Installation guide

Rev 1.1 9/22/14 33
Getting Started
Communicating with the
USR3500
6.6. Checking the PIN Code Status
Using a communication software such as HyperTerminal, enter AT+CPIN? to check the
PIN code status. Refer to the table below for the list of main responses returned.
Table 16. AT+CPIN Main Responses
AT+CPIN Response
Description
+CPIN: READY
The PIN code has been entered.
+CPIN: SIM PIN
The PIN code has not been entered.
6.7. Echo Function
If no echo is displayed when entering an AT Command, it could mean either of the
following:
The “local echo” parameter of your communication software (HyperTerminal) is
disabled.
The USR3500 echo function is disabled.
To enable the USR3500’s echo function, enter the AT Command ATE1.
When sending AT Commands to the USR3500 using a communication software such
as HyperTerminal, it is recommended to:
Disable the “local echo” parameter of your communication software.
Enable the USR3500’s echo function (use the ATE1 command).
In a machine-to-machine communication with the USR3500, it is recommended to
disable the USR3500’s echo function (using the ATE0 AT command) in order to avoid
useless embedded module processing.
6.8. Enabling/Disabling the Flash LED
The USR3500 has a red LED indicator that shows the status of the GSM network. It is
possible to disable this LED during Sleep mode in order to reduce power consumption.
Using a communication software such as HyperTerminal, enter:
AT+WHCNF=1,0 to deactivate Flash LED
AT+WHCNF=1,1 to activate Flash LED
Note: You will need to restart the USR3500 for the new setting to take effect.