Provided by: owfs-fuse_2.8p15-1ubuntu4_amd64 bug

NAME

       owfs - 1-wire filesystem

SYNOPSIS

       owfs [ -c config ] -d serialport | -u | -s [host:]port -m mountdir

DESCRIPTION

   1-Wire
       1-wire  is  a  wiring  protocol  and series of devices designed and manufactured by Dallas
       Semiconductor, Inc. The bus is a low-power low-speed low-connector scheme where  the  data
       line can also provide power.

       Each  device  is  uniquely  and  unalterably numbered during manufacture. There are a wide
       variety of devices, including memory, sensors (humidity,  temperature,  voltage,  contact,
       current),  switches,  timers  and  data  loggers.  More complex devices (like thermocouple
       sensors) can be built with these basic devices. There are also 1-wire  devices  that  have
       encryption included.

       The  1-wire  scheme uses a single bus master and multiple slaves on the same wire. The bus
       master initiates  all  communication.  The  slaves  can  be  individually  discovered  and
       addressed using their unique ID.

       Bus  masters  come in a variety of configurations including serial, parallel, i2c, network
       or USB adapters.

   OWFS design
       OWFS is a suite of programs that designed to make the 1-wire bus and  its  devices  easily
       accessible.  The underlying priciple is to create a virtual filesystem, with the unique ID
       being the directory, and the individual properties of the device are represented as simple
       files that can be read and written.

       Details of the individual slave or master design are hidden behind a consistent interface.
       The goal is to provide an easy set of tools for a software designer to  create  monitoring
       or  control  applications.  There are some performance enhancements in the implementation,
       including data caching,  parallel  access  to  bus  masters,  and  aggregation  of  device
       communication.  Still  the  fundemental  goal  has  been  ease  of  use,  flexibility  and
       correctness rather than speed.

   owfs
       owfs (1) is the filesystem client of the OWFS  family  of  programs.  It  runs  on  linux,
       freebsd   and   Mac   OS   X,   and   requires   the   fuse  kernel  module  and  library.
       (http://fuse.sourceforge.net) which is a user-mode filesystem driver.

       Essentially, the entire 1-wire bus is mounted to a  place  in  your  filesystem.  All  the
       1-wire  devices  are  accessible  using  standard  file operations (read, write, directory
       listing). The system is safe, no actual files are exposed, these files  are  virtual.  Not
       all  operations are supported. Specifically, file creation, deletion, linking and renaming
       are not allowed. (You can link from outside to a owfs file, but not the other way around).

Device Options (1-wire Bus Master)

       These options specify the device (bus master) connecting the computer to the  1-wire  bus.
       The  1-wire  slaves are connected to the 1-wire bus, and the bus master connects to a port
       on the computer and controls the 1-wire bus. The bus master is either an  actual  physical
       device, the kernel w1 module, or an owserver (1).

       At  least  one device option is required. There is no default. More than one device can be
       listed,  and  all  will  be  used.  (A  logical  union  unless  you  explore  the  /bus.n/
       directories.)

       Linux  and  BSD  enforce  a security policy restricting access to hardware ports. You must
       have sufficient rights to access the given port or access will silently fail.

* Serial devices

       port specifies a serial port, e.g.  /dev/ttyS0

       -d port | --device=port (DS2480B)
              DS2480B-based bus master (like the DS9097U or the LINK in emulation mode).  If  the
              adapter doesn't respond, a passive type (DS9907E or diode/resistor) circuit will be
              assumed.

       --serial_flextime | --serial_regulartime (DS2480B)
              Changes details of bus timing (see DS2480B datasheet). Some devices, like the Swart
              LCD cannot work with flextime.

       --baud=1200|9600|19200|38400|57600|115200 (DS2480B,LINK,HA5)
              Sets  the  initial  serial  port  communication  speed for all bus masters. Not all
              serial devices support all speeds. You can change the individual bus  master  speed
              for  the LINK and DS2880B in the interface/settings directory. The HA5 speed is set
              in hardware, so the command line buad rate should match that rate.
              Usually the default settings (9600 for LINK and DS2480B ) and 115200  for  the  HA5
              are sane and shouldn't be changed.

       --straight_polarity  | --reverse_polarity (DS2480B)
              Reverse polarity of the DS2480B output transistors? Not needed for the DS9097U, but
              required for some other designs.

