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MIKE MEYERS COMPTIA RFID+ CERTIFICATION PASSPORT
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e ve discussed what to check and how to determine causes of problems with a device as well as what to do if performance is worse than expected These problems are usually caused by improper configuration Now let s look at hardware and software issues that may cause less than ideal performance of the device
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Known software issues within the hardware can often be addressed through firmware upgrades from the manufacturer However, these updates should be applied only if they address a specific need Every firmware update for RFID interrogators, RFID printers, or any other device will include a text file that describes the issues it specifically addresses Manufacturers use these upgrades to fix problems identified in units after they have been released Firmware updates can also be used to increase the functionality of components For instance, many readers and printers could be firmware upgraded to support Gen 2 tags In case the firmware introduces a new feature or support for a new technology standard that you will be using, an upgrade will save you money and time you would spend obtaining new devices It is always a good idea and best practice to make sure that all similar devices are running on the same version of firmware This can help ensure consistency, both in performance and in maintenance Different versions of firmware may cause discrepancies in how various readers perform, even if they are the same model As new firmware is released, it may cause the reader to run faster due to enhancements, for example To obtain uniform performance, test a firmware on a sample reader to see that it works as expected, and then deploy it to all readers of that type When building a maintenance plan for your equipment, you should always have a documented procedure to load the specific firmware your company uses on the device before deploying or replacing it This way, all of the options in your configuration are sure to be available, and all the features you need are where your technicians expect them based on the documentation
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CHAPTER 8 Testing and Troubleshooting
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Be careful not to load a version of firmware simply because it is the latest available The rule here is very old and very simple Or, If it isn t broken, don t fix it! If you decide to try out new firmware, always test it on an isolated device designated for testing to ensure that it is not going to cause problems Subtle changes in an upgrade can wreak havoc on an implementation if the upgrade is not implemented properly For instance, command sets could change between versions, rendering installed communications useless and requiring extensive re-engineering of software components For these reasons, always test new versions thoroughly in every use scenario in the company (dock door configurations, conveyor configurations, and so on) before considering full-scale rollout
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Network communication problems can dramatically impact the performance of an installed RFID system If you recorded a baseline of performance during installation, you ll find it beneficial to check to baseline to determine the average response time then Comparing the original response time to the current situation may indicate the network is experiencing higher network traffic, causing a slow response from the RFID installation
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Software
When all of the physical devices and the network have been verified and are working, proceed to checking the software Most middleware platforms include some sort of status monitor that can be used to verify at a glance that the program is functional Sometimes a test script is included to allow you to input a known data stream and expect a fixed value to be output If the script produces the expected value, the problem may be somewhere else You should investigate the connection from the middleware to the legacy application All software can be restarted (like step one with hardware) by rebooting it When a service appears to be locked up or not responding to regular input, restarting it is the first step If this does not resolve the issue, check the error logs for a logged failure Even a recent administrator password change can cause issues for services and will appear as such in the error logs Certain errors can be also cleared by restoring the reader s default settings Some readers have a safe mode that does not allow reading tags or other regular operations but restores default settings and tests various reader functions
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