An Amazon IoT Events detector model for crane monitoring - Amazon IoT Events
Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China (PDF).

End of support notice: On May 20, 2026, Amazon end support for Amazon IoT Events. After May 20, 2026, you will no longer be able to access the Amazon IoT Events console or Amazon IoT Events resources. For more information, visit this Amazon IoT Events end of support.

An Amazon IoT Events detector model for crane monitoring

Monitor your equipment or device fleets for failures or changes in operation, and trigger actions when such events occur. You define detector models in JSON which specify states, rules, and actions. This allows you to monitor inputs like temperature and pressure, track threshold breaches, and send alerts. The examples show detector models for a crane and motor, detecting overheating issues and notifying by Amazon SNS when a threshold is exceeded. You can update models to refine behavior without disrupting monitoring.

File: craneDetectorModel.json

{
    "detectorModelName": "craneDetectorModel",
    "detectorModelDefinition": {
        "states": [
            {
                "stateName": "Running",
                "onEnter": {
                    "events": [
                        {
                            "eventName": "init",
                            "condition": "true",
                            "actions": [
                                {
                                    "setVariable": {
                                        "variableName": "craneThresholdBreached",
                                        "value": "0"
                                    }
                                }
                            ]
                        }
                    ]
                },
                "onInput": {
                    "events": [
                        {
                            "eventName": "Overheated",
                            "condition": "$input.TemperatureInput.temperature > 35",
                            "actions": [
                                {
                                    "setVariable": {
                                        "variableName": "craneThresholdBreached",
                                        "value": "$variable.craneThresholdBreached + 1"
                                    }
                                }
                            ]
                        },
                        {
                            "eventName": "Crane Threshold Breached",
                            "condition": "$variable.craneThresholdBreached > 5",
                            "actions": [
                                {
                                    "sns": {
                                        "targetArn": "arn:aws:sns:us-east-1:123456789012:CraneSNSTopic"
                                    }
                                }
                            ]
                        },
                        {
                            "eventName": "Underheated",
                            "condition": "$input.TemperatureInput.temperature < 25",
                            "actions": [
                                {
                                    "setVariable": {
                                        "variableName": "craneThresholdBreached",
                                        "value": "0"
                                    }
                                }
                            ]
                        }
                    ]
                }
            }
        ],
        "initialStateName": "Running"
    },
    "key": "craneid",
    "roleArn": "arn:aws:iam::123456789012:role/columboSNSRole"
}

To update an existing detector model. File: updateCraneDetectorModel.json

{
    "detectorModelName": "craneDetectorModel",
    "detectorModelDefinition": {
        "states": [
            {
                "stateName": "Running",
                "onEnter": {
                    "events": [
                        {
                            "eventName": "init",
                            "condition": "true",
                            "actions": [
                                {
                                    "setVariable": {
                                        "variableName": "craneThresholdBreached",
                                        "value": "0"
                                    }
                                },
                                {
                                    "setVariable": {
                                        "variableName": "alarmRaised",
                                        "value": "'false'"
                                    }
                                }
                            ]
                        }
                    ]
                },
                "onInput": {
                    "events": [
                        {
                            "eventName": "Overheated",
                            "condition": "$input.TemperatureInput.temperature > 30",
                            "actions": [
                                {
                                    "setVariable": {
                                        "variableName": "craneThresholdBreached",
                                        "value": "$variable.craneThresholdBreached + 1"
                                    }
                                }
                            ]
                        },
                        {
                            "eventName": "Crane Threshold Breached",
                            "condition": "$variable.craneThresholdBreached > 5 && $variable.alarmRaised == 'false'",
                            "actions": [
                                {
                                    "sns": {
                                        "targetArn": "arn:aws:sns:us-east-1:123456789012:CraneSNSTopic"
                                    }
                                },
                                {
                                    "setVariable": {
                                        "variableName": "alarmRaised",
                                        "value": "'true'"
                                    }
                                }
                            ]
                        },
                        {
                            "eventName": "Underheated",
                            "condition": "$input.TemperatureInput.temperature < 10",
                            "actions": [
                                {
                                    "setVariable": {
                                        "variableName": "craneThresholdBreached",
                                        "value": "0"
                                    }
                                }
                            ]
                        }
                    ]
                }
            }
        ],
        "initialStateName": "Running"
    },
    "roleArn": "arn:aws:iam::123456789012:role/columboSNSRole"
}

File: motorDetectorModel.json

{
    "detectorModelName": "motorDetectorModel",
    "detectorModelDefinition": {
        "states": [
            {
                "stateName": "Running",
                "onEnter": {
                    "events": [
                        {
                            "eventName": "init",
                            "condition": "true",
                            "actions": [
                                {
                                    "setVariable": {
                                        "variableName": "motorThresholdBreached",
                                        "value": "0"
                                    }
                                }
                            ]
                        }
                    ]
                },
                "onInput": {
                    "events": [
                        {
                            "eventName": "Overheated And Overpressurized",
                            "condition": "$input.PressureInput.pressure > 70 && $input.TemperatureInput.temperature > 30",
                            "actions": [
                                {
                                    "setVariable": {
                                        "variableName": "motorThresholdBreached",
                                        "value": "$variable.motorThresholdBreached + 1"
                                    }
                                }
                            ]
                        },
                        {
                            "eventName": "Motor Threshold Breached",
                            "condition": "$variable.motorThresholdBreached > 5",
                            "actions": [
                                {
                                    "sns": {
                                        "targetArn": "arn:aws:sns:us-east-1:123456789012:MotorSNSTopic"
                                    }
                                }
                            ]
                        }
                    ]
                }
            }
        ],
        "initialStateName": "Running"
    },
    "key": "motorId",
    "roleArn": "arn:aws:iam::123456789012:role/columboSNSRole"
}

To update an existing detector model. File: updateMotorDetectorModel.json

{
    "detectorModelName": "motorDetectorModel",
    "detectorModelDefinition": {
        "states": [
            {
                "stateName": "Running",
                "onEnter": {
                    "events": [
                        {
                            "eventName": "init",
                            "condition": "true",
                            "actions": [
                                {
                                    "setVariable": {
                                        "variableName": "motorThresholdBreached",
                                        "value": "0"
                                    }
                                }
                            ]
                        }
                    ]
                },
                "onInput": {
                    "events": [
                        {
                            "eventName": "Overheated And Overpressurized",
                            "condition": "$input.PressureInput.pressure > 70 && $input.TemperatureInput.temperature > 30",
                            "actions": [
                                {
                                    "setVariable": {
                                        "variableName": "motorThresholdBreached",
                                        "value": "$variable.motorThresholdBreached + 1"
                                    }
                                }
                            ]
                        },
                        {
                            "eventName": "Motor Threshold Breached",
                            "condition": "$variable.motorThresholdBreached > 5",
                            "actions": [
                                {
                                    "sns": {
                                        "targetArn": "arn:aws:sns:us-east-1:123456789012:MotorSNSTopic"
                                    }
                                }
                            ]
                        }
                    ]
                }
            }
        ],
        "initialStateName": "Running"
    },
    "roleArn": "arn:aws:iam::123456789012:role/columboSNSRole"
}