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--- wiki:decoderupload [2023/07/28 17:58] – mbrauer
+++ wiki:decoderupload [2023/07/28 18:10] (current) – mbrauer
@@ Line 1: / Line 1: @@
 ====== Custom JavaScript Decoder Upload Requirements ======
-To ensure compatibility, follow these guidelines when uploading a custom JavaScript decoder. The decoder function should be denoted as `Decoder(bytes, port)`.
+To ensure compatibility, follow these guidelines when uploading a custom JavaScript decoder.
 ===== Example Custom Decoder Function =====
@@ Line 17: / Line 17: @@
   // Your decoding logic here
   let decodedResult = {}; //empty object that holds all UDT tag values
-  decodedResult.Measurement = bytes[1]
+  decodedResult.Measurement = bytes[0]
-  decodedResult.BatteryLevel = bytes[2]
+  decodedResult.BatteryLevel = bytes[1]
-  decodedResult.Temperature = bytes[3]
+  decodedResult.Temperature = bytes[2]
   return decodedResult;
 }
@@ Line 29: / Line 29: @@
       * Other functions can be used in the file can called from the Decoder function, but the Decoder function acts as the main function.
-      * bytes: This parameter represents the input data that needs to be decoded. It is an array of bytes that is gathered from an uplink's payload.
+      * **Return Value**: The decoder must return an **object** that represents the desired tag structure of the UDT.
-      * port: This parameter denotes the port number that might be used within the decoder function or during the decoding process.
+      * **bytes**: This parameter represents the input data that needs to be decoded. It is an array of bytes that is gathered from an uplink's payload.
+      * **port**: This parameter denotes the port number that might be used within the decoder function or during the decoding process.
 - **Runtime Limitations**: Be aware of the runtime limitations and constraints of GraalVM. For example, certain features or APIs available in other JavaScript engines may not be present in GraalVM. Refer to the GraalVM documentation for any restrictions you should consider while uploading your custom decoder.