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OWFS Duplicates

477 Views - Created 19/02/2020

19/02/2020

Posted by:
hwissing

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Hello,

I was sucessful to install OWFS with I2C support according to your Knowledge base tutorial on a Raspi 3b+ equipped with 1wirePiPlus running Buster. 

I wonder why there are two busses and all sensors in duplicate.

Any idea?

Do the simultaneous commands work? Is there any documentation for them? I merely found issue blogs.

 

Regards

hwissng

 

pi@Raspi3Bp01:~ $ ls /mnt/1wire -l
insgesamt 0
drwxrwxrwx 1 root root 4096 Feb 19 13:20 28.0A35192D1901
drwxrwxrwx 1 root root 4096 Feb 19 13:20 28.0A35192D1901
drwxrwxrwx 1 root root 4096 Feb 19 13:20 28.629B082D1901
drwxrwxrwx 1 root root 4096 Feb 19 13:20 28.629B082D1901
drwxrwxrwx 1 root root 4096 Feb 19 13:20 28.CF52142D1901
drwxrwxrwx 1 root root 4096 Feb 19 13:20 28.CF52142D1901
drwxr-xr-x 1 root root 4096 Feb 19 12:29 alarm
drwxr-xr-x 1 root root 4096 Feb 19 12:29 bus.0
drwxr-xr-x 1 root root 4096 Feb 19 12:29 bus.1
drwxr-xr-x 1 root root 4096 Feb 19 12:29 settings
drwxrwxrwx 1 root root 4096 Feb 19 13:20 simultaneous
drwxr-xr-x 1 root root 4096 Feb 19 12:29 statistics
drwxr-xr-x 1 root root 4096 Feb 19 12:29 structure
drwxr-xr-x 1 root root 4096 Feb 19 12:29 system
drwxr-xr-x 1 root root 4096 Feb 19 12:29 uncached
pi@Raspi3Bp01:~ $ 

 

19/02/2020

Posted by:
andrew

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Location:
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Hello hwissng

Do you have two instances of owfs running?  Try rebooting and see if there are still duplicate devices in the folder.

Also check in the /etc/owfs.conf and make sure there is only one reference to the i2c device.

With regards to simultaneous commands I don't have any experience using them and the documentation on owfs.org is not very helpful.  The only thing I did find was that some devices can support simultaneous temperature conversions, so include the simultaneous directory but nothing on how to actually use it.

AB Electronics UK Tech Support

25/02/2020

Posted by:
hwissing

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Hello,

thank you for the hint. I tried that and different other things, i also removed the installtion and installed it again. But there is still duplicates in the mount folder. Surprisingly not in owfs http.

Any idea?

Regards

H. Wissing

26/02/2020

Posted by:
andrew

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Do you have the DS2482 or the W1 kernel module enabled?  I found this post on the owfs sourceforge page where somebody had the same issue and the kernel module was suggested as a possible problem.

I have not encountered this problem before so you may find better help with owfs by opening an issue on their Github repository.

AB Electronics UK Tech Support

04/03/2020

Posted by:
hwissing

Last edited: 04/03/2020

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Hello,

to evaluate that, I used newly flashed SD-card with Raspbian Buster with desktop Release date:2020-02-13 and installed OWFS step by step not having enabeled the 1-wire interface but the i2c- interface via raspi-config. At the end two folders bus.0 and bus.1 were fond in /mnt/1wire.

