Product node

• A parameter from a node that precedes this Product Node.
• A specific device under the current Product.

• Device action execution: Set a property or call a service.
• Query device properties: Query the snapshot or historical value of a device property.
• Query other device information: Query other information about a device, such as its basic information, thing model details, and event data.

Send a command to the device to set a specific property or call a specific service.

The data format for setting properties is as follows:

{
   "properties": {
    "identifierForProperty1": "targetValue",
    "identifierForProperty2": "targetValue"
   }
}

You can select all properties or a specific property.

• Snapshot value: The latest reported value of the property.
• Historical value: Query the historical records of a single property reported within a specified time range. You must configure the start time, end time, number of records, and sort order.

  The following example shows the data format for the request:

  {
     "start": 1526900000000, // The start time for the historical data query (timestamp in milliseconds).
     "end": 1526900000001, // The end time for the historical data query (timestamp in milliseconds).
     "pageSize": 10,  // The number of records to query.
     "ordered": true // The query order (true for chronological order, false for reverse chronological order).
  }

  Note

  • If you select chronological order, the query returns the first 10 property records from the start time.
  • If you select reverse chronological order, the query returns the last 10 property records between the start and end times.

From the drop-down list, select the type of information to query and provide the required parameters. For details on the parameters required for each type, see the API documentation in the Thing Management service.

You can set parameters as variables. IoT Studio provides the following built-in global variables:

• Output data from the previous node: payload. Use payload.key_in_payload_object to access a specific key's value.
• Data from the service input node: query. For example, input parameters for an HTTP Request node or device data from a Device Trigger node. Use query.parameter_name to access a specific parameter's value.
• Output data from a specific node: node.node_ID. Use node.node_ID.key_in_node_output to access a specific key's value in the node's output.

Example:

{
   "productKey": "{{payload.productKey}}",  // The previous node's output is {productKey: 'value'}. Retrieves the value of productKey.
   "deviceName": "{{query.deviceName}}", // An input parameter named deviceName is defined in the API request node. This retrieves the value of deviceName.
   "pageNum": "{{node.node_399591c0.pageNum}}" // The output of node_399591c0 is pageNum. This retrieves the value of pageNum.
}

To access a nested value within a parameter, use the following format:

Use {{payload.props.PM10.value}} to access the value of the PM10 property within the props object from the previous node's output.

Use {{query.deviceContext.deviceName}} to access the deviceName variable within the deviceContext object from the first node's output.