描如下配置参数，设置波特率 115200、232 通信模式。然后扫描完成后，重新上下电二维
码读卡器才能生效配置。
Step 1: The QR code reader can change the corresponding parameters by scanning the
parameters QR code, so you need to scan the following configuration parameters, and set
the baud rate to 115200 and 232 communication mode. Then after scanning is completed,
power on and off the QR code reader again.
第二步：将 K3M200 权限板添加到 IVMS-4200 平台，并且查看权限板的串口 7 和 8 参数配
置是否正确，如下三张图所示。
Step 2: Add the K3M200 authorization board to the IVMS-4200 platform, and check whether
the serial port 7 and 8 parameters of the access control board are configured correctly, as
shown in the following three pictures.
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