
Chapter 2 – AT Commands
Multi-Tech Systems, Inc. SocketWireless Bluetooth AT Commands (S000360H) 33
Notes:
• If the remote Slave device is not present or the service is not available, NO ANSWER
will reply after the master connect timeout and you will have to try again.
• If security is enabled and the radio is connecting to a PC that has not yet been paired
with it, the <cr_lf>PAIRED,12345678912<cr_lf> message may return twice prior to the
CONNECT.
• By using the ATDC command connection time will be decreased to approximately
500ms.
DC Dial Channel
This command connects to a remote device by Bluetooth address and service channel number (RF Comm
ID). This will decrease the connection time to approximately 500ms.
Format: ATDC,<BT Address>,<Service Channel Number>
Parameters:
• BT Address: Bluetooth Address, 12 hex characters MAX
• Remote Service Channel#: 0-3
Return Parameters: <BT Address> or <Channel Number><BT Address>
Point-to-Point Example:
TYPE: ATDC,123456789012,1<cr>
REPLY: <cr_lf>OK<cr_lf>
<cr_lf>CONNECT,123456789012<cr_lf>
OR
<cr_lf>OK<cr_lf>
<cr_lf>PAIRED,123456789012<cr_lf> // if security is enabled
<cr_lf>CONNECT,123456789012<cr_lf>
OR
<cr_lf>NO ANSWER<cr_lf> // if device not present
Multi-Point Example:
TYPE: ATDC,123456789012,1<cr>
REPLY: <cr_lf>OK<cr_lf>
<cr_lf>CONNECT,00,123456789012<cr_lf>
OR
<cr_lf>OK<cr_lf>
<cr_lf>PAIRED, 123456789012<cr_lf> // if security is enabled
<cr_lf>CONNECT,00,123456789012<cr_lf>
OR
<cr_lf>NO ANSWER<cr_lf> // if device not present
Notes:
• Use the ATRRSN command to get a remote service channel number from another
device.
• If the remote Slave device is not present or the service is not available, NO ANSWER
will reply after the master connect timeout and you will have to try again.
• If security is enabled and the radio is connecting to a PC that has not yet been paired
with it, the <cr_lf>PAIRED,12345678912<cr_lf> message may return twice prior to the
CONNECT.
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