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Promi-SD User Manual – Appendix A. AT Commands A-2

Terminology

 AT Command

AT command set is the H Tde facto standardT H HT languageTH for controlling H TmodemsT H. The AT command set was developed

by H T HayesTH and is recognized by virtually all H T personal computerTH modems. Promi-SD provides the extended AT

command set to control and configure the serial parameters and Bluetooth connection.

 AT Response

Promi-SD replies to AT commands with 4 kinds of message, ‘OK’, ‘ERROR’, ‘CONNECT’ and ‘DISCONNECT’.

 Operation Mode

 Mode0: Waiting for AT commands

 Mode1: Attempting to connect to 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 devices

 Operation Status

 Standby: Waiting for AT commands

 Pending: Executing tasks

 Connect: Transmitting data

 Security

 Authentication: Pin code (or Pass key)

 Encryption: Data encryption

 Symbols

The symbols are used for the description of command syntax as follows:

Symbol Meaning ASCII Code

 Carriage return 0x0D



Line feed 0x0A



Carriage return + Line feed

112233445566 Bluetooth device address

n or m One digit decimal number

to Timeout in second

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 57 58

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Sena 205 User Manual Page 33