       --link=port (LINK)
              iButtonLink LINK adapter (all  versions)  in  non-emulation  mode.  Uses  an  ascii
              protocol over serial.

       --ha7e=port (HA7E)
              Embedded Data Systems HA7E adapter ( and HA7S ) in native ascii mode.

       --ha5=port | --ha5=port:a | --ha5=port:acg (HA5)
              Embedded  Data Systems HA5 mutidrop adapter in native ascii mode. Up to 26 adapters
              can share the same port, each with an assigned letter. If no letter specified,  the
              program will scan for the first response (which may be slow).

       --checksum | --no_checksum (HA5)
              Turn on (default) or off the checksum feature of the HA5 communication.

       --passive=port | --ha2=port | --ha3=port | --ha4b=port (Passive)
              Passive  1-wire  adapters. Powered off the serial port and using passive electrical
              components (resitors and diodes).

       --8bit | --6bit (Passive)
              Synthesize the 1-wire waveforme using a 6-bit (default) serial word, or 8-bit word.
              Not all UART devices support 6 bit operation.

       --timeout_serial=5
              Timeout  (in  seconds)  for  all  serial  communications.  5 second default. Can be
              altered dynamically under /settings/timeout/serial

* USB devices

       The only supported true USB bus masters are based on the DS2490 chip. The most  common  is
       the DS9490R which has an included 1-wire ID slave with family code 81.

       There  are also bus masters based on the serial chip with a USB to serial conversion built
       in. These are supported by the serial bus master protocol.

       -u | --usb
              DS2490 based bus master (like the DS9490R).

       -u2 | --usb=2
              Use the second USB bus master. (The order isn't  predicatble,  however,  since  the
              operating system does not conssitently order USB devices).

       -uall | --usb=ALL
              Use all the USB devices.

       --usb_flextime | --usb_regulartime
              Changes the details of 1-wire waveform timing for certain network configurations.

       --altusb
              Willy Robion's alternative USB timing.

       --timeout_usb=5
              Timeout  for  USB  communications.  This  has a 5 second default and can be changed
              dynamically under /settings/timeout/usb

* I2C devices

       I2C is  2 wire protocol used for chip-to-chip communication. The bus masters:  DS2482-100,
       DS2482-101  and DS2482-800 can specify (via pin voltages) a subset of addresses on the i2c
       bus. Those choices are

       i2c_address

       0,1,2,3
              0x18,0x19,0x1A,0x1B

       4,5,6,7
              0x1C,0x1D,0x1E,0x1F (DS2482-800 only)

       port for i2c masters have the form /dev/i2c-0, /dev/i2c-1, ...

       -d port | --device=port
              This simple form only permits a specific port and the first available i2c_address

       --i2c=port | --i2c=port:i2c_address | --i2c=port:ALL
              Specific i2c port and the i2c_address is either the  first,  specific,  or  all  or
              them. The i2c_address is 0,1,2,...

       --i2c | --i2c=: | --i2c=ALL:ALL
              Search  the  available  i2c  buses  for  either  the first, the first, or every i2c
              adapter.

       The DS2482-800 masters 8 1-wire buses and so will generate 8 /bus.n entries.

* Network devices

       These bus masters communicate via the tcp/ip  network  protocol  and  so  can  be  located
       anywhere on the network.  The network_address is of the form tcp_address:port

       E.g. 192.168.0.1:3000 or localhost:3000

       --link=network_address
              LinkHubE network LINK adapter by iButtonLink

       --ha7net=network_address | --ha7net
              HA7Net  network  1-wire  adapter  with  specified  tcp address or discovered by udp
              multicast. By Embedded Data Systems
              --timeout_ha7=60 specific timeout for HA7Net communications (60 second default).

       --etherweather=network_address
              Etherweather adapter

       -s network_address | --server=network_address
              Location of an owserver (1) program that talks to the 1-wire bus. The default  port
              is 4304.

       --timeout_network=5
              Timeout  for network bus master communications. This has a 1 second default and can
              be changed dynamically under /settings/timeout/network

* Simulated devices

       Used for testing and development. No actual hardware is needed. Useful for separating  the
       hardware development from the rest of the software design.

       devices
              is  a  list of comma-separated 1-wire devices in the following formats. Note that a
              valid CRC8 code is created automatically.

