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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(89.60000000000001, 11%, 18%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESD%3C/text%3E%3C/svg%3E)
Has anyone had any luck creating a c# Net Standard 2.1 RS232 serial coms library using the System.IO.Ports package for use with a WebAssembly project. It would seem there's an issue with the Nuget package containing the wrong version of System.IO.Ports (based on some posts I've read) so what I did was to add a reference to the correct System.IO.Ports.dll library and added in the other packages separately E.g System.Memory & System.Buffers etc. However I'm having an issue when I call SerialPort.Open(). In that the browser throws this exception.
blazor.webassembly.js:1 crit: Microsoft.AspNetCore.Components.WebAssembly.Rendering.WebAssemblyRenderer[100]
Unhandled exception rendering component: kernel32.dll assembly:<unknown assembly> type:<unknown type> member:(null)
System.DllNotFoundException: kernel32.dll assembly:<unknown assembly> type:<unknown type> member:(null)...
Can anyone shed any light on this? am I using the correct library or is there something better?
Thanks in advance
Darren
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Hi @Swindells, Darren (DI IT MC MF-CON) ,
Can you post the related steps to reproduce the problem? Based on your description, I tried to create an Asp.net core Blazor WebAssembly project and install the System.IO.Ports package, but can't reproduce the problem. Besides, I also found a thread about Read from Serial Port on Blazor, you could check it.
That's a Blazor server app, from what I now understand it isn't possible to talk to the client PC's com port because the web assembly app effectively runs in a mono sandbox. I've now amended my approach by creating a web api service and calling into that.