Instructions

Contactless Card Read/Write Module（QM-201C-HF）User’s
Manual
c)BlockHeaderSTX=0x02,BlockEndETX=0x03.Fromheadertoend,but
notincludetheheaderSTXandtheendETX,ifthereis0x02,0x03
or 0x10 , then must add 0x10 before it.
d)Block Header STX=0x02.
e)PackageLength:thebytefromLengthitselftoChecksum,butnot
include the added byte 0x10 due to 0x02,0x03 or 0x10.
f)Command: Refer to the Command List.
g)The Content of n bytes: the parameter.
h)CheckSum:XORresultfrom[Length]tothenlastbyteof[Content],
but not include the added byte 0x10 due to 0x02,0x03 or 0x10.
i)Block End ETX=0x02.
Example:
CMD: 0x10，DATA:0x00
Block Header:0x02。
LEN:0x04(=1Byte(Len) +1Byte(CMD)+1Byte(DATA)+1Byte(CHK))
CMD:0x10,0x10. (Add 0x01 before 0x10)
DATA:0x00。
CHECKSUM:0x14(=0x04^0x10^0x00)
Package Send:0x02,0x04,0x10,0x10,0x00,0x14,0x03.
2) Respond Format（
Q
M-201C-
HF
module → MCU
）
[STX] [LEN] [CMD] [STATUS] [DATA] [CHK] [ETX]
Content
0x00：
Command Success
0xFF：Fail
The
Package
0x02
1
Content of CheckSum
n bytes
0x03
1
Length
Num of
Byte
1 1 1 n 1
Table 3
a)Asynchronism half duplex, 1 Start bit + 7 Data bits + 1 Stop bit.
b)The default transfer speed is 19200 bit/s.
Contactless Card, RFID…
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