       10,05,21
              Hexidecimal family codes (the DS18S20, DS2405 and DS1921 in this example).

       10.12AB23431211
              A more complete hexidecimal unique address. Useful when an actual  hardware  device
              should be simulated.

       DS2408,DS2489
              The 1-wire device name. (Full ID cannot be speciifed in this format).

       --fake=devices
              Random  address  and  random  values  for  each  read. The device ID is also random
              (unless specified).

       --temperature_low=12 --temperature_high=44
              Specify the temperature limits for the fake adapter simulation. These should be  in
              the same temperature scale that is specified in the command line. It is possible to
              change     the     limits     dynamically     for      each      adapter      under
              /bus.x/interface/settings/simulated/[temperature_low|temperature_high]

       --tester=devices
              Predictable  address and predictable values for each read. (See the website for the
              algorhythm).

* w1 kernel module

       This a linux-specific option for using the operating system's access to bus masters.  Root
       access  is  required  and  the implementation was still in progress as of owfs v2.7p12 and
       linux 2.6.30.

       Bus masters are recognized and added dynamically. Details of the physical bus  master  are
       not accessible, bu they include USB, i2c and a number of GPIO designs on embedded boards.

       Access  is  restrict  to  superuser  due to the netlink broadcast protocol employed by w1.
       Multitasking must be configured (threads) on the compilation.

       --w1   Use the linux kernel w1 virtual bus master.

       --timeout_w1=10
              Timeout for w1 netlink communications. This has a 10  second  default  and  can  be
              changed dynamically under /settings/timeout/w1

SPECIFIC OPTIONS

   -m --mountpoint=directory_path
       Path of a directory to mount the 1-wire file system

       The mountpoint is required. There is no default.

   --allow_other
       Shorthand  for  fuse  mount  option  "-o  allow_other"  Allows uther users to see the fuse
       (owfs) mount point and file system. Requires a setting in /etc/fuse.conf as well.

   --fuse-opt options
       Sends options to the fuse-mount process. Options should be quoted, e.g. "

TEMPERATURE SCALE OPTIONS

   -C --Celsius
   -F --Fahrenheit
   -K --Kelvin
   -R --Rankine
       Temperature scale used for data output. Celsius is the default.

       Can also be changed within the program at /settings/units/temperature_scale

PRESSURE SCALE OPTIONS

   --mbar (default)
   --atm
   --mmHg
   --inHg
   --psi
   --Pa
       Pressure scale used for data output. Millibar is the default.

       Can also be changed within the program at /settings/units/pressure_scale

FORMAT OPTIONS

       Choose the representation of the 1-wire unique identifiers. OWFS uses these identifiers as
       unique directory names.

       Although  several  display  formats  are  selectable,  all must be in family-id-crc8 form,
       unlike some other programs and the labelling on iButtons, which are crc8-id-family form.

   -f --format="f[.]i[[.]c]"
       Display format for the 1-wire devices. Each device has a 8byte address, consisting of:

       f      family code, 1 byte

       i      ID number, 6 bytes

       c      CRC checksum, 1 byte

       Possible formats are f.i (default, 01.A1B2C3D4E5F6), fi fic f.ic f.i.c and fi.c

       All formats are accepted as input, but the output will be in the specified format.

       The address elements can be retrieved from a device entry in owfs by the  family,  id  and
       crc8  properties,  and  as  a  whole  with  address.   The  reversed id and address can be
       retrieved as r_id and r_address.

JOB CONTROL OPTIONS

   -r --readonly
   -w --write
       Do we allow writing to the 1-wire bus (writing memory, setting  switches,  limits,  PIOs)?
       The write option is available for symmetry, it's the default.

   -P --pid-file filename
       Places  the  PID  --  process  ID  of owfs into the specified filename. Useful for startup
       scripts control.

   --background | --foreground
       Whether the program releases the console and  runs  in  the  background  after  evaluating
       command line options.  background is the default.

   --error_print=0|1|2|3
       =0     default mixed destination: stderr foreground / syslog background

       =1     syslog only

       =2     stderr only

       =3     /dev/null (quiet mode).

