# UpdateDetectorModel
**Important**
End of support notice: On May 20,2026, Amazon will 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, see [Amazon IoT Events end of support](https://docs.amazonaws.cn/iotevents/latest/developerguide/iotevents-end-of-support.html).
Updates a detector model. Detectors (instances) spawned by the previous version are deleted and then re-created as new inputs arrive.
## Request Syntax
```
POST /detector-models/detectorModelName HTTP/1.1
Content-type: application/json
{
"detectorModelDefinition": {
"initialStateName": "string",
"states": [
{
"onEnter": {
"events": [
{
"actions": [
{
"clearTimer": {
"timerName": "string"
},
"dynamoDB": {
"hashKeyField": "string",
"hashKeyType": "string",
"hashKeyValue": "string",
"operation": "string",
"payload": {
"contentExpression": "string",
"type": "string"
},
"payloadField": "string",
"rangeKeyField": "string",
"rangeKeyType": "string",
"rangeKeyValue": "string",
"tableName": "string"
},
"dynamoDBv2": {
"payload": {
"contentExpression": "string",
"type": "string"
},
"tableName": "string"
},
"firehose": {
"deliveryStreamName": "string",
"payload": {
"contentExpression": "string",
"type": "string"
},
"separator": "string"
},
"iotEvents": {
"inputName": "string",
"payload": {
"contentExpression": "string",
"type": "string"
}
},
"iotSiteWise": {
"assetId": "string",
"entryId": "string",
"propertyAlias": "string",
"propertyId": "string",
"propertyValue": {
"quality": "string",
"timestamp": {
"offsetInNanos": "string",
"timeInSeconds": "string"
},
"value": {
"booleanValue": "string",
"doubleValue": "string",
"integerValue": "string",
"stringValue": "string"
}
}
},
"iotTopicPublish": {
"mqttTopic": "string",
"payload": {
"contentExpression": "string",
"type": "string"
}
},
"lambda": {
"functionArn": "string",
"payload": {
"contentExpression": "string",
"type": "string"
}
},
"resetTimer": {
"timerName": "string"
},
"setTimer": {
"durationExpression": "string",
"seconds": number,
"timerName": "string"
},
"setVariable": {
"value": "string",
"variableName": "string"
},
"sns": {
"payload": {
"contentExpression": "string",
"type": "string"
},
"targetArn": "string"
},
"sqs": {
"payload": {
"contentExpression": "string",
"type": "string"
},
"queueUrl": "string",
"useBase64": boolean
}
}
],
"condition": "string",
"eventName": "string"
}
]
},
"onExit": {
"events": [
{
"actions": [
{
"clearTimer": {
"timerName": "string"
},
"dynamoDB": {
"hashKeyField": "string",
"hashKeyType": "string",
"hashKeyValue": "string",
"operation": "string",
"payload": {
"contentExpression": "string",
"type": "string"
},
"payloadField": "string",
"rangeKeyField": "string",
"rangeKeyType": "string",
"rangeKeyValue": "string",
"tableName": "string"
},
"dynamoDBv2": {
"payload": {
"contentExpression": "string",
"type": "string"
},
"tableName": "string"
},
"firehose": {
"deliveryStreamName": "string",
"payload": {
"contentExpression": "string",
"type": "string"
},
"separator": "string"
},
"iotEvents": {
"inputName": "string",
"payload": {
"contentExpression": "string",
"type": "string"
}
},
"iotSiteWise": {
"assetId": "string",
"entryId": "string",
"propertyAlias": "string",
"propertyId": "string",
"propertyValue": {
"quality": "string",
"timestamp": {
"offsetInNanos": "string",
"timeInSeconds": "string"
},
"value": {
"booleanValue": "string",
"doubleValue": "string",
"integerValue": "string",
"stringValue": "string"
}
}
},
"iotTopicPublish": {
"mqttTopic": "string",
"payload": {
"contentExpression": "string",
"type": "string"
}
},
"lambda": {
"functionArn": "string",
"payload": {
"contentExpression": "string",
"type": "string"
}
},
"resetTimer": {
"timerName": "string"
},
"setTimer": {
"durationExpression": "string",
"seconds": number,
"timerName": "string"
},
"setVariable": {
"value": "string",
"variableName": "string"
},
"sns": {
"payload": {
"contentExpression": "string",
"type": "string"
},
"targetArn": "string"
