Let me confirm that you physically disconnected the DS2762 rather than just
external power?
On Apr 16, 2014 4:05 AM, "Ors Tiszay" <listaku...@gmail.com> wrote:
> Hi,
>
> I have owfs running on a Gumstix Overo Earth, with a DS9490 bus master,
> which in turn is connected to a Hobby-Boards DS2409-based 8 channel hub
> (bought years ago when the DS2409 was still around, wish they still were).
> The bus then branches out to several directions, carrying a total of ~10
> sensors, mostly DS18.20 with the odd DS18S20/HIH3610 combo thrown in, so
> far using ch1 main and the aux of the hub.
>
> On ch2 aux I have a DS2762 based moisture meter board. Board was working
> fine for a few days in test, but when I disconnected it to be moved to its
> final location, I noticed that the script taking the readings every 30
> seconds kept returning values even after the board was disconnected. More
> precisely, the values read are either 0 or very close to 0 (-7.8125E-05 for
> current), but the surprising thing is that the whole file structure remains
> in place even days after the board is disconnected:
>
> This is what it looks like 3 days after disconnecting the moisture meter
> board:
>
>
> # ls -al /mnt/owfs/1F.F96B08000000/aux # <- this is ch2 of the hub
> total 0
> drwxr-xr-x 1 root root 8 Apr 16 09:34 .
> drwxrwxrwx 1 root root 8 Apr 16 09:41 ..
>
>
> But reading the DS2762 as if it was still connected:
>
> # ls -al /mnt/owfs/1F.F96B08000000/aux/30.4CF9B8120000
> total 0
> drwxrwxrwx 1 root root 8 Apr 16 09:49 .
> drwxr-xr-x 1 root root 8 Apr 16 09:34 ..
> --w--w--w- 1 root root 1 Apr 16 09:49 PIO
> drwxrwxrwx 1 root root 8 Apr 16 09:49 WS603
> -r--r--r-- 1 root root 16 Apr 16 09:34 address
> -rw-rw-rw- 1 root root 256 Apr 16 09:34 alias
> -rw-rw-rw- 1 root root 12 Apr 16 09:49 amphours
> -rw-rw-rw- 1 root root 1 Apr 16 09:49 cc
> -rw-rw-rw- 1 root root 1 Apr 16 09:49 ce
> -rw-rw-rw- 1 root root 1 Apr 16 09:49 coc
> -r--r--r-- 1 root root 2 Apr 16 09:34 crc8
> -r--r--r-- 1 root root 12 Apr 16 09:34 current
> -rw-rw-rw- 1 root root 12 Apr 16 09:34 currentbias
> -rw-rw-rw- 1 root root 1 Apr 16 09:49 dc
> -rw-rw-rw- 1 root root 1 Apr 16 09:49 de
> -rw-rw-rw- 1 root root 1 Apr 16 09:49 defaultpmod
> -rw-rw-rw- 1 root root 1 Apr 16 09:49 defaultswen
> -rw-rw-rw- 1 root root 1 Apr 16 09:49 doc
> -r--r--r-- 1 root root 2 Apr 16 09:34 family
> -r--r--r-- 1 root root 12 Apr 16 09:34 id
> -r--r--r-- 1 root root 16 Apr 16 09:34 locator
> -rw-rw-rw- 1 root root 1 Apr 16 09:49 lock.0
> -rw-rw-rw- 1 root root 1 Apr 16 09:49 lock.1
> -rw-rw-rw- 1 root root 3 Apr 16 09:49 lock.ALL
> -rw-rw-rw- 1 root root 256 Apr 16 09:34 memory
> -r--r--r-- 1 root root 1 Apr 16 09:49 mstr
> -rw-rw-rw- 1 root root 1 Apr 16 09:49 ov
> drwxrwxrwx 1 root root 8 Apr 16 09:49 pages
> -r--r--r-- 1 root root 1 Apr 16 09:49 pmod
> -rw-rw-rw- 1 root root 1 Apr 16 09:49 ps
> -r--r--r-- 1 root root 16 Apr 16 09:34 r_address
> -r--r--r-- 1 root root 12 Apr 16 09:34 r_id
> -r--r--r-- 1 root root 16 Apr 16 09:34 r_locator
> -r--r--r-- 1 root root 1 Apr 16 09:49 sensed
> -r--r--r-- 1 root root 1 Apr 16 09:49 swen
> -r--r--r-- 1 root root 12 Apr 16 09:49 temperature
> -r--r--r-- 1 root root 32 Apr 16 09:34 type
> drwxrwxrwx 1 root root 8 Apr 16 09:49 typeB
> drwxrwxrwx 1 root root 8 Apr 16 09:49 typeE
> drwxrwxrwx 1 root root 8 Apr 16 09:49 typeJ
> drwxrwxrwx 1 root root 8 Apr 16 09:49 typeK
> drwxrwxrwx 1 root root 8 Apr 16 09:49 typeN
> drwxrwxrwx 1 root root 8 Apr 16 09:49 typeR
