SPTerm will scan the computer for available com port in the PC. Setting for Stop bit, baud rate, parity and Bits can be selected before opening the connection to the port. When the serial port is open any data that is received will be displayed in the ASCII box while the Hex will be display in the Hex box. The check box Clear to send and Data Set ready shows the status of the 2 pins. Check indicate high on the pin while unchecked means that its low. Data can be send out through the text box at send group either using the ASCII or hex format. Checking request to send and data terminal ready would output high to each of the pins individually.