owshell(1)

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

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 buses 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.

--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.

-h --help

Shows (this) basic summary of options.

-V --version

Version of this program.

--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.