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Appendix B: AT Commands
B.1. Terminology
B.1.1. AT Command
AT command set is the
HT
de facto standard
T
H
HT
language
T
H
for controlling
HT
modems
T
H
. The AT command set was
developed by
HT
Hayes
T
H
and is recognized by virtually all
HT
personal computer
T
H
modems. Parani-SD
provides the extended AT command set to control and configure the serial parameters and Bluetooth
connection.
B.1.1. AT Response
Parani-SD replies to AT commands with 4 kinds of message, ‘OK’, ‘ERROR’, ‘CONNECT’ and
‘DISCONNECT’.
B.1.2. Operation Mode
Mode Description
Mode0
Waiting for AT commands
Mode1
Attempting to connect the last connected Bluetooth device
Mode2
Waiting for the connection from the last connected Bluetooth device
Mode3
Waiting for the connection from any other Bluetooth device
B.1.3. Operation Status
Status Description
Standby
Waiting for AT commands
Pending
Executing tasks
Connect
Executing tasks
B.1.4. Security
Security Description
Authentication
Pin Code (or Pass key)
Encryption
Data encryption
