Paul,
Your comment about "two processes competing for the same resource" made me
think of my random problem with temperature values of "-62". My config file is
just like the one at:
http://owfs.org/index.php?page=quickstart-guide
Except I (thought I had) commented the "server: FAKE = DS18S20,DS2405" line,
and added "server: w1" right under the "#server: usb = all" line.
---
# With this setup, any client (but owserver) uses owserver on the
# local machine...
! server: server = localhost:4304
#
# ...and owserver uses the real hardware, by default fake devices
# This part must be changed on real installation
! server: FAKE = DS18S20,DS2405
#
# USB device: DS9490
#server: usb = all
server: w1
---
I think I just learned something... The manpage says:
---
server: opt = value # only owserver effected by this line
! server: opt = value # owserver NOT effected by this line
---
What I missed until now is that "! server:" apparently DOES apply to everything
BUT owserver. That makes sense of the first command copied above - it tells
everyone except server to read from server.
When I took '!' for another type of comment character, and used it before
"server: FAKE = DS18S20,DS2405" it didn't stop the fake devices from appearing.
So that has been telling everybody except owserver to read the fake devices
directly... But owserver was not reading them, so not a resource competition?
And they shouldn't affect the real hardware devices? Changing "!" to '#' and
"sudo service owhttpd restart" has eliminated the fake devices.
When I added "server: w1", it did cause owserver (or someone) to read my
configured BBB hardware pin. So I guess that must be correct.
While poking around the http display, I notice:
NET_connection_errors 58
All the other error counts are 0.
This is with:
---
statistics/read
bytes 8652
cachebytes 0
cachesuccess 0
calls 484
success 484
tries.ALL 492, 6, 6
tries.0 493
tries.1 6
tries.2 6
---
Still the same 58 errors at 524 reads. I can't find any explanation of what
NET_connection_errors are. Or why tries.ALL is always 8 more than calls... Or
the difference between tries.0/1/2?
New issue... For no obvious reason (but see below), the real devices
disappeared from the web page, and after a few more tries the web page refused
to load. The filesystem is still visible and temperatures are still being
updated, but apparently both server and httpd are gone:
---
root@arm:/home/ubuntu# /etc/init.d/owhttpd status
* owhttpd is not running
root@arm:/home/ubuntu# /etc/init.d/owserver status
* owserver is not running
---
When I first tried to restart http using sudo, it gave no error, but didn't
work.
---
ubuntu@arm:~$ sudo service owhttpd stop
* Stopping 1-Wire HTTP Daemon owhttpd
[ OK ]
ubuntu@arm:~$ sudo service owhttpd start
* Starting 1-Wire HTTP Daemon owhttpd
[ OK ]
ubuntu@arm:~$ sudo service owhttpd status
* owhttpd is not running
---
Maybe it won't start if server is not running? When I switched to real root and
started server first, it worked again.
--> BUT - if owserver is the only module that reads actual hardware devices,
and it was not running, who was maintaining the filesystem and updating the
temperatures?
At the "top" of the http page, only bus.0 shows. But if I click bus.0, the new
page shows bus.1 as well, and it appears my real devices are on bus.1. What
does this mean?
Also on that bus.0 page (and on the top page) is "simultaneous":
---
bus.0/simultaneous
uncached version
up directory
present Error: Input/output error
present_ds2400 Error: Software caused connection abort
single Error: Software caused connection abort
single_ds2400 Error: Software caused connection abort
temperature Error: Software caused connection abort
voltage Error: Software caused connection abort
---
Aha! Visiting that page kills owserver! That's what made the page loads fail
earlier. At least now I know what not to do...
Sorry if these are all obvious newbie questions,
Loren
| Loren Amelang | [email protected] |
> 3. Re: Missing data (Paul Alfille)
> Date: Sun, 26 Oct 2014 07:12:41 -0400
> From: Paul Alfille <[email protected]>
> Subject: Re: [Owfs-developers] Missing data
> To: "OWFS (One-wire file system) discussion and help"
> <[email protected]>
> Message-ID:
> <CAP_SGzeYU0Aabs5kLnPW=n4t0toau8jnfzjs6l1mdmn8nff...@mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Well there's always the possibility that there is a wiring problem, but
> also there could be two processes competing for the same resource.
>
> Is owserver and owfs running at the same time? Your configuration file
> would have them both grabbing the same serial devices and stepping on each
> other.
>
> If they both run at the same time, owfs should connect to owserver and
> have owserver make the exclusive hardware connection.
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