How to attach my lambda function to IoT Analytics pipeline

Hello,

I created my lambda function that converts string data to temperature. I use IoT analytics for data collection and visualization in QuickSight. I also add permission ([https://docs.aws.amazon.com/iotanalytics/latest/userguide/pipeline-activities-lambda.html]) to my lambda function for IoT Analytics but when I want to use my lambda function in lambda pipeline activity there is no outgoing message. So my question is How to attach lambda function to IoT Analytics pipeline.

This is my function:

export const handler = async (event) => {
  // TODO implement
  var json = event;  // Pokud event je již objekt, není potřeba JSON.parse
  var stringMessage = event.data.rsp.rData;
  var splitMessage = stringMessage.split(".");
  var lengthString = splitMessage.length;
  //calculate
  var firstNumber = splitMessage[lengthString - 2];
  var secondNumber =  splitMessage[lengthString - 1];
  var hexNumber = secondNumber + firstNumber;
  var decimalNumber = parseFloat(hexNumber, 16);
  if (hexNumber[0] == "1") {
    hexNumber = hexNumber.slice(1);
    decimalNumber = parseFloat(hexNumber, 16) * (-1);
  }
  var temperature = decimalNumber * 0.0625;
  // Přidání hodnoty teploty k původnímu objektu JSON
  event.data.rsp.temperature = temperature;

  const response = {
    
    body: JSON.stringify(event),
  };
  return response;
};

And this is my JSON message: { "mType": "iqrfRaw", "data": { "msgId": "6e93f877-df24-4461-960d-fc172dbf2d9d", "rsp": { "rData": "03.00.20.80.0f.00.00.4e.62.01" }, "raw": [ { "request": "03.00.20.00.ff.ff", "requestTs": "2023-11-15T18:01:55.300+01:00", "confirmation": "03.00.20.00.ff.ff.ff.4f.03.08.03", "confirmationTs": "2023-11-15T18:01:55.318+01:00", "response": "03.00.20.80.0f.00.00.4e.62.01", "responseTs": "2023-11-15T18:01:56.095+01:00" } ], "insId": "iqrfgd2-default", "statusStr": "ok", "status": 0 } }