Simulink: uint8 vector to individual uint8s

Hello,

I need to send 6 bytes via the Arduino TCP/IP Send block (be careful: the ethernet one, not the wifi one, which accepts uint8 vectors): The problem is that it only allows uint8.

However, I have a vector of 6 uint8 values, let's say [1,2,3,4,5,6] returned by my custom MATLAB function:

Now as you see, I have become rather desperate to bring my uint8s into a form suitable to send. Is there a way to use that Unbuffer properly? Or is it possible to somehow loop through the uints8 and pass them on to the block? Any other workaround?

Any help is appreciated - thanks a lot!

Best, Andreas

Answer 1

[David Ding]

Hi Andreas,

I see that you are trying to serialize the vector of uint8s coming from a MATLAB Function block. In this case, instead of using the "unbuffer" block, consider using a "Byte Unpack" block from the "Utilities" folder of the Simulink Support Package for Arduino Hardware, found in the Simulink Library Browser. I have attached the image for your reference.

For more information about the "Byte Unpack" block in the Arduino Support Package, please refer below:

https://www.mathworks.com/help/releases/R2017b/supportpkg/arduino/ref/byteunpack.html

Sincerely,

David

[Andreas Nagl]

Thanks. So, for example in order to get 1 uint8, 1 uint16 and again 1 uint8, I would simply set:

Output port dimensions: {[1], [2], [1]}

Outport datatypes: {'uint8', 'uint16', 'uint8'}

Did I understand that correctly? Seems easy enough...

[David Ding]

Hi Andreas,

That is exactly correct! The "Byte Unpack" block of the support package is especially designed to serialize data to communicate to the Arduino Hardware.

Thanks,

David

[Andreas Nagl]

Thank you, that was very helpful!