CoolTerm 1.1

Roger Meier
2.5 MB
Operating System
Mac Windows All
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(Win) CoolTerm 1.1 (Mac) CoolTerm 1.1

CoolTerm is an easy-to-use terminal for communication with hardware connected to serial ports.

CoolTerm is a simple serial port terminal application (no terminal emulation) that is geared towards hobbyists and professionals with a need to exchange data with hardware connected to serial ports such as servo controllers, robotic kits, GPS receivers, microcontrollers, etc.

The features of CoolTerm include:

  • Capability of multiple concurrent connections if multiple serial ports are available.
  • Display of received data in textual or hexadecimal format.
  • Sending data via keypresses as well as a "Send String" dialog that support data entry in textual or hexadecimal format.
  • Sending data via pasting of text into the terminal window.
  • Sending of text files.
  • Capability of recording received data to text files.
  • Local echoing of transmitted data.
  • Local echoing of received data (loop back to sender).
  • Hardware (CTS, DTR) and software flow control (XON).
  • Visual line status indicators.
  • Capability of manually toggling RTS and DTR signals when hardware flow control is disabled.
  • Capability of loading and saving connection options.

CoolTerm comes without an installer and can be placed anywhere on the harddrive as long as the correct folder structure is maintained. I.e. for the Windows version the "CoolTerm Libs" folder must reside in the same location as the "CoolTerm.exe" executable.


  • Added "Line Mode" to the communication settings. In "Line Mode" a line of typed text will not be sent to the serial port until the Enter key is pressed.
  • Added "History" which is available in "Line Mode" the up and down arrow keys can be used to select previously typed lines.
  • Added a receive buffer size limit option.
  • Added handling of the bell character (ASCII code 7), which can be enabled through the communication settings.
  • It is now possible to open the communication settings and edit certain options while the serial port is open.
  • The viewer mode (plain or hex) is now saved as parameter in connection settings files.
  • The size and position of terminal windows is now saved with connection settings.
  • Fixed bug that converted occurrences CR+CR+LF strings to single spaces on Windows.


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