User's Manual

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4.4 Turn on the tracker device

Open the rubber plug at the side, press and hold power button for about 4 seconds

until the power indicator (RED led on front panel) lights up.

4.5 Open serial command shell

Serial Port Utility is a tool help read information and write command between PC and

tracker device (TL904D). This chapter will help setup the command shell environment step

by step.

1) Connect the USB serial cable between PC and the tracker device (TL904D);

2) Download ‘Serial Port Utility.zip’ and extract it into a local folder, then double click

SerialPortUtility.exe to start the program. (Shown as Figure 4-6)

Figure 4-6 Files list of Serial Port Utility

3) If SerialPortUtility.exe is running for the first time on a PC, a register window will pop

up, just ignore it by click ‘Register Later’ button; (Show as Figure 4-7)