},
"sqs": {
"payload": {
"contentExpression": "string",
"type": "string"
},
"queueUrl": "string",
"useBase64": boolean
}
}
],
"condition": "string",
"eventName": "string"
}
]
},
"onInput": {
"events": [
{
"actions": [
{
"clearTimer": {
"timerName": "string"
},
"dynamoDB": {
"hashKeyField": "string",
"hashKeyType": "string",
"hashKeyValue": "string",
"operation": "string",
"payload": {
"contentExpression": "string",
"type": "string"
},
"payloadField": "string",
"rangeKeyField": "string",
"rangeKeyType": "string",
"rangeKeyValue": "string",
"tableName": "string"
},
"dynamoDBv2": {
"payload": {
"contentExpression": "string",
"type": "string"
},
"tableName": "string"
},
"firehose": {
"deliveryStreamName": "string",
"payload": {
"contentExpression": "string",
"type": "string"
},
"separator": "string"
},
"iotEvents": {
"inputName": "string",
"payload": {
"contentExpression": "string",
"type": "string"
}
},
"iotSiteWise": {
"assetId": "string",
"entryId": "string",
"propertyAlias": "string",
"propertyId": "string",
"propertyValue": {
"quality": "string",
"timestamp": {
"offsetInNanos": "string",
"timeInSeconds": "string"
},
"value": {
"booleanValue": "string",
"doubleValue": "string",
"integerValue": "string",
"stringValue": "string"
}
}
},
"iotTopicPublish": {
"mqttTopic": "string",
"payload": {
"contentExpression": "string",
"type": "string"
}
},
"lambda": {
"functionArn": "string",
"payload": {
"contentExpression": "string",
"type": "string"
}
},
"resetTimer": {
"timerName": "string"
},
"setTimer": {
"durationExpression": "string",
"seconds": number,
"timerName": "string"
},
"setVariable": {
"value": "string",
"variableName": "string"
},
"sns": {
"payload": {
"contentExpression": "string",
"type": "string"
},
"targetArn": "string"
},
"sqs": {
"payload": {
"contentExpression": "string",
"type": "string"
},
"queueUrl": "string",
"useBase64": boolean
}
}
],
"condition": "string",
"eventName": "string"
}
],
"transitionEvents": [
{
"actions": [
{
"clearTimer": {
"timerName": "string"
},
"dynamoDB": {
"hashKeyField": "string",
"hashKeyType": "string",
"hashKeyValue": "string",
"operation": "string",
"payload": {
"contentExpression": "string",
"type": "string"
},
"payloadField": "string",
"rangeKeyField": "string",
"rangeKeyType": "string",
"rangeKeyValue": "string",
"tableName": "string"
},
"dynamoDBv2": {
"payload": {
"contentExpression": "string",
"type": "string"
},
"tableName": "string"
},
"firehose": {
"deliveryStreamName": "string",
"payload": {
"contentExpression": "string",
"type": "string"
},
"separator": "string"
},
"iotEvents": {
"inputName": "string",
"payload": {
"contentExpression": "string",
"type": "string"
}
},
"iotSiteWise": {
"assetId": "string",
"entryId": "string",
"propertyAlias": "string",
"propertyId": "string",
"propertyValue": {
"quality": "string",
"timestamp": {
"offsetInNanos": "string",
"timeInSeconds": "string"
},
"value": {
"booleanValue": "string",
"doubleValue": "string",
"integerValue": "string",
"stringValue": "string"
}
}
},
"iotTopicPublish": {
"mqttTopic": "string",
"payload": {
"contentExpression": "string",
"type": "string"
}
},
"lambda": {
"functionArn": "string",
"payload": {
"contentExpression": "string",
"type": "string"
}
},
"resetTimer": {
"timerName": "string"
},
"setTimer": {
"durationExpression": "string",
"seconds": number,
"timerName": "string"
},
"setVariable": {
"value": "string",
"variableName": "string"
},
"sns": {
"payload": {
"contentExpression": "string",
"type": "string"
},
"targetArn": "string"
},
"sqs": {
"payload": {
"contentExpression": "string",
"type": "string"
},
"queueUrl": "string",
"useBase64": boolean
}
}
],
"condition": "string",
"eventName": "string",
"nextState": "string"
}
]
},
"stateName": "string"
}
]
},
"detectorModelDescription": "string",
"evaluationMethod": "string",
"roleArn": "string"
}
```
## URI Request Parameters
The request uses the following URI parameters.
