ARF32 Datasheet, PDF (13/19 Pages) List of Unclassifed Manufacturers – ARF32 Bluetooth® Modules User Guide

A^RF32 User Guide
Operating modes
There are two main operating modes in the module : command mode and
transparent mode.
The command mode is used to set up the Bluetooth^® link between two
pieces of Bluetooth^® equipment.
The transparent mode is used to transfer data between two pieces of
Bluetooth^® equipment.
Command mode
A specific protocol is used to send commands to the Bluetooth^® module.
The frame format is the following :
All the values are in hexadecimal format.
Start
delimiter
1 byte
Packet type Operation
code
1 byte
1 byte
Data
length
2 bytes
Check-
sum
1 byte
Data
<data
length>
bytes
End
delimiter
1 byte
Start delimiter: 02 (<STX>)
Packet type : 52 (‘R’ for request), 69 (‘i’ for indication), 43 (‘C’ for confirm)
Operation code : command dependent
Data length : size of data. First byte is the Least Significant Byte and
second byte is the Most Significant Byte
Checksum: Sum of all bytes from the packet type field to the data length
field
Data : command data
End delimite r: 03 (<ETX>)
Example of the inquiry command
Start
delimiter
02
Packet
type
52
Operation
code
00
Data
length
03 00
Check-
sum
55
Frame : 02 52 00 03 00 55 0A 00 00 03
Data
0A 00
00
End delimiter
03
Ref. 08-07-V10-ltu
p 13
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