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**To simulate a pipeline activity**
The following ``run-pipeline-activity`` example simulates the results of running a pipeline activity on a message payload. ::
aws iotanalytics run-pipeline-activity \
--pipeline-activity file://maths.json \
--payloads file://payloads.json
Contents of ``maths.json``::
{
"math": {
"name": "MyMathActivity",
"math": "((temp - 32) * 5.0) / 9.0",
"attribute": "tempC"
}
}
Contents of ``payloads.json``::
[
"{\"humidity\": 52, \"temp\": 68 }",
"{\"humidity\": 52, \"temp\": 32 }"
]
Output::
{
"logResult": "",
"payloads": [
"eyJodW1pZGl0eSI6NTIsInRlbXAiOjY4LCJ0ZW1wQyI6MjB9",
"eyJodW1pZGl0eSI6NTIsInRlbXAiOjMyLCJ0ZW1wQyI6MH0="
]
}
For more information, see `RunPipelineActivity <https://docs.aws.amazon.com/iotanalytics/latest/APIReference/API_RunPipelineActivity.html>`__ in the *AWS IoT Analytics API Reference*.