Barometer This IPSO object should be used with an air pressure sensor to report a barometer measurement. It also provides resources for minimum/maximum measured values and the minimum/maximum range that can be measured by the barometer sensor. An example measurement unit is pascals. 3315 urn:oma:lwm2m:ext:3315 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.