I am currently using a UHF RFID module labeled UM202, which is designed for integration with an external antenna. The module has distinct pins, including 5V, ground (GND), 232TXD, 232RXD, RS485 interface, and RS232 for serial communication. I intend to create a database using Arduino. Could you guide me on which pins to connect, and what library should I use for my code?
IS there some documentation for the device that explains what these connections actually do?
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