** [detectorModelName](#API_UpdateDetectorModel_RequestSyntax) **
The name of the detector model that is updated.
Length Constraints: Minimum length of 1. Maximum length of 128.
Pattern: `^[a-zA-Z0-9_-]+$`
Required: Yes
## Request Body
The request accepts the following data in JSON format.
** [detectorModelDefinition](#API_UpdateDetectorModel_RequestSyntax) **
Information that defines how a detector operates.
Type: [DetectorModelDefinition](API_DetectorModelDefinition.md) object
Required: Yes
** [detectorModelDescription](#API_UpdateDetectorModel_RequestSyntax) **
A brief description of the detector model.
Type: String
Length Constraints: Maximum length of 1024.
Required: No
** [evaluationMethod](#API_UpdateDetectorModel_RequestSyntax) **
Information about the order in which events are evaluated and how actions are executed.
Type: String
Valid Values: `BATCH | SERIAL`
Required: No
** [roleArn](#API_UpdateDetectorModel_RequestSyntax) **
The ARN of the role that grants permission to Amazon IoT Events to perform its operations.
Type: String
Length Constraints: Minimum length of 1. Maximum length of 2048.
Required: Yes
## Response Syntax
```
HTTP/1.1 200
Content-type: application/json
{
"detectorModelConfiguration": {
"creationTime": number,
"detectorModelArn": "string",
"detectorModelDescription": "string",
"detectorModelName": "string",
"detectorModelVersion": "string",
"evaluationMethod": "string",
"key": "string",
"lastUpdateTime": number,
"roleArn": "string",
"status": "string"
}
}
```
## Response Elements
If the action is successful, the service sends back an HTTP 200 response.
The following data is returned in JSON format by the service.
** [detectorModelConfiguration](#API_UpdateDetectorModel_ResponseSyntax) **
Information about how the detector model is configured.
Type: [DetectorModelConfiguration](API_DetectorModelConfiguration.md) object
## Errors
For information about the errors that are common to all actions, see [Common Error Types](CommonErrors.md).
** InternalFailureException **
An internal failure occurred.
** message **
The message for the exception.
HTTP Status Code: 500
** InvalidRequestException **
The request was invalid.
** message **
The message for the exception.
HTTP Status Code: 400
** ResourceInUseException **
The resource is in use.
** message **
The message for the exception.
HTTP Status Code: 409
** ResourceNotFoundException **
The resource was not found.
** message **
The message for the exception.
HTTP Status Code: 404
** ServiceUnavailableException **
The service is currently unavailable.
** message **
The message for the exception.
HTTP Status Code: 503
** ThrottlingException **
The request could not be completed due to throttling.
** message **
The message for the exception.
HTTP Status Code: 429
## See Also
For more information about using this API in one of the language-specific Amazon SDKs, see the following:
+ [Amazon Command Line Interface V2](https://docs.amazonaws.cn/goto/cli2/iotevents-2018-07-27/UpdateDetectorModel)
+ [Amazon SDK for .NET V4](https://docs.amazonaws.cn/goto/DotNetSDKV4/iotevents-2018-07-27/UpdateDetectorModel)
+ [Amazon SDK for C\$1\$1](https://docs.amazonaws.cn/goto/SdkForCpp/iotevents-2018-07-27/UpdateDetectorModel)
+ [Amazon SDK for Go v2](https://docs.amazonaws.cn/goto/SdkForGoV2/iotevents-2018-07-27/UpdateDetectorModel)
+ [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/iotevents-2018-07-27/UpdateDetectorModel)
+ [Amazon SDK for JavaScript V3](https://docs.amazonaws.cn/goto/SdkForJavaScriptV3/iotevents-2018-07-27/UpdateDetectorModel)
+ [Amazon SDK for Kotlin](https://docs.amazonaws.cn/goto/SdkForKotlin/iotevents-2018-07-27/UpdateDetectorModel)
+ [Amazon SDK for PHP V3](https://docs.amazonaws.cn/goto/SdkForPHPV3/iotevents-2018-07-27/UpdateDetectorModel)
+ [Amazon SDK for Python](https://docs.amazonaws.cn/goto/boto3/iotevents-2018-07-27/UpdateDetectorModel)
+ [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/iotevents-2018-07-27/UpdateDetectorModel)