detectorModel.json

 {
  "detectorModelName": "sensorDetectorModel",
  "detectorModelDefinition": {
    "states": [
      {
        "stateName": "Normal",
        "onEnter": {
          "events": [
            {
              "eventName": "init",
              "condition": "true",
              "actions": [
                {
                  "setVariable": {
                    "variableName": "moistureThresholdBreached",
                    "value": "0"
                  }
                }
              ]
            }
          ]
        },
        "onInput": {
          "transitionEvents": [
            {
              "eventName": "Overpressurized",
              "condition": "$input.moistureInput.sensorData.moisture > 70",
              "actions": [
                {
                  "setVariable": {
                    "variableName": "moistureThresholdBreached",
                    "value": "$variable.moistureThresholdBreached + 3"
                  }
                }
              ],
              "nextState": "Dangerous"
            }
          ]
        }
      }, 
      {
        "stateName": "Dangerous",
        "onEnter": {
          "events": [
            {
              "eventName": "Moisture Threshold Breached",
              "condition": "$variable.MoistureThresholdBreached > 1",
              "actions": [
                {
                  "sns": {
                    "targetArn": "arn:aws:sns:us-east-1:123456789012:overMoisturedAction"
                  }
                }
              ]
            }
          ]
        },
        "onInput": {
          "events": [
            {
              "eventName": "OverMoisturized",
              "condition": "$input.MoistureInput.sensorData.moisture > 70",
              "actions": [
                {
                  "setVariable": {
                    "variableName": "moistureThresholdBreached",
                    "value": "3"
                  }
                }
              ]
            },
            {
              "eventName": "Moisture Okay",
              "condition": "$input.MoistureInput.sensorData.moisture <= 70",
              "actions": [
                {
                  "setVariable": {
                    "variableName": "moistureThresholdBreached",
                    "value": "$variable.moistureThresholdBreached - 1"
                  }
                }
              ]
            }
          ],
          "transitionEvents": [
            {
              "eventName": "BackToNormal",
              "condition": "$input.MoistureInput.sensorData.moisture <= 70 && $variable.moistureThresholdBreached <= 1",
              "nextState": "Normal"
            }
          ]
        },
        "onExit": {
          "events": [
            {
              "eventName": "Normal Moisture Restored",
              "condition": "true",
              "actions": [
                {
                  "sns": {
                    "targetArn": "arn:aws:sns:us-east-1:123456789012:moistureClearedAction"
                  }
                }
              ]
            }
          ]
        }
      }
    ],
    "initialStateName": "Normal"
  },
  "key" : "sensor",
  "roleArn": "arn:aws:iam::123456789012:role/IoTEventsRole"
}