User's Manual

Appendix D: Trouble Shooting

D.1 No Data Transmission

D.1.1 COM Port Settings

Check whether the Baud rate of Parani-SD is same as that of its host equipment.

You can know the

Baud Rare if you check the dipswitch. If it is Atcommand mode, you can initialize Baud rate to 9600 by

pressing Reset Button.

Check whether the Data bit is set to 8. Parani-SD supports only 8 Data bit. If your host equipment

uses 7 Data bit and even or odd parity, it can work as if it uses 8 Data bit and No parity. This is valid

only when both DCE devices are Parani-SD. In this case, set both Parani-SDs to 8 Data bit and No

parity. If one of DCE devices is other Bluetooth device such as Bluetooth USB dongle, please contact

Technical Support.

Check whether the Parity and Stop bit of Parani-SD are same as those of its host equipment. Parani-

SD supports No parity, Even parity and Odd parity, 1 and 2 Stop bit.

Check whether the host equipment of Parani-SD uses Hardware Flow Control. Parani-SD is initially

set to Use of Hardware Flow Control. If your host equipment does not use Hardware Flow Control, set

the Hardware Flow Control of Parani-SD to No use.

The Hardware Flow Control can be changed only

by dipswitch.

Parani-SD does not support RS-232 break signal.

D.1.2 Pin Assignment

Parani-SD is DCE device. If your host equipment is DTE, plug Parani-SD directly to the host

equipment or use straight RS-232 cable. If your host equipment is DCE, use cross over RS-232 cable

(Null modem cable).

D.2 Data Loss or Malfunctioning

D.2.1Hardware Flow Control

When transmitting large data with No use of Hardware Flow Control, Parani-SD will clear the data

buffer unexpectedly. This possibility goes higher as the RF transmission environment is bad.

D.2.2 AT Response