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digitemp_DS9097 - Online in the Cloud

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This is the command digitemp_DS9097 that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

NAME


digitemp - program to read from 1-wire temperature sensors.

SYNOPSIS


digitemp [options]

DESCRIPTION


DigiTemp uses the Dallas 1-wire bus to read temperatures from digital sensors attached to
a serial port adapter. It handles initializing the bus, searching for attached devices,
reading devices and custom log strings. It supports the following temperature devices:
DS1820, DS18S20, DS18B20, DS1822

It also handles the DS2406 1-wire hub switches, and DS2422 and DS2423 counters.

DigiTemp uses either the DS9097 passive serial port adapter, or the DS2480B based DS9097U
adapter. 1-wire adapters from ibuttonlink.com, such as the Link45 are also supported.

OPTIONS


At least 1 action must be given, along with some optional arguments. Actions are one (and
only on) of the -w -t -a -w options

-h, -? Show summary of options.

-v Show verbose output.

-i Initialize .digitemprc file, search the bus for all supported devices.

-I Initialize .digitemprc file, search the bus for all supported devices, store
devices in sorted serial # order.

-w Walk the full device tree and display the serial number and type of all devices
detected on the bus.

-s /dev/ttyS0
Set serial port to use. Make sure you have permission to access this port. For USB
operation pass USB instead of /dev/ttySX

-l /var/log/temperature
Send output to logfile, the output format is defined by the .B -o command

-c digitemp.conf
Set digitemp configuration file. The default is .digitemprc in the current
directory.

-r 1000
Read delay in ms. This sets the amount of time to wait between sending the
temperature conversion command and reading the result. The DS18S20 takes about
750mS to do the temperature conversion. Default is 1000mS (1 sec).

-t # Read sensor number #, the # depends on the order of the sensors in the .digitemprc
file.

-q Quiet output, no copyright banner.

-a Read all sensors.

-A Treat DS2438 as A/D converter, output raw voltages and currents.

-d 5 Delay between samples (in seconds).

-n 50 Number of times to repeat the command.

-O"counter format string"
See Counter Format below.

-o [1..3] ["output format string"]
See Temperature Format below.

-H"Humidity format string"
See Humidity Format below.

Temperature Format


The temperature format can be either a numeric value, or a string. The numeric values
select pre-configured output formats:

1 = One line per sensor, time, C, F (default)
2 = One line per sample, elapsed time, temperature in C
3 = Same as #2, except temperature is in F

#2 and #3 have the data separated by tabs, suitable for import into a spreadsheet or other
graphing software.

The format string uses strftime tokens plus 5 special ones for DigiTemp:

%s for sensor #

%C for centigrade

%F for fahrenheit

%R to output the hex serial number

%N for seconds since Epoch.

The case of the token is important! The default format string is: "%b %d %H:%M:%S Sensor
%s C: %.2C F: %.2F" which gives you an output of: May 24 21:25:43 Sensor 0 C: 23.66 F:
74.59

The DS2438 sensor can be used for a variety of things. It includes a temperature sensor
and A/D converter. DigiTemp defaults to using it as a humidity sensor. The raw voltages
and currents can be displayed by passing the -A argument

When the -o2 or -o3 log options are used the attached DS2438's temperatures will be output
without the humidity.

Counter Format String


The counter format string is similar, adding these tokens:

%n is the counter #, which depends on its position in the .digitemprc file

%C is the count in decimal.

Humidity Format String


The Humidity format string is the same as the temperature format string with the addition
of this format specifier:

%h is the humidity in 0-100%

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