User's Manual

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Appendix D: Trouble Shooting
D.1 No Data Transmission
D.1.1 COM Port Settings
Check whether the Baud rate of Parani-ESD is same as that of its host equipment. If you don’t know
the current Baud rate, initialize it to 9600 by resetting
Check whether the Data bit is set to 8. Parani-ESD 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-ESD. In this case, set both Parani-ESDs 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-ESD are same as those of its host equipment. Parani-
ESD supports No parity, even parity and Odd parity, 1 and 2 Stop bit.
Check whether the host equipment of Parani-ESD uses Hardware Flow Control. Parani-ESD 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-ESD to No use.
Parani-ESD does not support RS-232 break signal.
D.2 Data Loss or Malfunctioning
D.2.1Hardware Flow Control
When transmitting large data with No use of Hardware Flow Control, Parani-ESD will clear the data
buffer unexpectedly. This possibility goes higher as the RF transmission environment is bad.
D.2.2 SD Response
The messages of AT response may affect the function of host system. Set ATS10=0 not to send AT
response to host system and try again. Refer Appendix B. for details.