AWSTemplateFormatVersion: '2010-09-09'
Transform: 'AWS::Serverless-2016-10-31'
Description: An AWS IoT trigger that logs events sent to the thing topic.
Resources:

  # Define the publisher Lambda function with permissions
  IOTProcessEventFunction:
    Type: 'AWS::Serverless::Function'
    Properties:
      Handler: app.handler
      Runtime: nodejs14.x
      CodeUri: src/
      Description: A Lambda function that logs the IoT events sent to a IoT Thing topic.
      MemorySize: 128
      Timeout: 3
      Events:
        MyIotThing:
          Type: IoTRule
          Properties:
            Sql:  SELECT * FROM "$aws/things/MyIotThing/*"
  
  # Define the IoT thing
  MyIotThing:
    Type: AWS::IoT::Thing
    Properties:
      ThingName: MyIotThing
      AttributePayload:
        Attributes:
          myAttributeA: AttributeAValue

Outputs:
  IOTProcessEventFunction:
    Description: IOTProcessEventFunction function name
    Value: !Ref IOTProcessEventFunction