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DS1822(3)                    One-Wire File System                    DS1822(3)


NAME

       DS1822 - Econo 1-Wire Digital Thermometer


SYNOPSIS

       Thermometer.

       22 [.]XXXXXXXXXXXX[XX][/[

       See the file man3/temperatures_mini.3so.

       | die | power | temphigh | templow | trim | trimblanket | trimvalid |

       See the file man3/standard_mini.3so.

       ]]


FAMILY CODE

       22


SPECIAL PROPERTIES

   power
       read-only,yes-no
       Is the chip powered externally (=1) or from the parasitically from the
       data bus (=0)?

   temperature
       read-only, floating point
       Measured temperature with 12 bit resolution.

   temperature9 temperature10 temperature11 temperature12
       read-only, floating point Measured temperature at 9 to 12 bit
       resolution. There is a tradeoff of time versus accuracy in the
       temperature measurement.

   fasttemp
       read-only, floating point
       Equivalent to temperature9

       See the file man3/temperature_threshold.3so.

       See the file man3/temperature_errata.3so.


STANDARD PROPERTIES

       See the file man3/standard.3so.


DESCRIPTION

       See the file man3/description.3so.

   DS1822
       The DS1822 (3) is one of several available 1-wire temperature sensors.
       Alternatives are the DS18S20 (3), DS18B20 (3) as well as
       temperature/voltage measurements in the DS2436 (3) and DS2438 (3).  For
       truly versatile temperature measurements, see the protean DS1921 (3)
       Thermachron (3).

       Although the DS1822 (3) can select between 4 resolutions, this program
       simplifies the interface by only implementing the fastest/roughest and
       slowest/best.


ADDRESSING

       See the file man3/addressing.3so.


DATASHEET

       http://pdfserv.maxim-ic.com/en/ds/DS1822.pdf


SEE ALSO

       See the file man3/seealso.3so.


AVAILABILITY

       http://www.owfs.org


AUTHOR

       Paul Alfille (paul.alfille@gmail.com)

OWFS Manpage                         2003                            DS1822(3)

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