SENA Parani-ESD100-110-200-210 - Manual (Page 30)

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A.1.2. Parani-ESD200/210
Figure A-2 Pin Assignment of Parani-ESD200/210
Table A-2 Pin Assignment of Parani-ESD200/210
Pin # Signal Direction Description Signal Level
1 GND - Power Ground Ground
2 VDD Input DC Input (3.0~3.3V) Power
3 DCD Output Bluetooth Connect Detect (Active Low) TTL
4 RST Input Reset (Active Low) TTL
5 CTS Input UART Clear to Send TTL
6 RTS Output UART Ready to Send TTL
7 TxD Output UART Data Output TTL
8 RxD Input UART Data Input TTL
A.1.3. DCD Signal (Status: Bluetooth Connect Detect)
Status of Bluetooth connection will be delivered to Host PC via DCD line. Connection Module 
low signal
A.1.4. RST Signal
RST signal will be used for setting the Parani-ESD to factory defaults. RST should be on 0V status
for at least 1 second for the reset to occur.