Serial Bluetooth Module

This small size Bluetooth TTL transceiver module allows your target device to both send or receive the TTL data via Bluetooth technology without connecting a serial cable to your computer. It's easy to use and completely encapsulated.

PIN define：

• STATE -You can connect a external LED to indicate the bluetooth state. It same as the state LED on the module.
• RXD -Receive data
• TXD -Send data
• GND -Power ground
• VCC -DC power in (3.6V-6VDC)
• KEY -Turn on/off this module by this pin.(1- OFF, 0/Open- ON)

Specifications:

    TTL data transparent transfer between a host Bluetooth device.
    Works with any USB Bluetooth adapters.
    Default Baud Rate: 9600,8,1,n.      Device Name:tinyos   key:1234
    Coverage up to 30ft.
    Built in antenna.
    Power input: 3.6V-6VDC(Can not higher than 6V).
    Mini Size.

AT command sets

• Communication test

Send 'AT',If module received this command success the module will reply 'OK'  

• Change Baud Rate

Modify the Baud Rate of the module:Send 'AT+BAUD1' (BAUD must be capitalized),If setting success the module will reply 'OK1200'  

The number after BAUD means the baud rate you want set：
1----1200bps
2----2400bps
3----4800bps
4----9600bps
5----19200bps
6----38400bps
7----57600bps
8----115200bps
9----230400bps
A----460800bps
B----921600bps
C----1382400bps

• Change Device Name

Send 'AT+NAMEname',If module received this command success the module will reply 'OKname'  

• Change Pair number

Send 'AT+PINxxxx',If module received this command success the module will reply 'OKsetpin'  

xxxx is that pair number you want to set. It must be 4 digits.

Document:

Datasheet & AT command