The research and application of IOT (Internet of things) are popular day by day, which include hardware of electronic label reader, IOT software and e-business, etc.
物联网的研究和应用日趋广泛，包含有电子标签识读器硬件、物联网软件、电子商务相关研究等众多方面。
When the distance between the RFID card reader and the RFID label is beyond the preset range, the main controller enables the electronic equipment to work in an emergency mode.
当RFID读卡器与RFID标签的距离超出该预定范围时，主控制器使电子设备工作于紧急模式。
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