User's Manual

Chapter 10: Using the Command Line Interface
289
config:#
sensor externalsensor <n> <sensor type> hysteresis <value>
Variables:
 <n> is the ID number of the environmental sensor that you want to
configure. The ID number is assigned and shown in the EMX web
interface. It is an integer between 1 and 16.
 <sensor type> is one of these sensor types: temperature, humidity,
airPressure or air Flow.
Note: If the specified sensor type does not match the type of the
specified environmental sensor, this error message appears:
"Specified sensor type 'XXX' does not match the sensor's type
(<sensortype>)," where XXX is the specified sensor type, and
<sensortype> is the correct sensor type.
 <value> is a numeric value that is assigned to the hysteresis for the
specified environmental sensor. See What is Deassertion
Hysteresis? (on page 182) for the function of the deassertion
hysteresis.
Example
The following command sets the deassertion hysteresis of the
environmental "temperature" sensor with the ID number 4 to 2 degrees
Celsius. That is, the temperature must drop by at least 2 degrees Celsius
below the upper threshold or rise by at least 2 degrees Celsius above the
lower threshold before any threshold-crossing event is deasserted.
config:#
sensor externalsensor 4 temperature hysteresis 2
Setting the Sensor's Assertion Timeout
This command syntax configures the assertion timeout value of a
numeric environmental sensor.