User's Manual

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6) Ensure ‘Baudrate’ of the COM port is 115200 bps;
7) Click the start button ( ) on top toolbar of main window, Serial Port Utility will start
listening and printing the serial communication between the PC and the tracker device.
Figure 4-10 ‘Start’ button on top toolbar
8) Click the input region and enter command string here, extra ‘RETURN’ key-in must
require at the end of command line (or not the command will be ignored when received
by the tracker device). Input command and send it to the tracker device (TL904D),
most of commands will be back instantly; (Shown as Figure 4-11)
Figure 4-11 Input command and send out on Shell
Note
Each input command must be end with hard ‘RETURN’ key-in.