Serial Ports in Java

The steps to perform, in order to make COM ports visible by a servlet in Tomcat, are:

  • copy file comm.jar to JAVA_HOME\jre\lib\ext
  • copy file javax.comm.properties to JAVA_HOME\jre\lib
  • copy file win32com.dll to JAVA_HOME\lib

If there are errors in Tomcat regarding javax.comm.properties,

  • copy file javax.comm.properties to CATALINA_HOME\bin
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