For reader RS232 wire connection, please refer to below information:
Below is the pin-out of a typical standard male 9-pin RS232 connector, this connector type is also referred to
as a DB9 connector.
A computer's serial COM port (DTE) is usually a male port as shown below, and any peripheral devices you
connect to this port usually has a female connector (DCE).
Pin
Signal Name
Dir
Description
Connect to reader
1
DCD
In
Data Carrier Detect
2
RXD
In
Receive Data
14 - Black/white
3
TXD
Out
Transmit Data
13 - Brown/white
4
DTR
Out
Data Terminal Ready
5
0V/COM
一
0V or System Ground
1 - Black
6
DSR
In
Data Set Ready
7
RTS
Out
Request to Send
8
CTS
In
Clear to Send
9
RI
In
Ring Indicator