Humidity This IPSO object should be used with a humidity sensor to report a humidity measurement. It also provides resources for minimum/maximum measured values and the minimum/maximum range that can be measured by the humidity sensor. An example measurement unit is relative humidity as a percentage. 3304 urn:oma:lwm2m:ext:3304 1.0 1.0 Multiple Optional Sensor Value R Single Mandatory Float Last or Current Measured Value from the Sensor. Min Measured Value R Single Optional Float The minimum value measured by the sensor since power ON or reset. Max Measured Value R Single Optional Float The maximum value measured by the sensor since power ON or reset. Min Range Value R Single Optional Float The minimum value that can be measured by the sensor. Max Range Value R Single Optional Float The maximum value that can be measured by the sensor. Sensor Units R Single Optional String Measurement Units Definition. Reset Min and Max Measured Values E Single Optional Reset the Min and Max Measured Values to Current Value.