfontconfig.so.1 => /usr/lib/libfontconfig.so.1 (0x403f2000)
libfreetype.so.6 => /usr/lib/libfreetype.so.6 (0x40422000)
/lib/ld-linux.so.2 (0x40000000)
libexpat.so.1 => /usr/lib/libexpat.so.1 (0x4048e000)
rudi@LKG300DB0:~/heizung$ sudo ipkg -test install gdlib
Nothing to be done
An error ocurred, return value: 4.
Collected errors:
Cannot find package gdlib.
Check the spelling or perhaps run 'ipkg update'
WebCam support, USB UVC Video Class Snapshot-Software
In order to use a Logitech E3500 WebCam I needed to have the file uvccapture in order to capture a JPEG picture. It is available from http://packages.debian.org/lenny/uvccapture in an ARM version (0.5-1), but it does not work under SlugOS 4.8, but you can get the source code there.
Fortunately I got in December 2008 via the mail list http://groups.yahoo.com/group/nslu2-linux/ from Jon Barber the already compiled versions of uvccapture and the suitable kernel modules.
For SlugOS 5.3 I compiled the programs by myself and documented that on http://www.nslu2-linux.org/wiki/HowTo/AddUvccaptureToPackages :
rudi@LKG300DB0:/opt/lib/ipkg/info$ ls -ls /opt/bin/uvccapture
26 -rwxr-xr-x 1 root root 25370 Dec 16 2008 /opt/bin/uvccapture
rudi@LKG300DB0:/opt/lib/ipkg/info$ ldd /opt/bin/uvccapture
libjpeg.so.62 => /usr/lib/libjpeg.so.62 (0x40022000)
libc.so.6 => /lib/libc.so.6 (0x40046000)
libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x4014d000)
/lib/ld-linux.so.2 (0x40000000)
Kernel modules, video for Linux (v4l) drivers:
rudi@LKG300DB0:/opt/lib/ipkg/info$ lsmod
Module Size Used by
uvcvideo 51980 0
v4l2_compat_ioctl32 480 1 uvcvideo
videodev 32960 1 uvcvideo
v4l1_compat 12580 2 uvcvideo,videodev
rudi@LKG300DB0:/lib/modules/2.6.21.7/kernel/drivers/drivers/media/video$ ls -ls
1 drwxr-xr-x 2 root root 1024 Mar 5 11:48 uvc
19 -rw-r--r-- 1 root root 18352 Dec 16 2008 v4l1-compat.ko
3 -rw-r--r-- 1 root root 2216 Dec 16 2008 v4l2-compat-ioctl32.ko
48 -rw-r--r-- 1 root root 47232 Dec 16 2008 videodev.ko
rudi@LKG300DB0:/lib/modules/2.6.21.7/kernel/drivers/drivers/media/video/uvc$ ls -ls
70 -rw-r--r-- 1 root root 70488 Dec 16 2008 uvcvideo.ko
moin Wiki for presentation
In order to present the temperature data and the WebCam picture, it was the easiest way to use the moin Wiki software, written in Python. The moin Wiki software also helped to document a few things, and was small enough to run on the NSLU2 box.
It is the best to stay with version 1.8.7 (http://www.moinmo.in/MoinMoinDownload), because the actual version 1.9.2 has more demand to RAM and a lot of things are changed under the hood, so a lot of macros no longer work.
The moin distribution package was copied to /home/user and expanded.
wikiconfig.py adoption
The wikiconfig.py file was copied from the moin/wiki/config folder to the moin folder and adopted:
sitename = u'RudisWiki'
logo_string = u'<img src="/moin_static186/common/nslu2-slugosbe-baby_re.png" alt="rudiwiki.de Logo">'
interwikiname = 'RudisWiki'
show_interwiki = 1
# show page load timings on web page
show_timings = True
superuser = [u'RudolfReuter', ]
acl_rights_before = u"RudolfReuter:read,write,delete,revert,admin All:read"
mail_smarthost = "mail.arcor.de"
mail_from = u"reuterru"
mail_login = "xxxx"
language_default = 'de'
moin wiki start
In order to start and stop the moin wiki with the standalone server the file moin must be copied and started.
rudi $ cp /home/rudi/moin/wiki/server/moin /home/rudi/moin/moin rudi $ chmod a+x /home/rudi/moin/moin rudi $ /home/rudi/moin server standalone --start or rudi $ /home/rudi/moin server standalone --stop
A few macros must be copied to moin/wiki/data/plugin/macro
form.py - The Form macro displays forms based on database records (example only), http://www.moinmo.in/MacroMarket/Form
- GetVarURL2.py - Read out data to insert into a wiki page.
SiteIndex.py - from http://www.moinmo.in/MacroMarket/SiteIndex
Macro GetVarURL2.py
1 # -*- coding: iso-8859-1 -*-
2 """
3 MoinMoin - GetVarUrl2
4
5 This macro is used to exctract data from a .csv file.
6 The file name is URL coded, to be found under wiki/htdocs.
7 The data are taken from the first line.
8 The second parameter n defines which element n to extract (0..n-1),
9 or 'info' for the file info (date, length, type),
10 or 'loadavg' for the load average string.
11
12 @copyright: 2008 MoinMoin:RudolfReuter
13 @license: GNU GPL, see COPYING for details.
