Siemens XT65 - Manual (Page 117)

Java User’s Guide
13.1 Using the AT Command API
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13.1.1.4 Synchronization
For performance reasons no synchronization is done in the ATCommand class. If an instance
of this class has to be accessed from different threads ensure that the send() functions, the
release() function, the cancelCommand() function and the breakConnection() function are syn-
chronized in the user implementation.
13.1.2 ATCommandResponseListener Interface
The ATCommandResponseListener interface defines the capabilities for receiving the
response to an AT command sent to one of the module's AT parsers. When the user wants to
use the non blocking version of the ATCommand.send function of an implementation class of
the ATCommandResponseListener interface must be created first. The single method of this
class, ATResponse(), must contain the processing code for the possible response to the AT
command sent.
13.1.2.1 Non-Blocking ATCommand.send() Method
After creating an instance of the ATCommandResponseListener class, the class instance can
be passed as the second parameter of the non-blocking ATCommand.send() method. After the
AT command has been passed to the AT parser, the function returns immediately and the
response to the AT command is passed to this callback class later when it becomes available
Somewhere in the application:
A running AT command sent with the non-blocking send function can be cancelled with
ATCommand.cancelCommand(). Any possible responses to the cancellation are sent to the
waiting callback instance.
Note: Using the send methods with incorrect AT command syntax in the strings will cause
errors.
class MyListener implements ATCommandResponseListener {
String listen_for;
public MyListener(String awaited_response) {
listen_for = awaited_response;
}
void ATResponse(String Response) {
if (Response.indexOf(listen_for) >= 0) {
System.out.println("received: " + strRcv);
}
}
}
MyListener connect_list = new MyListener("CONNECT");
atc.send("ATD" + CALLED_NO + "\r", connect_list);
/* Application continues while the AT command is processed*/
/* When the module delivers its response to the AT command the callback
* method ATResponse is called. If the response is "CONNECT", we will see
* the printed message from ATResponse in MyListener. */