Ø If No response when read the card: whether the interface is plugged in whether the RF card is the corresponding RFID card class whether the RF card is broken whether there is another RF card in the card reading range. Ø The length of the communication cable between the card reader and the computer should be less than 15 meters. Ø When you read your card, it is recommended not to operate the mouse to avoid sending data errors. It is not guaranteed that the card will be swiped successfully. It is not advisable to read the card quickly across the side of the card. Ø It is suggested that the card should be read in the direction of the card reader. At the same time, the two card readers that are too close will interfere with each other. Ø If the reading distance of the card reader is too long, it will cause instability or failure of the card reader, and avoid reading the card in the critical state (the distance between just reading the card). Different antenna designs, surroundings (mainly metal objects) and different cards will affect the actual distance of reading cards because of different protocols. Ø There are many factors that affect the distance of reading cards. Ø If the data connection is directly inserted into the charging plug, it will cause unsuccessful reading. Matters needing attention and Simple troubleshooting The card reader enters the card swipe state, opens the "Device Manager" of the computer, checks whether the anthropological input device appears in the menu of options, and if so, indicates that the device has successfully connected to the computer. Method for detecting card reader connecting to computer Note: Test card reader reading label method: Open the computer output software (such as Notepad WORD EXCEL and other editors), the card close to the reader, at this time the output software cursor display label card number. When the card indicator is red, the card reader enters the waiting card state. One end of the data line is connected to the corresponding interface of the computer, the other end is connected to the communication port of the card reader, and the card reader enters the self-test and initialization with the sound of "dropping". In the process of use, you can dial and plug (plug and play), without external power supply, the user does not need to load any driver, output to the computer through the data interface, equivalent to automatic keyboard input. R20D a 125Khz free drive read only ID tag physical number card reader.
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