14 2009-01-20 setup, debug help is provided, ver. 2.2
15 """
16
17 Dependencies = ['time'] # do not cache
18
19 import urllib, re
20 from MoinMoin import config, wikiutil
21 from MoinMoin.parser.text_moin_wiki import Parser
22
23 def execute(macro, params):
24 request = macro.request
25 formatter = macro.formatter
26 #import pdb; pdb.set_trace() # debug
27 #import rpdb2; rpdb2.start_embedded_debugger('oz') # http://winpdb.org
28 paramslst = params.split(',')
29 url = paramslst[0]
30 n = 0
31 if paramslst[1].isdigit(): # for csv parameters
32 n = int(paramslst[1]);
33 try:
34 text = urllib.urlopen( url ).read()
35 textlst = text.split(';') # element separation character = ";"
36 text = textlst[n]
37 if n > 1: # scale temperatur by 10
38 a = int(text)/10.0
39 text = str(a)
40 except IOError:
41 text = "{{{ IncludeUrl failed on " + url + " }}}"
42
43 elif paramslst[1].find("loadavg") >= 0 :
44 loadavgstr = open('/proc/loadavg', 'r').readline().strip()
45 text = loadavgstr
46
47 elif paramslst[1].find("finfo") >= 0 :
48 # for file date use file://... instead of http://...
49 infoobj = urllib.urlopen( url ).info()
50 infodict = infoobj.items()
51 infotxt = ''
52 for info in infodict:
53 infotxt += info[0] + ': ' + info[1] + '<<BR>>'
54 text = infotxt
55
56 elif paramslst[1].find("meminfo") >= 0 :
57 # some regular expressions for searching and matching
58 EXPR={ 'free_swap':re.compile('^SwapFree.*'), \
59 'total_swap':re.compile('^SwapTotal.*'), \
60 'free_mem':re.compile('MemFree.*'), \
61 'total_mem':re.compile('MemTotal.*'), \
62 'buffer_mem':re.compile('Buffers.*'), \
63 'cache_mem':re.compile('Cached.*'), \
64 'number':re.compile('[0-9]+'), \
65 }
66 fd = file('/proc/meminfo', 'r') # open file
67 for line in fd: # iterate through it
68 if EXPR['free_swap'].match(line):
69 free_swap=int(EXPR['number'].findall(line)[0])
70 elif EXPR['total_swap'].match(line):
71 total_swap=int(EXPR['number'].findall(line)[0])
72 elif EXPR['free_mem'].match(line):
73 free_mem=int(EXPR['number'].findall(line)[0])
74 elif EXPR['total_mem'].match(line):
75 total_mem=int(EXPR['number'].findall(line)[0])
76 elif EXPR['cache_mem'].match(line):
77 cache_mem=int(EXPR['number'].findall(line)[0])
78 elif EXPR['buffer_mem'].match(line):
79 buffer_mem=int(EXPR['number'].findall(line)[0])
80 fd.close() # close file
81 text = '/proc/meminfo [KB]: !SwapFree: ' + str(free_swap)
82 text += ', !SwapTotal: ' + str(total_swap)
83 #text += '<<BR>>'
84 text += ', !MemFree: ' + str(free_mem)
85 text += ', !MemTotal: ' + str(total_mem)
86 text += ', Buffers: ' + str(buffer_mem)
87 text += ', Cached: ' + str(cache_mem)
88
89 else:
90 text = 'Parameter not known, use: finfo, loadavg, meminfo '
91
92 result = unicode(text)
93 #pagename = formatter.page.page_name
94
95 # from "minipage.py" macro (MacroMarket)
96 Parser = wikiutil.searchAndImportPlugin(request.cfg, "parser", request.page.pi['format'])
97 return wikiutil.renderText(request, Parser, result)
moin logging, wikiserverlogging.conf
The moin logging was changed to output to the RAM disk with the rotating file handler:
1 # This is the standalone wikiserver logging configuration.
2 # It can be easily modified to help when debugging, see the comments.
3 # Available loglevels, to adjust verbosity: DEBUG, INFO, WARNING, ERROR, CRITICAL
4 # 2009-05-31 RudolfReuter, changed to rotating file handler
5
6 [DEFAULT]
7 #logfile=moin.log
8 logfile=/var/volatile/www/moin_rot.log
9
10 [loggers]
11 keys=root,moin_debug
12
13 [logger_root]
14 level=INFO
15 #handlers=stderr
16 handlers=logfile
17
18 [logger_moin_debug]
19 # adapt the next lines to your debugging needs:
20 level=INFO
21 handlers=stderr
22 qualname=MoinMoin.auth
23 propagate=0
24
25 [handlers]
26 keys=logfile,stderr
27
28 [handler_logfile]
29 #class=FileHandler
30 class=handlers.RotatingFileHandler
31 formatter=default
32 level=DEBUG
33 #args=('%(logfile)s', 'at')
34 # rotate if the size of 32000 bytes are reached, 2 files total.
35 # args filename, mode, maxBytes, backupCount
36 args=('%(logfile)s', 'a', 32000, 1)
37
38 [handler_stderr]
39 class=StreamHandler
40 formatter=default
41 level=DEBUG
42 args=(sys.stderr, )
43
44 [formatters]
45 keys=default
46
47 [formatter_default]
48 format=%(asctime)s %(levelname)s %(name)s:%(lineno)d %(message)s
49 datefmt=
50 class=logging.Formatter
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-- RudolfReuter 2010-03-06 17:39:02
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