ReadAsync and Read with Error Timeout

[Chirico Costal]

Hi,

I was trying the library by interfacing it with a WPF c # GUI specifically I was trying to implement the reconnection that every n milliseconds with a timer goes to Read n tags as many as I decided to monitor, but everything works when I use the function tag.Read and it returns me a first error of type ErrorRead and the following ErrorTimeout until I reestablish the connection (I tested up to 1 hour of disconnection) and waiting a maximum of 25 seconds from it I get the updated values, while if I do everything with the function tag.ReadAsync I get a first error that varies between ErrorWrite, ErrorRead and ErrorBusy and that's it, it no longer triggers the timer and consequently when I re-establish the connection I don't see the updated value, there could be an error in the ReadAsync or am I wrong in the implementation?

I leave below some screenshots of the code.

[tim...@gmail.com]

Hey there, this looks like you're using libplctag.NET, which version of the package are you using?

There are some issues around the async methods in v1.0.3 that are resolved in v1.0.4-beta.1

[Chirico Costal]

Really thanks for the reply, it works perfectly now!!! When will it be released in a stable version?

[tim...@gmail.com]

That's great to hear! Actually I'm just waiting for it to be tested well. I've done some testing on my end, but it needs more eyes.

Could you please let me know which methods, properties you are using on the Tag objects:

https://github.com/libplctag/libplctag.NET/blob/master/src/libplctag/Tag.cs

https://github.com/libplctag/libplctag.NET/blob/master/src/libplctag/TagOfT.cs

[Chirico Costal]

At the moment we are testing this method of TagOfT: Read, ReadAsync operations, Initialize, Dispose and GetStatus with all DataType but we realized that 4 DataType are missing such us, SByte, UInt, ULong, UShort and for there we were created a new Classes from the Base one (DataType : PlcMapperBase<datatype>)

[tim...@gmail.com]

That is great to hear!

If you do get a chance to test the Write methods that would be great

[Chirico Costal]

OK, next week i will working on Write methods, Can ask you a question about the Licence of libplctag.Net expecificaly on the Distribution clause? 

[timyhac]

İt is MPL 2.0

https://github.com/libplctag/libplctag.NET/blob/master/LICENSE

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[Chirico Costal]

Yes, I'll explain briefly.
We want to use the library in private software for commercial use. We want to sell this software in two ways:

The first would be to sell the software encapsulated in a PC set up and configured with our other proprietary software where the customer would not have direct access to the use the software it is used only internally;

The second it would be to sell in the form of .exe, for example a Client type software in which the library is implemented and he will be able to connect, read and write with the plc.

In both cases what will I have to share?

Because in the first case mentioned above, the customer will not have access to the PC so if I put the License file and a reference link to the code he will never be able to look at it, instead in the second case, I will put the License and the reference link to the code in the root folder , is this enough or do I have to add something else?

[timyhac]

I'm not a lawyer so I can't provide legally useful advice.

Clause 3.2 of MPL talks about informing the recipient of certain things when you distribute an executable (which is what you're doing), but not how you need to do it.

Something I've seen is apps having a Third-Party licenses page, which lists all of the libraries it uses and can be used to fulfil whatever disclosure requirements they have.

Or maybe it's just part of some other communication (license agreement/contract) you have with them.

I'm an engineer, not a lawyer, so you should get advice from elsewhere.

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