Ubuntu Manpage: owdir, owread, owwrite, owget, owexist, owpresent

Provided by: ow-shell_3.1p1-2ubuntu1_amd64

NAME

       owdir, owread, owwrite, owget, owexist, owpresent - lightweight owserver access

SYNOPSIS

   Minimal options
       owdir -s [host:]port [directory]
       owread -s [host:]port filepath
       owwrite -s [host:]port filepath value
       owget -s [host:]port [directory] | filepath

   Server discovery
       owdir --autoserver [directory]
       owread --autoserver filepath
       owwrite --autoserver filepath value
       owget --autoserver [directory] | filepath

   Full options
       owdir  -q  --quiet  -f  --format  f[.]i[[.]c]  ]  [  --dir  ]  -s  [host:]port [directory]
       [directory2 ...]

       owread -q --quiet -C --celsius -K --kelvin -F  --fahrenheit  -R  --rankine  [  --hex  ]  [
       --start= offset ] [ --size= bytes ] -s [host:]port filepath [filepath2 ...]

       owwrite  -q  --quiet  -C  --celsius  -K  --kelvin -F --fahrenheit -R --rankine [ --hex ] [
       --start= offset ] -s [host:]port filepath value [filepath2 value2 ...]

       owget -q --quiet -f --format f[.]i[[.]c] -C  --celsius  -K  --kelvin  -F  --fahrenheit  -R
       --rankine  [  --hex  ]  [  --start=  offset  ]  [ --size= bytes ] [ --dir ] -s [host:]port
       [directory] | filepath

   Version
       owdir -V --version
       owread -V --version
       owwrite -V --version
       owget -V --version

   Help
       owdir -h | --help
       owread -h | --help
       owwrite -h | --help
       owget -h | --help

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 principle 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.

OWSHELL programs
owdir owread owwrite and owget are collectively called the owshell programs. They allow
lightweight access to an owserver (1) for use in command line scripts.

Unlike owserver (1) owhttpd (1) owftpd (1) owhttpd (1) there is not persistent connection
with the 1-wire bus, no caching and no multithreading. Instead, each program connects to a
running owserver (1) and performs a quick set of queries.

owserver (1) performs the actual 1-wire connection (to physical 1-wire busses or other
owserver programs), performs concurrency locking, caching, and error collection.

owshell programs are intended for use in command line scripts. An alternative approach is
to mount an owfs (1) filesystem and perform direct file lists, reads and writes.

owdir
owdir performs a directory listing. With no argument, all the devices on the main 1-wire
bus will be listed. Given the name of a 1-wire device, the available properties will be
listed. It is the equivalent of

ls directory

in the owfs (1) filesystem.

owread
owread obtains for value of a 1-wire device property. e.g. 28.0080BE21AA00/temperature
gives the DS18B20 temperature. It is the equivalent of

cat filepath

in the owfs (1) filesystem.

owwrite
owwrite performs a change of a property, changing a 1-wire device setting or writing to
memory. It is the equivalent of

echo value > filepath

in the owfs (1) filesystem.

owget
owget (1) is a convenience program, combining the function of owdir (1) and owread (1) by
first trying to read the argument as a directory, and if that fails as a 1-wire property.

STANDARD OPTIONS

   --autoserver
       Find  an  owserver  using the Service Discovery protocol. Essentially Apple's Bonjour (aka
       zeroconf). Only the first owserver will be used, and that choice is probably arbitrary.

   -s [host:]port
       Connect via tcp (network) to an owserver process that is connected to  a  physical  1-wire
       bus.  This  allows  multiple  processes to share the same bus. The owserver process can be
       local or remote.

       If the server option is not specified, the default is  the  local  machine  and  the  IANA
       allocated default port of 4304. Thus "-s localhost:4304" is the equivalent.

DATA OPTIONS

--hex

       Hexidecimal  mode.  For  reading  data,  each  byte  of character will be displayed as two
       characrters 0-9ABCDEF. Most useful for reading memory locations. No spaces between data.

       Writing data in hexidecimal mode just means that the data should  be  given  as  one  long
       hexidecimal string.

--start=offset

       Read  or  write memory locations starting at the offset byte rather than the beginning. An
       offset of 0 means the beginning (and is the default).

--size=bytes

       Read up to the specified number of bytes of a memory location.

HELP OPTIONS

   -h --help
       Shows (this) basic summary of options.

   -V --version
       Version of this program.

DISPLAY OPTIONS

   --dir
       Modify the display of directories to  indicate  which  entries  are  also  directories.  A
       directory member will have a trailing '/' if it is a directory itself. This aids recursive
       searches.

   -f --format f[.]i[[.]c]
       Display format for the 1-wire devices. Each device has a 8 byte 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.

EXAMPLE

       owdir -s 3000 --format fic
              Get the device listing (full 16 hex digits, no dots) from  the  local  owserver  at
              port 3000

       owread -F --autoserver 51.125499A32000/typeK/temperature
              Read  temperature from the DS2751-based thermocouple on an auto-discovered owserver
              Temperature in fahrenheit.

       owwrite -s 10.0.1.2:3001 32.000800AD23110/pages/page.1 "Passed"
              Connect to a OWFS server process ( owserver ) that was started on  another  machine
              at tcp port 3001 and write to the memory of a DS2780

AVAILABILITY

       http://www.owfs.org

AUTHOR

       Paul Alfille (paul.alfille@gmail.com)

NAME

SYNOPSIS

DESCRIPTION

STANDARD OPTIONS

DATA OPTIONS

--hex

--start=offset

--size=bytes

HELP OPTIONS

DISPLAY OPTIONS

EXAMPLE

SEE ALSO

AVAILABILITY

AUTHOR