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DIGITEMP(1) General Commands Manual DIGITEMP(1) 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/cuau0 Set serial port to use. Make sure you have permission to access this port. For USB operation pass USB instead of /dev/cuauX -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 re- sult. The DS18S20 takes about 750mS to do the temperature con- version. 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 Dig- iTemp: %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 tempera- tures 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 .digitem- prc 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% AUTHOR This manual page was written by Jesus Roncero <jesus@roncero.org>, for the Debian project (but may be used by others). Modifications by Brian C. Lane <bcl@brianlane.com> UPDATES DigiTemp updates can be found on the http://www.digitemp.com website. August 2008 DIGITEMP(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | Temperature Format | Counter Format String | Humidity Format String | AUTHOR | UPDATES
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