pi@raspberrypi:~ $ sudo apt-get install owfs
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  libow-3.2-3 owfs-common owfs-fuse owftpd owhttpd owserver
Suggested packages:
  owfs-doc
The following NEW packages will be installed:
  libow-3.2-3 owfs owfs-common owfs-fuse owftpd owhttpd owserver
0 upgraded, 7 newly installed, 0 to remove and 0 not upgraded.
Need to get 424 kB of archives.
After this operation, 1,391 kB of additional disk space will be used.
Do you want to continue? [Y/n] Y
Get:1 http://mirror1.hs-esslingen.de/pub/Mirrors/archive.raspbian.org/raspbian buster/main armhf owfs-common all 3.2p3+dfsg1-2 [17.6 kB]
Get:2 http://mirror1.hs-esslingen.de/pub/Mirrors/archive.raspbian.org/raspbian buster/main armhf libow-3.2-3 armhf 3.2p3+dfsg1-2 [269 kB]
Get:3 http://mirror1.hs-esslingen.de/pub/Mirrors/archive.raspbian.org/raspbian buster/main armhf owfs-fuse armhf 3.2p3+dfsg1-2 [23.4 kB]
Get:4 http://mirror1.hs-esslingen.de/pub/Mirrors/archive.raspbian.org/raspbian buster/main armhf owserver armhf 3.2p3+dfsg1-2 [30.8 kB]
Get:5 http://mirror1.hs-esslingen.de/pub/Mirrors/archive.raspbian.org/raspbian buster/main armhf owhttpd armhf 3.2p3+dfsg1-2 [30.9 kB]
Get:6 http://mirror1.hs-esslingen.de/pub/Mirrors/archive.raspbian.org/raspbian buster/main armhf owftpd armhf 3.2p3+dfsg1-2 [42.8 kB]
Get:7 http://mirror1.hs-esslingen.de/pub/Mirrors/archive.raspbian.org/raspbian buster/main armhf owfs all 3.2p3+dfsg1-2 [9,248 B]
Fetched 424 kB in 2s (230 kB/s)
Selecting previously unselected package owfs-common.
(Reading database ... 93525 files and directories currently installed.)
Preparing to unpack .../0-owfs-common_3.2p3+dfsg1-2_all.deb ...
Unpacking owfs-common (3.2p3+dfsg1-2) ...
Selecting previously unselected package libow-3.2-3:armhf.
Preparing to unpack .../1-libow-3.2-3_3.2p3+dfsg1-2_armhf.deb ...
Unpacking libow-3.2-3:armhf (3.2p3+dfsg1-2) ...
Selecting previously unselected package owfs-fuse.
Preparing to unpack .../2-owfs-fuse_3.2p3+dfsg1-2_armhf.deb ...
Unpacking owfs-fuse (3.2p3+dfsg1-2) ...
Selecting previously unselected package owserver.
Preparing to unpack .../3-owserver_3.2p3+dfsg1-2_armhf.deb ...
Unpacking owserver (3.2p3+dfsg1-2) ...
Selecting previously unselected package owhttpd.
Preparing to unpack .../4-owhttpd_3.2p3+dfsg1-2_armhf.deb ...
Unpacking owhttpd (3.2p3+dfsg1-2) ...
Selecting previously unselected package owftpd.
Preparing to unpack .../5-owftpd_3.2p3+dfsg1-2_armhf.deb ...
Unpacking owftpd (3.2p3+dfsg1-2) ...
Selecting previously unselected package owfs.
Preparing to unpack .../6-owfs_3.2p3+dfsg1-2_all.deb ...
Unpacking owfs (3.2p3+dfsg1-2) ...
Setting up owfs-common (3.2p3+dfsg1-2) ...

Creating config file /etc/owfs.conf with new version
Setting up libow-3.2-3:armhf (3.2p3+dfsg1-2) ...
Setting up owserver (3.2p3+dfsg1-2) ...
Job for owserver.service failed because the service did not take the steps required by its unit configuration.
See "systemctl status owserver.service" and "journalctl -xe" for details.
invoke-rc.d: initscript owserver, action "start" failed.
● owserver.service - Backend server for 1-wire control
   Loaded: loaded (/lib/systemd/system/owserver.service; disabled; vendor preset: enabled)
   Active: activating (auto-restart) (Result: protocol) since Sat 2020-02-29 18:29:10 CET; 25ms ago
     Docs: man:owserver(1)
  Process: 1078 ExecStart=/usr/bin/owserver -c /etc/owfs.conf (code=exited, status=0/SUCCESS)
 Main PID: 1078 (code=exited, status=0/SUCCESS)
dpkg: error processing package owserver (--configure):
 installed owserver package post-installation script subprocess returned error exit status 1
Setting up owftpd (3.2p3+dfsg1-2) ...
Created symlink /etc/systemd/system/multi-user.target.wants/owftpd.service → /lib/systemd/system/owftpd.service.
dpkg: dependency problems prevent configuration of owfs:
 owfs depends on owserver (>= 3.2p3+dfsg1-2); however:
  Package owserver is not configured yet.

dpkg: error processing package owfs (--configure):
 dependency problems - leaving unconfigured
Setting up owfs-fuse (3.2p3+dfsg1-2) ...
Created symlink /etc/systemd/system/multi-user.target.wants/owfs.service → /lib/systemd/system/owfs.service.
Setting up owhttpd (3.2p3+dfsg1-2) ...
Created symlink /etc/systemd/system/multi-user.target.wants/owhttpd.service → /lib/systemd/system/owhttpd.service.
Processing triggers for systemd (241-7~deb10u3+rpi1) ...
Processing triggers for man-db (2.8.5-2) ...
Processing triggers for libc-bin (2.28-10+rpi1) ...
Errors were encountered while processing:
 owserver
 owfs
E: Sub-process /usr/bin/dpkg returned an error code (1)

the occuring error seems to be due to not having enabeled the 1-wire interface.

