Using AWS Lambda for IoT Data Processing

AWS_lambda_workflow.png

  1. In our IoT system, AWS Lambda functions serve as the main processor of incoming data from IoT devices, such as temperature or humidity readings.
  2. A Lambda function can be triggered by API Gateway when a device sends an HTTP POST request with sensor data. The function can:
    1. Parse the JSON payload from the request.
    2. Extract the sensor data (e.g., temperature, humidity, timestamp).
    3. Store the data in DynamoDB for long-term storage and analysis.
Note

Another Lambda function can retrieve data when an HTTP GET request is made (e.g. /data/latest).

This function queries DynamoDB for the latest record associated with a device.