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Supported number types

It is noteworthy that the open62541 library does not support all number types included within Julia natively. Open62541.jl supports the same number types as its C counterpart. Julia types that are not supported will throw an exception, rather than silently performing an automated conversion for you.

If you want to store a Julia type that is not on the list below (for example: Float32, Complex{Int64} or Rational{Bool}) in an OPC UA server, you should consciously convert it to a supported number type beforehand.

Furthermore JUA_Client_readValueAttribute(client, nodeid) will return numbers in one of the supported formats below. You can specify the conversion to be used via its typed equivalent if you know a Float16 value should be returned, you can call JUA_Client_readValueAttribute(client, nodeid, Float16). This conversion obviously only works if implemented in Julia.

Adding other number types is possible, but relies on introducing a custom datatype. See the open62541 documentation for details about this.

Real numbers:

  • Boolean: Bool
  • Integers: Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64
  • Float: Float32, Float64
  • Rational: Rational{Int32}, Rational{UInt32}

Complex numbers:

  • Complex{Float32}
  • Complex{Float64}