Installing comport API in windows OS
comm.jar should be placed in: %JAVA_HOME%/lib %JAVA_HOME%/jre/lib/ext win32com.dll should be placed in: %JAVA_HOME%/bin %JAVA_HOME%/jre/bin %windir%System32 javax.comm.properties should be placed in: %JAVA_HOME%/lib %JAVA_HOME%/jre/lib practice programs: serialport communication using Java http://javamix.wordpress.com/2009/01/21/sending-sms-using-serialport-communication-api/