ENTITY-SENSOR-MIB

EntitySensorDataType1 = other2 = unknown3 = voltsAC4 = voltsDC5 = amperes6 = watts7 = hertz8 = celsius9 = percentRH10 = rpm11 = cmm12 = truthvalueAn object using this data type represents the Entity Sensor measurement data type associated with a physical sensor value. The actual data units are determined by examining an object of this type together with the associated EntitySensorDataScale object. An object of this type SHOULD be defined together with objects of type EntitySensorDataScale and EntitySensorPrecision. Together, associated objects of these three types are used to identify the semantics of an object of type EntitySensorValue. Valid values are: other(1): a measure other than those listed below unknown(2): unknown measurement, or arbitrary, relative numbers voltsAC(3): electric potential voltsDC(4): electric potential amperes(5): electric current watts(6): power hertz(7): frequency celsius(8): temperature percentRH(9): percent relative humidity rpm(10): shaft revolutions per minute cmm(11),: cubic meters per minute (airflow) truthvalue(12): value takes { true(1), false(2) } · Integer32

The type of data returned by the associated entPhySensorValue object. This object SHOULD be set by the agent during entry creation, and the value SHOULD NOT change during operation.

EntitySensorDataScale1 = yocto2 = zepto3 = atto4 = femto5 = pico6 = nano7 = micro8 = milli9 = units10 = kilo11 = mega12 = giga13 = tera14 = exa15 = peta16 = zetta17 = yottaAn object using this data type represents a data scaling factor, represented with an International System of Units (SI) prefix. The actual data units are determined by examining an object of this type together with the associated EntitySensorDataType object. An object of this type SHOULD be defined together with objects of type EntitySensorDataType and EntitySensorPrecision. Together, associated objects of these three types are used to identify the semantics of an object of type EntitySensorValue.Reference: The International System of Units (SI), National Institute of Standards and Technology, Spec. Publ. 330, August 1991. · Integer32

The exponent to apply to values returned by the associated entPhySensorValue object. This object SHOULD be set by the agent during entry creation, and the value SHOULD NOT change during operation.

EntitySensorPrecisionAn object using this data type represents a sensor precision range. An object of this type SHOULD be defined together with objects of type EntitySensorDataType and EntitySensorDataScale. Together, associated objects of these three types are used to identify the semantics of an object of type EntitySensorValue. If an object of this type contains a value in the range 1 to 9, it represents the number of decimal places in the fractional part of an associated EntitySensorValue fixed- point number. If an object of this type contains a value in the range -8 to -1, it represents the number of accurate digits in the associated EntitySensorValue fixed-point number. The value zero indicates the associated EntitySensorValue object is not a fixed-point number. Agent implementors must choose a value for the associated EntitySensorPrecision object so that the precision and accuracy of the associated EntitySensorValue object is correctly indicated. For example, a physical entity representing a temperature sensor that can measure 0 degrees to 100 degrees C in 0.1 degree increments, +/- 0.05 degrees, would have an EntitySensorPrecision value of '1', an EntitySensorDataScale value of 'units(9)', and an EntitySensorValue ranging from '0' to '1000'. The EntitySensorValue would be interpreted as 'degrees C * 10'. (-8..9) · Integer32

The number of decimal places of precision in fixed-point sensor values returned by the associated entPhySensorValue object. This object SHOULD be set to '0' when the associated entPhySensorType value is not a fixed-point type: e.g., 'percentRH(9)', 'rpm(10)', 'cmm(11)', or 'truthvalue(12)'. This object SHOULD be set by the agent during entry creation, and the value SHOULD NOT change during operation.

