This is a mini Bluetooth Module. Input voltage 3.3v ~ 6v, module with 3V LDO voltage regulator. Support AT command set the baud rate, name, pair password. Search and pairing automatically when the power up. Power, link status indicator.
– The default communication baud rate is 9600, matching the password is 0000 or 1234 Lights blinking when the search.
– Steady light means connected to the host device.
Pins
TXD, RXD, GND, VCC
AT command
Testing Communication
Send: AT (return OK, one second left and right once)
Returns: OK
Bluetooth serial communication baud rate change
Send: AT + BAUDI
Returns: OK1200
Send: AT + BAUD2
Returns: OK2400
BAUD1 ——— 1200
BAUD2 ——— 2400
BAUD 3 ——— 4800
BAUD 4 ——— 9600
BAUD 5 ——— 19200
BAUD 6 ——— 38400
BAUD 7 ——— 57600
BAUD 8 ——— 115200
Note:
– Interference causes system instability
– It is not recommended for use in more than 115,200 baud rate .
– It will save after power off automatically.
Bluetooth name change
Send : AT + NAMEname
Returns : OKsetname
Parameter name: The name of the current to be set , the Bluetooth name is searched. (Within 20 characters)
For example: sending AT + NAMEdagu
Return OKsetname
At this time the name of the Bluetooth bill_gates. Parameters can be powered down to save , simply modify one . PDA client refresh services can be seen after the change of the name of the Bluetooth.
Bluetooth pairing password change
Send : AT + PINxxxx
Returns : OKsetpin
Parameter xxxx: pairing password to be set [4 bytes].
This command can be used slave or master. When connecting to the bluetooth module, a passcode from the manual input of this parameter can be connected from the machine. Primary Bluetooth module search from the machine, if the password is correct, it is automatically paired. In addition to the main module, the module can be connected to the outer pair of other products from the module contains the pair can be connected. For example, a digital camera containing Bluetooth, Bluetooth GPS, Bluetooth serial printers, and the like.
For example: sending AT + PIN8888
Return OKsetpin
Therefore the Bluetooth passkey is set to 8888. Parameters can be powered down to save, simply modify once