Script to parse byte array

[adamalfath]

The client is publishing data in byte array 0x01 0x02 0x03 0x04 and MQTTX using Hex format can read it as 0102 0304

However in the script, payload treated as string "0102 0304 " so accessing value[0]="0", value[1]="1" (returning char) which is not what I intended. And also the script is dynamically adjusted the "value" based on the format specified in the main window (ex: plaintext, json, etc).

How to make script function independent to that changes and read the original payload value?