> drwxrwxrwx 1 root root 8 Apr 16 09:49 typeS
> drwxrwxrwx 1 root root 8 Apr 16 09:49 typeT
> -rw-rw-rw- 1 root root 1 Apr 16 09:49 uv
> -rw-rw-rw- 1 root root 12 Apr 16 09:49 vbias
> -r--r--r-- 1 root root 12 Apr 16 09:49 vis
> -r--r--r-- 1 root root 12 Apr 16 09:49 volt
> -rw-rw-rw- 1 root root 12 Apr 16 09:49 volthours
>
>
> # cat /mnt/owfs/1F.F96B08000000/aux/30.4CF9B8120000/type
> DS2760
>
> # cat /mnt/owfs/1F.F96B08000000/aux/30.4CF9B8120000/volt
> 0
>
> # cat /mnt/owfs/1F.F96B08000000/aux/30.4CF9B8120000/current
> -7.8125E-05
>
>
> Trying the same thing (ie.reading them after they're disconnected) with
> any other sensor returns file not found, as expected.
>
> Just out of curiosity I took this a bit further and tried reading from
> 30.4CF9B8120000
> via a port it was never connected to:
>
> # ls -al /mnt/owfs/1F.B06808000000/main/30.4CF9B8120000/
> total 0
> drwxrwxrwx 1 root root 8 Apr 16 09:59 .
> drwxr-xr-x 1 root root 8 Apr 16 09:34 ..
> --w--w--w- 1 root root 1 Apr 16 09:59 PIO
> drwxrwxrwx 1 root root 8 Apr 16 09:59 WS603
> -r--r--r-- 1 root root 16 Apr 16 09:34 address
> -rw-rw-rw- 1 root root 256 Apr 16 09:34 alias
> -rw-rw-rw- 1 root root 12 Apr 16 09:59 amphours
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 cc
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 ce
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 coc
> -r--r--r-- 1 root root 2 Apr 16 09:34 crc8
> -r--r--r-- 1 root root 12 Apr 16 09:34 current
> -rw-rw-rw- 1 root root 12 Apr 16 09:34 currentbias
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 dc
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 de
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 defaultpmod
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 defaultswen
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 doc
> -r--r--r-- 1 root root 2 Apr 16 09:34 family
> -r--r--r-- 1 root root 12 Apr 16 09:34 id
> -r--r--r-- 1 root root 16 Apr 16 09:34 locator
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 lock.0
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 lock.1
> -rw-rw-rw- 1 root root 3 Apr 16 09:59 lock.ALL
> -rw-rw-rw- 1 root root 256 Apr 16 09:34 memory
> -r--r--r-- 1 root root 1 Apr 16 09:59 mstr
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 ov
> drwxrwxrwx 1 root root 8 Apr 16 09:59 pages
> -r--r--r-- 1 root root 1 Apr 16 09:59 pmod
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 ps
> -r--r--r-- 1 root root 16 Apr 16 09:34 r_address
> -r--r--r-- 1 root root 12 Apr 16 09:34 r_id
> -r--r--r-- 1 root root 16 Apr 16 09:34 r_locator
> -r--r--r-- 1 root root 1 Apr 16 09:59 sensed
> -r--r--r-- 1 root root 1 Apr 16 09:59 swen
> -r--r--r-- 1 root root 12 Apr 16 09:59 temperature
> -r--r--r-- 1 root root 32 Apr 16 09:34 type
> drwxrwxrwx 1 root root 8 Apr 16 09:59 typeB
> drwxrwxrwx 1 root root 8 Apr 16 09:59 typeE
> drwxrwxrwx 1 root root 8 Apr 16 09:59 typeJ
> drwxrwxrwx 1 root root 8 Apr 16 09:59 typeK
> drwxrwxrwx 1 root root 8 Apr 16 09:59 typeN
> drwxrwxrwx 1 root root 8 Apr 16 09:59 typeR
> drwxrwxrwx 1 root root 8 Apr 16 09:59 typeS
> drwxrwxrwx 1 root root 8 Apr 16 09:59 typeT
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 uv
> -rw-rw-rw- 1 root root 12 Apr 16 09:59 vbias
> -r--r--r-- 1 root root 12 Apr 16 09:59 vis
> -r--r--r-- 1 root root 12 Apr 16 09:59 volt
> -rw-rw-rw- 1 root root 12 Apr 16 09:59 volthours
>
>
> And yet another one:
>
> # ls -al /mnt/owfs/1F.B06808000000/aux/30.4CF9B8120000/
> total 0
> drwxrwxrwx 1 root root 8 Apr 16 09:59 .
