Handheld ConfigReceiver
· Serialport helper for Nautiz X2 and Nautiz X6. See https://www.handheldgroup.com/knowledge-base/accessing-the-serial-port-on-the-back-connector/ for details
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window serialport-1.5.3.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.