HC-08 Bluetooth Serial Port Module Bluetooth 4.0 Low Power Consumption

Feature:

The core module size: 27mm x 13 mm x 2mm.
TXD: serial port, 3.3V TTL level delivery
RXD: serial port, 3.3V TTL level receive
CTS: serial flow,does not support 
RTS: serial flow, does not support 
DC: simulation, burn the clock pin.
DD: simulation, recording data foot.
RST: module reset pin, need a low level of not less than 5ms was reset.
VCC: modular power supply pin, DC 3.3V power supply, power supply current is not less than 100mA. Working voltage range: 2.0V~3.6V.
LED: module indicating lamp output pin, high level output, connected to LED please series connect resistance.
before connection ,
when host do not recorded  slave address , per second on 100ms;
when host recorded  slave address, bright 900ms;
the slave every 2 seconds light 1 second.
After connection, LED often bright.
KEY: input pin, internal pull-down. This pin is connected with a high level, for the host to remove recorded the slave.
PIO: extended function for setting module'master-slave mode, the default internal pullups, for the slave 
external pull down resistor 1K to ground, for the host.

The AT instruction set:
(1) the test instructions
Transmission: AT
Returns: OK

(2) modify the serial baud rate
Transmission: AT+BAUD1
Returns: OK1200
Transmission: AT+BAUD8
Returns: OK115200

Supports the following 8 baud rate:
1--------- 1200
2--------- 2400
3--------- 4800
4--------- 9600 (the default is this setting)
5--------- 19200
6--------- 38400
7--------- 57600
8--------- 115200

Package included:

1 x HC-08 Bluetooth Serial Port Module Bluetooth 4.0 Low Power Consumption Microampere Level Current