How to create a serial com port connection • To set up a serial terminal connection in HyperTerminal, First enter a name for your connection, click OK. • Select your COM port under “connect using”. • Click Configure and change the port settings to match the settings required by the device you are connecting to.
Click OK • Click OK again, and the program will attempt to connect. Troubleshooting • Unable to open COM port COM1 COM2 COM3 The unable to open serial port message usually occurs when the com port is in use by another program. Find out which program is using the port and disconnect it. Alternatively you can use a different COM port if you have one available. Less often this issue can be caused by a permissions issue. In this case try running the program as an administrator.