BLE RS-232 Reader user manual V2.1
2019.06.20
2
2.2 DB9 connector: (Male)
Pin
Signal
DTE Direction
DCE Direction
Description
1
N/A
2
RxD
Output
Input
Transmitted data
3
TxD
Input
Output
Received data
4
N/A
5
GND
Ground
6
N/A
7
RTS
8
CTS
9
Vin
Power Input (5 VDC)
2.3 Rear Side:
2.4 Default:
All pin is “0”, Baud rate 9,600 bps., 8 Data bits, None parity, 1 Stop bit.
DIP Switch
▲
DCE
▼
DTE
2: RX 3: TX
5: GND 9: Vin
DCE/DTE:
Swap TX & RX
