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8H10D ASCII：Output 10 bytes DEC UID of M1 Card,Such as MF S50 F08 S70

14Byte 16HEX: Output 14 bytes 16HEX UID of NFC card( iso1443A,not support iso15693 iso1443b)

R21 series it's RFID smart card reader with a standard serial port, reader distance up to 80mm, it's not only simple aspect, but also stable and reliable data. Widely used for RFID Radio Frequency Identification system and project, Such as Automated parking management system, Personal identification, Access controller, Production Access control, etc
Ⅱ Instructions for use
Method of installation and use

1. Connect with computer through a serial cable directly. When the buzzer sounded, reader into the self-inspection. And the same time, LED turn into red means standby.
2. Open the output of computer software,such as Serial debugging assistant.
3. Put tag on the top of reader, the software will output a data(card number) of the tag. When reading the tag, LED light change from red to green.

Detecting device is connected

Open the Device Manager of computer, If appears Device and “COM” port is OK that means Reader has successfully into computer.

Ⅲ Communication Format
RS232 Communication
9600 bps, none parity, 8 data bits, 1 stop bit
Data Format

STX

Length

CardType

SNR [0..N]

BCC

ETX

The following table describes the packet fields

Field	Length	Description
STX	1	0x02, the starting of a data packet.
Length	1	Length of the data bytes in the packet (except STX).
CardType	1	0x01: MF Classic; 0x02: EM4100
SNR [0..N]	5	SNR[0]:batch number, SNR[1..4]:serial numbers
BCC	1	BCC = Length xor CardType xor SNR[0..N]
STX	1	0x03, the ending of a data packet.

Example:  02 0A 02 06 00 8E 6D 5D B0 03 
STX: 02
Length: 0A, 9 bytes
CardType: 02, EM
SNR: 06 00 8E 6D 5D, 06 = batch number, 00 8E 6D 5D = 0009334109 (DEC)
BCC: B0,  B0 = 0A xor 02 xor 06 xor 00 xor 8E xor 6D xor 5D
EXT: 03