Exchange data with remote computers using the standard streaming operators '<'< and '>'>.
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If you are unable to find a free Modbus Slave simulator, here is one.
Serial data transmission seems a bit difficult for those who are new to the world of serial communication and VC++. Check out this simple class for implementing serial transmission using WINAPI functions.
Discover how to do serial communication from within your own applications from this detailed article.
A communication class for serial port
CSerial - A C++ Class for Serial Communications
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