ID卡读卡器源程序 用Mega32通过U2270B读取H4001RFID卡号的范例-ID card reader with Mega32 source U2270B read H4001RFID card number through an example of

射频门禁系统，包括一个主机和两个读头，并带LCD显示-RF access control system, including a master and two read heads, and with LCD display