User's Manual

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Appendix C: Trouble Shooting
C.1. Data Loss or Malfunctioning
C.1.1. Response Message
AT response messages from the Parani-SD may affect the host system unexpectedly. Do not use
Parani-SD If your applications cannot allow for this wireless time delay.
C.2. Transmission Delay
C.2.1. RF Processing Delay
It takes 30msec approximately for a Parani-SD to complete a data transmission to the other Bluetooth
device. This time delay cannot be reduced and may enlarge as the RF transmission environment
becomes worse. Do not use Parani-SD If your applications cannot allow for this time delay.
C.2.2. RF Transmission Environment
If there are many Bluetooth devices working in a small area and/or the RF communication distance is
too great and/or there are some obstacles affecting RF performance, the Parani-SD repeats the
transmission packet by packet due to interferences and/or low RF performance. This may lead to
increased data transmission time delays.