1[ 2 { 3 "Desc": { 4 "Name": "Virtual_CFM_Sensor", 5 "SensorType": "airflow" 6 }, 7 "Threshold": { 8 "CriticalHigh": 40, 9 "CriticalLow": 10, 10 "WarningHigh": 30, 11 "WarningLow": 15 12 }, 13 "Params": { 14 "ConstParam": [ 15 { 16 "ParamName": "P1", 17 "Value": 0.00565 18 }, 19 { 20 "ParamName": "P2", 21 "Value": 3.7427 22 } 23 ], 24 "DbusParam": [ 25 { 26 "ParamName": "P3", 27 "Desc": { 28 "Name": "SP_FAN0_TACH", 29 "SensorType": "fan_tach" 30 } 31 }, 32 { 33 "ParamName": "P4", 34 "Desc": { 35 "Name": "SP_FAN1_TACH", 36 "SensorType": "fan_tach" 37 } 38 } 39 ] 40 }, 41 "Expression": "(P3 * P1) + (P4 * P1) - P2" 42 } 43] 44