   --error_level=0..9
       =0     default errors only

       =1     connections/disconnections

       =2     all high level calls

       =3     data summary for each call

       =4     details level

       >4     debugging chaff

       --error_level=9 produces a lot of output

CONFIGURATION FILE

   -c file | --configuration file
       Name of an owfs (5) configuration file with more command line parameters

       On Debian, owfs (1) always reads /etc/owfs.conf

HELP OPTIONS

       See also this man page and the web site http://www.owfs.org

   -h --help=[device|cache|program|job|temperature]
       Shows basic summary of options.

       device 1-wire bus master options

       cache  cache and communication size and timing

       program
              mountpoint or TCP server settings

       job    control and debugging options

       temperature
              Unique ID display format and temperature scale

   -V --version
       Version of this program and related libraries.

TIME OPTIONS

       Timeouts  for  the bus masters were previously listed in Device options.  Timeouts for the
       cache affect the time that data stays in memory. Default values are shown.

   --timeout_volatile=15
       Seconds until a volatile property expires in the  cache.  Volatile  properties  are  those
       (like temperature) that change on their own.

       Can be changed dynamically at /settings/timeout/volatile

   --timeout_stable=300
       Seconds  until  a  stable  property expires in the cache. Stable properties are those that
       shouldn't change unless explicitly changed. Memory contents for example.

       Can be changed dynamically at /settings/timeout/stable

   --timeout_directory=60
       Seconds until a directory listing expires in the cache. Directory  lists  are  the  1-wire
       devices found on the bus.

       Can be changed dynamically at /settings/timeout/directory

   --timeout_presence=120
       Seconds until the presence and bus location of a 1-wire device expires in the cache.

       Can be changed dynamically at /settings/timeout/presence

       There are also timeouts for specific program responses:

   --timeout_server=5
       Seconds until the expected response from the owserver (1) is deemed tardy.

       Can be changed dynamically at /settings/timeout/server

   --timeout_ftp=900
       Seconds that an ftp session is kept alive.

       Can be changed dynamically at /settings/timeout/ftp

EXAMPLE

       owfs -d /dev/ttyS0 -m /mnt/1wire
              Bus master on serial port

       owfs -F -u -m /mnt/1wire
              USB adapter, temperatures reported in Fahrenheit

       owfs -s 10.0.1.2:4304 -m /mnt/1wire
              Connect  to an owserver (1) process that was started on another machine at tcp port
              4304

SEE ALSO

   Programs
       owfs (1) owhttpd (1) owftpd (1) owserver (1) owdir (1) owread (1)  owwrite  (1)  owpresent
       (1) owtap (1)

   Configuration and testing
       owfs (5) owtap (1) owmon (1)

   Language bindings
       owtcl (3) owperl (3) owcapi (3)

   Clocks
       DS1427 (3) DS1904(3) DS1994 (3) DS2404 (3) DS2404S (3) DS2415 (3) DS2417 (3)

   ID
       DS2401 (3) DS2411 (3) DS1990A (3)

   Memory
       DS1982  (3)  DS1985  (3) DS1986 (3) DS1991 (3) DS1992 (3) DS1993 (3) DS1995 (3) DS1996 (3)
       DS2430A (3) DS2431 (3) DS2433 (3) DS2502 (3) DS2506 (3) DS28E04 (3) DS28EC20 (3)

   Switches
       DS2405 (3) DS2406 (3) DS2408 (3) DS2409 (3) DS2413 (3) DS28EA00 (3)

   Temperature
       DS1822 (3) DS1825 (3) DS1820 (3) DS18B20 (3) DS18S20 (3) DS1920 (3) DS1921 (3) DS1821  (3)
       DS28EA00 (3) DS28E04 (3)

   Humidity
       DS1922 (3)

   Voltage
       DS2450 (3)

   Resistance
       DS2890 (3)

   Multifunction (current, voltage, temperature)
       DS2436  (3)  DS2437  (3) DS2438 (3) DS2751 (3) DS2755 (3) DS2756 (3) DS2760 (3) DS2770 (3)
       DS2780 (3) DS2781 (3) DS2788 (3) DS2784 (3)

   Counter
       DS2423 (3)

   LCD Screen
       LCD (3) DS2408 (3)

   Crypto
       DS1977 (3)

   Pressure
       DS2406 (3) -- TAI8570

AVAILABILITY

       http://www.owfs.org

AUTHOR

       Paul Alfille (paul.alfille@gmail.com)