> drwxr-xr-x 1 root root 8 Apr 16 09:34 ..
> --w--w--w- 1 root root 1 Apr 16 09:59 PIO
> drwxrwxrwx 1 root root 8 Apr 16 09:59 WS603
> -r--r--r-- 1 root root 16 Apr 16 09:34 address
> -rw-rw-rw- 1 root root 256 Apr 16 09:34 alias
> -rw-rw-rw- 1 root root 12 Apr 16 09:59 amphours
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 cc
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 ce
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 coc
> -r--r--r-- 1 root root 2 Apr 16 09:34 crc8
> -r--r--r-- 1 root root 12 Apr 16 09:34 current
> -rw-rw-rw- 1 root root 12 Apr 16 09:34 currentbias
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 dc
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 de
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 defaultpmod
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 defaultswen
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 doc
> -r--r--r-- 1 root root 2 Apr 16 09:34 family
> -r--r--r-- 1 root root 12 Apr 16 09:34 id
> -r--r--r-- 1 root root 16 Apr 16 09:34 locator
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 lock.0
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 lock.1
> -rw-rw-rw- 1 root root 3 Apr 16 09:59 lock.ALL
> -rw-rw-rw- 1 root root 256 Apr 16 09:34 memory
> -r--r--r-- 1 root root 1 Apr 16 09:59 mstr
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 ov
> drwxrwxrwx 1 root root 8 Apr 16 09:59 pages
> -r--r--r-- 1 root root 1 Apr 16 09:59 pmod
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 ps
> -r--r--r-- 1 root root 16 Apr 16 09:34 r_address
> -r--r--r-- 1 root root 12 Apr 16 09:34 r_id
> -r--r--r-- 1 root root 16 Apr 16 09:34 r_locator
> -r--r--r-- 1 root root 1 Apr 16 09:59 sensed
> -r--r--r-- 1 root root 1 Apr 16 09:59 swen
> -r--r--r-- 1 root root 12 Apr 16 09:59 temperature
> -r--r--r-- 1 root root 32 Apr 16 09:34 type
> drwxrwxrwx 1 root root 8 Apr 16 09:59 typeB
> drwxrwxrwx 1 root root 8 Apr 16 09:59 typeE
> drwxrwxrwx 1 root root 8 Apr 16 09:59 typeJ
> drwxrwxrwx 1 root root 8 Apr 16 09:59 typeK
> drwxrwxrwx 1 root root 8 Apr 16 09:59 typeN
> drwxrwxrwx 1 root root 8 Apr 16 09:59 typeR
> drwxrwxrwx 1 root root 8 Apr 16 09:59 typeS
> drwxrwxrwx 1 root root 8 Apr 16 09:59 typeT
> -rw-rw-rw- 1 root root 1 Apr 16 09:59 uv
> -rw-rw-rw- 1 root root 12 Apr 16 09:59 vbias
> -r--r--r-- 1 root root 12 Apr 16 09:59 vis
> -r--r--r-- 1 root root 12 Apr 16 09:59 volt
> -rw-rw-rw- 1 root root 12 Apr 16 09:59 volthours
>
> Found this originally on 2.7p28, then quickly compiled a fresh one, all
> the prints above taken with:
>
> # owfs --version
> owfs version:
> 2.9p3
> libow version:
> 2.9p3
>
> I've also tried rebooting the gum of course, no change.
>
> Any ideas?
>
> cheers,
> Ors
>
>
>
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