Rainbow Electronics GM862-GPS - Manual (Page 73)

Easy Script in Python
80000ST10020a Rev.8 - 01/10/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 73 of 100
3.3.1.2 Debugging process
After the successful installation of the drivers process of direct debugging of the Telit GPS modules
can start. The steps are the following:
• Switch on the module and activate the SSC output with the following AT command:
AT#SSCTRACE=1
• Download and enable your Python script, then power OFF the module.
• to be sure that DTR input to the module is HIGH disconnect the RS232 cable from the
module side (i.e. RS232 DTR on the modem serial port is LOW);
• check if you have the USB cable connected between the USB port of the PC and the USB
port placed on the EVK2
• every time before you power ON the module you have to click on the Reset button in the
Python Debug application (necessary to reactivate the association between the virtual Com
port and the SSC device)
• Run a terminal emulator application (e.g. Hyper Terminal) to trace the activity of the Python
script, with the following setting:
connected
COM
virtual Port set in Python
Debug (COM8 in the
example)
Bit rate
115 200
Data bits 8
Parity
No parity
Stop bit
1
Flow control Hardware
• Power ON the module and you should see the script starting and the debug info appearing
on the terminal emulator window.
• If the debug strings do not appear on the screen: power OFF the module, check again if
USB cable is correctly connected, reset the Python Debug application, than power ON the
module and run the terminal emulator application with the same settings as before.