The serial port cannot be connected
1) The baud rate of the reader is 115200bps, and the value of the XC_BaudRate item in the sysit.cfg file under the installation path is 115200;
2) Is the selected COM port consistent with the connection between the reader and the PC;
3)Whether the serial port cable is connected correctly. If the cable is not connected or the connection is not reliable, the PC commands cannot be sent to the reader/writer 5 and the card cannot be read;
4) Whether the serial port cable or network cable is connected correctly. If the cable is not connected or the connection is not reliable, the PC commands cannot be sent to the reader/writer;
5)Please check whether the antenna SMA connector is tightened and whether the label is damaged, otherwise the MCU of the reader is faulty and the user can only contact Yuanwanggu Company to discuss repair matters;