User's Manual

21
A.1.1. DCD Signal
Status of Bluetooth connection will be delivered to Host PC via DCD line. When Bluetooth
connection is made, DCD signal will be in state OFF. For disconnection of Bluetooth, DCD signal
will become state ON.
Connection Module  low signal
A.1.2. RST Signal
RST signal will be used for initialization of Parani-ESD. RST should be on 0V status for at least 1
second for this.
A.1.3. Pairing Signal
Parani-ESD1XXV2 provides pairing signal input for instant configuration without PC to make an
automatic connection between two Parani-ESDs. For convenience sake, name two Parani-ESDs
as ESD1 and ESD2 respectively.
Step 1. Turn off all the nearby Parani-ESD
Step 2. Turn on ESD1 and ESD2 and hardware reset both of them by using RST signal.
Step 3. Drop the pairing signal of ESD1 to low state and keep it for 2 seconds. Keep the power ON.
Step 4. Drop the pairing signal of ESD2 to low state and keep it for 2 seconds. Raise the pairing
signal of ESD2 to high state and keep it for 2 seconds. Now drop again the pairing signal of
ESD2 to low state and keep it for 2 seconds
Step 5. Wait for ESD1 & ESD2 to be connected for a while. It takes about 10 seconds to make a
connection. If there are many Bluetooth devices nearby, it will take a little bit more.
Step 6. Now a pair of Parani-SD is configured to make automatic connection, whenever power off
and on.
Just use this pair of Parani-SD like virtual serial cable.
* Note: While pairing is progressing by the pairing signal, the Command Response will be
inactivated automatically. Then, Parani-ESD will not send the response messages such as OK,
Connect and Disconnect.