User's Manual

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A.1.4. 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.1.5. Pairing Signal (only for Parani-ESD100/110)
Parani-ESD100/110 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.
Table 0-1 Pairing Process by Pairing Signal
ESD100/110 Status Pairing Signal ESD200/210 Status Paring Signal
1. Hard reset Mode0 HIGH 1. Hard reset Mode0 HIGH
2. Drop pairing
signal
Mode3 LOW 2. Drop pairing
signal
Mode3 LOW
3.Restore
pairing signal
Mode3 HIGH 3.Restore
pairing signal
Mode3 HIGH
4. Drop pairing
signal
Mode1 LOW
5.Restore
pairing signal
Mode1 HIGH
6. Connected Slave HIGH 6. Connected Master HIGH