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    [desc_short] => RFID读写 RDM600射频5khz读卡器UART串口输出
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直接串口输出操作：
1.RDM6300读卡模块接线如下：5v供电
2.开发板烧写空程序即可：
void setup(){}
 
void loop(){}
3.串口助手或者 IDE串口读卡输出数据：
输出格式为16进制的起始帧+ID码+校验码+停止帧，例如ID Tag上的数字为 0008565187 ，输出为下图
 
16进制之间的换算
 
RDM630系列非接触式射频ID卡专用模块，釆用先进的射频接收线路及嵌入式微控制器设计，结合高效译码算法，完成对EM4100兼容式ID卡的数据接收。具有接收灵敏度高﹑工作电流小﹑稳定性高等特点,适用于门禁﹑考勤﹑收费﹑防盗﹑巡更等各种射频识别应用领域。
读卡距离最大5CM。线圈电感47~68uH
 
国外用户常用的RFID读卡配套模块，可以读125K EM4100 系列RFID卡。该模块使用方便，供电后串口连接主板，当有RFID卡进入读卡范围，模块会通过UART直接把卡号发送给。再用继电器模块连接就可以实现简单的门禁控制。



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