User's Manual

Enhanced Class 1 Bluetooth v2.1 Module
User’s Guide
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www.lairdtech.com/wireless
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CONN-GUIDE-BT740_v0.2
8.8 Host Command/Responses
This section describes all host commands and confirms in detail what is specified via the
CMD_ID/CNF_ID field of all command and confirm packets.
The description for each command/confirm below is in the form of a command or confirm packet table and
a corresponding response packet table when appropriate.
Each command has a unique CMD_ID value in the range 1 to 63 (0x01 to 0x3F). 0 is reserved and
confirms a CNF_ID in the range 64 to 127 (0x40 to 0x7F).
The actual value of CMD_ID in the Value column is described as [Descriptive_Name] where
“Descriptive_Name” can be found in a ‘C’ header file which can be obtained on request from Laird.
The value of STATUS is similarly defined in a header file which can also be obtained from Laird.
The commands are grouped as:
 Informational
 Configuration
 Connection
 Inquiry
 Pairing
 Miscellaneous
They are described in subsequent sub chapters.
8.9 Information Commands
This group of commands obtain information about the module.
8.9.1 No Operation
This command results in no action other than to convey new FLOW_IN status to the module and get a
response packet with the latest status for the FLOW_OUT bits.
It is expected that a host uses this packet to poll for a change in the flow bits.
Command Packet
Offset
Field
Value
Comments
0
LENGTH
4
Fixed
1
CHANNEL
0
Fixed
2
COMMAND
[CMD_NO_OPERATION]
3
FLOW_IN
??
Runtime value
Response Packet
Offset
Field
Value
Comments
0
LENGTH
5