EntitySensorValueAn object using this data type represents an Entity Sensor value. An object of this type SHOULD be defined together with objects of type EntitySensorDataType, EntitySensorDataScale and EntitySensorPrecision. Together, associated objects of those three types are used to identify the semantics of an object of this data type. The semantics of an object using this data type are determined by the value of the associated EntitySensorDataType object. If the associated EntitySensorDataType object is equal to 'voltsAC(3)', 'voltsDC(4)', 'amperes(5)', 'watts(6), 'hertz(7)', 'celsius(8)', or 'cmm(11)', then an object of this type MUST contain a fixed point number ranging from -999,999,999 to +999,999,999. The value -1000000000 indicates an underflow error. The value +1000000000 indicates an overflow error. The EntitySensorPrecision indicates how many fractional digits are represented in the associated EntitySensorValue object. If the associated EntitySensorDataType object is equal to 'percentRH(9)', then an object of this type MUST contain a number ranging from 0 to 100. If the associated EntitySensorDataType object is equal to 'rpm(10)', then an object of this type MUST contain a number ranging from -999,999,999 to +999,999,999. If the associated EntitySensorDataType object is equal to 'truthvalue(12)', then an object of this type MUST contain either the value 'true(1)' or the value 'false(2)'. If the associated EntitySensorDataType object is equal to 'other(1)' or unknown(2)', then an object of this type MUST contain a number ranging from -1000000000 to 1000000000. (-1000000000..1000000000) · Integer32

The most recent measurement obtained by the agent for this sensor. To correctly interpret the value of this object, the associated entPhySensorType, entPhySensorScale, and entPhySensorPrecision objects must also be examined.

EntitySensorStatus1 = ok2 = unavailable3 = nonoperationalAn object using this data type represents the operational status of a physical sensor. The value 'ok(1)' indicates that the agent can obtain the sensor value. The value 'unavailable(2)' indicates that the agent presently cannot obtain the sensor value. The value 'nonoperational(3)' indicates that the agent believes the sensor is broken. The sensor could have a hard failure (disconnected wire), or a soft failure such as out- of-range, jittery, or wildly fluctuating readings. · Integer32

The operational status of the sensor.

SnmpAdminStringAn octet string containing administrative information, preferably in human-readable form. To facilitate internationalization, this information is represented using the ISO/IEC IS 10646-1 character set, encoded as an octet string using the UTF-8 transformation format described in [RFC2279]. Since additional code points are added by amendments to the 10646 standard from time to time, implementations must be prepared to encounter any code point from 0x00000000 to 0x7fffffff. Byte sequences that do not correspond to the valid UTF-8 encoding of a code point or are outside this range are prohibited. The use of control codes should be avoided. When it is necessary to represent a newline, the control code sequence CR LF should be used. The use of leading or trailing white space should be avoided. For code points not directly supported by user interface hardware or software, an alternative means of entry and display, such as hexadecimal, may be provided. For information encoded in 7-bit US-ASCII, the UTF-8 encoding is identical to the US-ASCII encoding. UTF-8 may require multiple bytes to represent a single character / code point; thus the length of this object in octets may be different from the number of characters encoded. Similarly, size constraints refer to the number of encoded octets, not the number of characters represented by an encoding. Note that when this TC is used for an object that is used or envisioned to be used as an index, then a SIZE restriction MUST be specified so that the number of sub-identifiers for any object instance does not exceed the limit of 128, as defined by [RFC3416]. Note that the size of an SnmpAdminString object is measured in octets, not characters. SIZE (0..255) · OCTET STRING · hint 255t

A textual description of the data units that should be used in the display of entPhySensorValue.

TimeStampThe value of the sysUpTime object at which a specific occurrence happened. The specific occurrence must be defined in the description of any object defined using this type. If sysUpTime is reset to zero as a result of a re- initialization of the network management (sub)system, then the values of all TimeStamp objects are also reset. However, after approximately 497 days without a re- initialization, the sysUpTime object will reach 2^^32-1 and then increment around to zero; in this case, existing values of TimeStamp objects do not change. This can lead to ambiguities in the value of TimeStamp objects. · TimeTicks

The value of sysUpTime at the time the status and/or value of this sensor was last obtained by the agent.

Unsigned32 · milliseconds

An indication of the frequency that the agent updates the associated entPhySensorValue object, representing in milliseconds. The value zero indicates: - the sensor value is updated on demand (e.g., when polled by the agent for a get-request), - the sensor value is updated when the sensor value changes (event-driven), - the agent does not know the update rate.