Vovsoft Serial Port Monitor is a simple to use utility that allows monitoring your computer's COM port data traffic. You can read data from any COM port and send data to any COM port. Using this simple port sniffer program, you can monitor and control any hardware compliant with RS-232 protocol, RS-485 protocol, RS-422 protocol or any other compatible serial port device. The RS-232 (DB9) pinout specifies that only the RX (receiver) and TX (transmitter) pins are necessary for communication. The rest of the pins are necessary only if you implement some form of hardware flow control. You can easily read incoming data from RX and send outgoing data to TX with the help of Vovsoft Serial Port Monitor.