Smart Machine Smart Decision
SIM521x EVB User Guide
11.04.2011
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6.3 Connecting Net and calling
Once user installs the driver, user can follow steps below to connect to Network.
(1) When user use a UART-UART cable, user need to connect the serial port line to the serial port,
open the HyperTerminal (AT command windows) on user’s Personal computer. The location of
the HyperTerminal in windows2000/XP/Vista can be found from START
→
accessory
→
communication
→
HyperTerminal. Please set the correct Baud Rate and COM port number, the
Baud Rate of SIM521x is 115200, and the COM port number is based on which UART port user’s
serial port line is inserted, user should select the port such as COM1 or COM2 etc.
(2) Connect the antenna to the SIM521x module using an antenna transmit line, insert SIM card
into the SIM card holder, and insert handset into its sockets.
(3) Follow the steps of running which has been mentioned above in Sector 5.1, power on the
system, type the AT command from the HyperTerminal, and then the SIM521x module will
execute its corresponding function. For example, if user type “AT”, then it should respond “OK”;
if user type “ATI”, it should display product identification information.
(4) If user want to use USB to USB cable, user need to connect the cable to USB port of the
module and the computer, then follow step 1~3.
(5) If user use UART to USB cable, user need to connect the cable to module serial port and the
USB port of the computer, then follow step 1~3.
6.4 Downloading
Connect the USB port line to the USB port, connect the direct current source adapter, run the
download program, and choose the correct image, please follow the QDL downloading menu for
the operation. Update procedure is described in the figure below.
