How to resolce callback error : asyncio.Ch​annel/onDa​taReceived ....line(487):::

I am trying to get MATLAB to read a stream of incoming data via a serial port using callback ,

This is a peice of my code

s = serialport("COM4", 115200)

function readSerialData(src,evt)

src.UserData = data;

end

Whenever I type readline(S), I get a one time result but I want it to be automatic whenever a new stream of data arrive, hence my use of callback function.

So whenver I type

configureCallback ("COM4", "terminator" , @ readSerialData)

I get a non stopping error:

Error in asyncio.Channel/onDataReceived (line 487)
                notify(obj.InputStream, 'DataWritten', ...

Error in asyncio.Channel>@(source,data)obj.onDataReceived() (line 425)
                                         @(source, data) obj.onDataReceived()); 
> In asyncio/Channel/onDataReceived (line 487)
In asyncio.Channel>@(source,data)obj.onDataReceived() (line 425) 
>>

Answer 1

[LO]

I had the same problem. Check if you have two listeners (or also function callbacks) aiming at the same data stream.

For me that was the issue.