pi@raspberrypi:~ $ sudo apt-get install python-ow
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following NEW packages will be installed:
  python-ow
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
2 not fully installed or removed.
Need to get 31.4 kB of archives.
After this operation, 117 kB of additional disk space will be used.
Get:1 http://mirror1.hs-esslingen.de/pub/Mirrors/archive.raspbian.org/raspbian buster/main armhf python-ow armhf 3.2p3+dfsg1-2 [31.4 kB]
Fetched 31.4 kB in 0s (70.6 kB/s)
Selecting previously unselected package python-ow.
(Reading database ... 93585 files and directories currently installed.)
Preparing to unpack .../python-ow_3.2p3+dfsg1-2_armhf.deb ...
Unpacking python-ow (3.2p3+dfsg1-2) ...
Setting up owserver (3.2p3+dfsg1-2) ...
Created symlink /etc/systemd/system/multi-user.target.wants/owserver.service → /lib/systemd/system/owserver.service.
Created symlink /etc/systemd/system/sockets.target.wants/owserver.socket → /lib/systemd/system/owserver.socket.
Setting up owfs (3.2p3+dfsg1-2) ...
Setting up python-ow (3.2p3+dfsg1-2) ...
pi@raspberrypi:~ $ sudo apt-get install ow-shell
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following NEW packages will be installed:
  ow-shell
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 29.8 kB of archives.
After this operation, 177 kB of additional disk space will be used.
Get:1 http://mirror1.hs-esslingen.de/pub/Mirrors/archive.raspbian.org/raspbian buster/main armhf ow-shell armhf 3.2p3+dfsg1-2 [29.8 kB]
Fetched 29.8 kB in 0s (81.5 kB/s) 
Selecting previously unselected package ow-shell.
(Reading database ... 93612 files and directories currently installed.)
Preparing to unpack .../ow-shell_3.2p3+dfsg1-2_armhf.deb ...
Unpacking ow-shell (3.2p3+dfsg1-2) ...
Setting up ow-shell (3.2p3+dfsg1-2) ...
Processing triggers for man-db (2.8.5-2) ...

I repeated the procedure with the SD-card newly flashed after having enabled both the 1-wire interface and i2c- interface via raspi-config and got a working system with two folders bus.0 and bus.1 in /mnt/1wire and all sensors in duplicate.

Hope that helps answering the question "Do you have the DS2482 or the W1 kernel module enabled?"

What to do?

Regards

hwissing

05/03/2020

Posted by:
hwissing

Users Avatar

I think this information is needed

pi@raspberrypi:~ $ lsmod
Module                  Size  Used by
rfcomm                 49152  4
bnep                   20480  2
hci_uart               40960  1
btbcm                  16384  1 hci_uart
serdev                 20480  1 hci_uart
bluetooth             389120  29 hci_uart,bnep,btbcm,rfcomm
ecdh_generic           28672  1 bluetooth
fuse                  110592  3
8021q                  32768  0
garp                   16384  1 8021q
stp                    16384  1 garp
llc                    16384  2 garp,stp
brcmfmac              311296  0
brcmutil               16384  1 brcmfmac
sha256_generic         20480  0
cfg80211              647168  1 brcmfmac
rfkill                 28672  6 bluetooth,cfg80211
raspberrypi_hwmon      16384  0
v3d                    73728  0
gpu_sched              28672  1 v3d
vc4                   176128  0
drm_kms_helper        184320  1 vc4
drm                   442368  5 v3d,vc4,gpu_sched,drm_kms_helper
drm_panel_orientation_quirks    16384  1 drm
snd_bcm2835            24576  1
snd_soc_core          192512  1 vc4
snd_compress           20480  1 snd_soc_core
snd_pcm_dmaengine      16384  1 snd_soc_core
snd_pcm               102400  4 vc4,snd_pcm_dmaengine,snd_bcm2835,snd_soc_core
snd_timer              32768  1 snd_pcm
syscopyarea            16384  1 drm_kms_helper
sysfillrect            16384  1 drm_kms_helper
sysimgblt              16384  1 drm_kms_helper
fb_sys_fops            16384  1 drm_kms_helper
snd                    73728  7 snd_compress,snd_timer,snd_bcm2835,snd_soc_core,snd_pcm
i2c_bcm2835            16384  1
bcm2835_codec          36864  0
bcm2835_v4l2           45056  0
v4l2_mem2mem           24576  1 bcm2835_codec
bcm2835_mmal_vchiq     32768  2 bcm2835_codec,bcm2835_v4l2
v4l2_common            16384  1 bcm2835_v4l2
videobuf2_dma_contig    20480  1 bcm2835_codec
videobuf2_vmalloc      16384  1 bcm2835_v4l2
videobuf2_memops       16384  2 videobuf2_dma_contig,videobuf2_vmalloc
videobuf2_v4l2         24576  3 bcm2835_codec,bcm2835_v4l2,v4l2_mem2mem
videobuf2_common       45056  4 bcm2835_codec,bcm2835_v4l2,v4l2_mem2mem,videobuf2_v4l2
videodev              200704  6 bcm2835_codec,v4l2_common,videobuf2_common,bcm2835_v4l2,v4l2_mem2mem,videobuf2_v4l2
media                  36864  3 bcm2835_codec,videodev,v4l2_mem2mem
vc_sm_cma              36864  1 bcm2835_mmal_vchiq
w1_gpio                16384  0
wire                   45056  1 w1_gpio
rpivid_mem             16384  0
cn                     16384  1 wire
hwmon                  16384  2 wire,raspberrypi_hwmon
uio_pdrv_genirq        16384  0
uio                    20480  1 uio_pdrv_genirq
i2c_dev                20480  2
ip_tables              24576  0
x_tables               32768  1 ip_tables
ipv6                  454656  30
pi@raspberrypi:~ $ 

