Serial Port Utility comes with very basic functionality but it is well designed and easy to use. Its intuitive and friendly user interface seems very light, but its power can be accessed in an instant.
Key features
Discover connected devices on the selected port
Use a drop-down list to select the serial port that you wish to use for the connection
Automatically turns any attached device into a real-time source for received data
Send commands and receive data in a hexadecimal or ASCII 66cf4387b