DS1822 − Econo 1-Wire Digital Thermometer
Thermometer.
22 [.]XXXXXXXXXXXX[XX][/[ | latesttemp | die | power | temphigh | templow | tempres | trim | trimblanket | trimvalid | ]]
22
read-only,yes-no
Is the chip powered externally (=1) or from the
parasitically from the data bus (=0)?
read-only,
floating point
Measured temperature with 12 bit resolution.
read-only,
floating point
Measured temperature at 9 to 12 bit resolution. There is a
tradeoff of time versus accuracy in the temperature
measurement.
read-only,
floating point
Measured temperature at 9 to 12 bit resolution, depending on
the resolution of the latest conversion on this chip.
Reading this node will never trigger a temperature
conversion. Intended for use in conjunction with
/simultaneous/temperature.
read-only,
floating point
Equivalent to temperature9
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.
http://pdfserv.maxim-ic.com/en/ds/DS1822.pdf
http://www.owfs.org
Paul Alfille ([email protected])