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11:20, EEST
June 21, 2016
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Hello,
I want to read a value which is a struct on the real time side. If I read the datatype from within an android application it is represented as bytestring. How do I handle reading and writing the individual components of the bytestring in java?
Thanks a lot.
BR,
Carsten Voort
12:39, EEST
April 3, 2012
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If the DataType Attribute is a ByteString then from OPC UA’s perspective it is just a series of bytes. It is a scalar type that consists of an array of bytes that can only be Read/Write completely not in parts (similarly as a String is in programming languages a series of characters). An OPC UA ByteString will map to byte[] in Java. Therefore it can be accessed like any other java array e.g. first element
byte[] bs = (byte[]) dv.getValue().getValue(); //assuming it is a ByteString
byte element0 = bs[0];
Please let me know if my interpretation of your question was wrong.
– Bjarne
14:34, EEST
June 21, 2016
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Hello Bjarne,
Thank you for responding. The cast indeed does the job. How about writing to this same NodeId with a bytestring?
BR,
Carsten Voort
15:18, EEST
June 21, 2016
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hcvoort said
Hello Bjarne,Thank you for responding. The cast indeed does the job. How about writing to this same NodeId with a bytestring?
BR,
Carsten Voort Â
Hi Bjarne,
I already figured it out 🙂
-Carsten
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