 

05/03/2020

Posted by:
andrew

Last edited: 05/03/2020

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Location:
United Kingdom

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Hello hwissing

I tried setting up a new raspbian image and after running through the steps in our owfs tutorial my Raspberry Pi was showing duplicates for each 1 wire device so it appears to be a problem with either the most recent version of Raspbian Linux or owfs.

I have found a possible fix that works on my Raspberry Pi and may work for you.

First you have to disable 1 Wire in raspi-config under Interfacing Options > P8 1 Wire.

Next add the ds2482 module into /etc/modules

sudo nano /etc/modules

Add the following to the bottom of the text file:

ds2482

Save and reboot your Raspberry Pi.

Once rebooted owfs should still work but you will still find duplicate devices in the /mnt/1wire folder.

To make it only show one version of each device you need to run the following command.

sudo owfs --w1

After running that command the duplicates should disappear and the remaining devices should work correctly.

You can make the change permanent by adding "owfs --w1" to /etc/rc.local before the last line "exit 0".

At the moment I am not sure why runninng the owfs --w1 command removes the duplicates but I will do a bit more research and once I understand the problem I will update our owfs tutorial.

AB Electronics UK Tech Support

08/03/2020

Posted by:
hwissing

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Thanks!

It works!

Regards

hwissing

25/04/2020

Posted by:
troxel

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I had the same issue with multiple device (ds18b20) being listed in the /mnt/1wire directory

I looked at the systemd status for owfs 

>  systemctl status owfs.service

and noticed the executed command has two -c /etc/owfs.conf. That is: 

   CGroup: /system.slice/owfs.service
           └─4319 /usr/lib/owfs/owfs -c /etc/owfs.conf -c /etc/owfs.conf --allow_other /run/owfs

Not sure why a repeated -c option. Looking at the service unit-file

ExecStart=/usr/bin/owfs -c /etc/owfs.conf --allow_other %t/owfs

Only one listed. I removed the -c option to:

ExecStart=/usr/bin/owfs --allow_other %t/owfs

Restarted and works fine with devices listed once! Yeah.  Somewhere an extra -c option is being added upon execution. If someone knows where the -c option is coming from I would be interested to know. 

 

25/04/2020

Posted by:
andrew

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Location:
United Kingdom

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Hello troxel

After doing some research the problem appears to be a bug within owfs.

I tried stopping the owfs service and then started owfs manually with no parameters:

sudo owfs

Looking at the running processes:

ps -aux|grep owf

The following is shown for the owfs process:

root      1481  0.0  0.0  26156   632 ?        Ssl  12:41   0:00 /usr/lib/owfs/owfs -c /etc/owfs.conf

It looks like the "-c /etc/owfs.conf" has been hard coded into the owfs executable and each time "-c /etc/owfs.conf" is parsed it creates a duplicate set of folders in /mnt/1wire.

I verified the problem by adding an extra "-c /etc/owfs.conf" into the ExecStart line in /lib/systemd/system/owfs.service.  After restarting there were three sets of folders in /mnt/1wire.

I couldn't find any reference to "/etc/owfs.conf" in the official owfs github repository so it looks like the bug is in the version of owfs available in the Raspbian apt repository.

I will add a note into our owfs tutorial explaining how to fix the bug using the method you found.

 

AB Electronics UK Tech Support

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