The HC-05 Bluetooth module is Slaveand master two in one module.

Module parameters:
1.Input voltage: 3.6V-6V
2.Working voltage: 3.3V
3.The module default baud rate is 4800, the default pairing password is 1234, the default name is HC-05
4.Leads 6 feet: EN/VCC/GND/RXD/TXD/STATE (Bluetooth state leads, not connected output low level, the output high level after connection)
5.With the connection status indicator, LED flash indicates no Bluetooth connection; Led slow flash indicates enter at command mode
6.On-board 3.3V voltage regulator chip, input voltage DC 3.6V-6V; When not paired, current about 30mA (due to LED lights flashing, current in the state of change); After the pairing succeeds, the current is about 10mA
7.Keep pressing the reset button and power on the Bluetooth module to enter AT mode.

Wiring method:
VCC: Connect the power supply positive
GND: Connecting the cathode
RXD: The receiver, the Bluetooth module receives data from other devices, and the sending end TXD of the other devices normally
TXD: Send end, Bluetooth module sends data to other equipment; the receiving end RXD of the other equipments normally
En: To enable the end, need to enter the at mode when 3.3V

Note:
1.this item doesn't works with iOS.
2.Input power supply 3.3~6V, Prohibit more than 7V
3.If the circuit is reversed, the module will not work.

Application:
HC 05 Bluetooth module can use for Bluetooth feature project.With 6 Pin dopunt cable of HC-05 Wireless BT Module,
you can easily connect this HC-05 Bluetooth module

Package included:
2* HC-05 Bluetooth Module