This is their own example of serial communication, after verification, and is byte transmission, a good example.

serialport
serialport\serialport
serialport\serialport\10011.ico
serialport\serialport\14.ico
serialport\serialport\App.config
serialport\serialport\Form1.Designer.vb
serialport\serialport\Form1.resx
serialport\serialport\Form1.vb
serialport\serialport\My Project
serialport\serialport\My Project\Application.Designer.vb
serialport\serialport\My Project\Application.myapp
serialport\serialport\My Project\AssemblyInfo.vb
serialport\serialport\My Project\Resources.Designer.vb
serialport\serialport\My Project\Resources.resx
serialport\serialport\My Project\Settings.Designer.vb
serialport\serialport\My Project\Settings.settings
serialport\serialport\My Project\app.manifest
serialport\serialport\Resources
serialport\serialport\Resources\88fc5266d0160924cc3cae7dd50735fae6cd34bf.jpg
serialport\serialport\bin
serialport\serialport\bin\Debug
serialport\serialport\bin\Debug\AxInterop.MSCommLib.dll
serialport\serialport\bin\Debug\Interop.MSCommLib.dll
serialport\serialport\bin\Debug\Z_Chat.exe
serialport\serialport\bin\Debug\Z_Chat.exe.config
serialport\serialport\bin\Debug\Z_Chat.pdb
serialport\serialport\bin\Debug\Z_Chat.vshost.exe
serialport\serialport\bin\Debug\Z_Chat.vshost.exe.config
serialport\serialport\bin\Debug\Z_Chat.vshost.exe.manifest
serialport\serialport\bin\Debug\Z_Chat.xml
serialport\serialport\bin\Debug\Zigbee_Chat.vshost.exe.config
serialport\serialport\bin\Debug\serialport.vshost.exe.config
serialport\serialport\bin\Debug\serialport.vshost.exe.manifest
serialport\serialport\obj
serialport\serialport\obj\Debug
serialport\serialport\obj\Debug\AxInterop.MSCommLib.dll
serialport\serialport\obj\Debug\DesignTimeResolveAssemblyReferences.cache
serialport\serialport\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache
serialport\serialport\obj\Debug\Interop.MSCommLib.dll
serialport\serialport\obj\Debug\TempPE
serialport\serialport\obj\Debug\TempPE\My Project.Resources.Designer.vb.dll
serialport\serialport\obj\Debug\Z_Chat.Form1.resources
serialport\serialport\obj\Debug\Z_Chat.Resources.resources
serialport\serialport\obj\Debug\Z_Chat.exe
serialport\serialport\obj\Debug\Z_Chat.pdb
serialport\serialport\obj\Debug\Z_Chat.xml
serialport\serialport\obj\Debug\serialport.vbproj.FileListAbsolute.txt
serialport\serialport\obj\Debug\serialport.vbproj.GenerateResource.Cache
serialport\serialport\obj\Debug\serialport.vbproj.ResolveComReference.cache
serialport\serialport\obj\Debug\serialport.vbprojResolveAssemblyReference.cache
serialport\serialport\serialport.vbproj
serialport\serialport.sln
serialport\serialport.v12.suo

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