HC-06Master - HC-06 Master Module Wireless Bluetooth Transceiver Module RS232/TTL

Hardware details:
Built-in CSR company Bluetooth chip BC417143
Bluetooth Technology v2.0 + EDR
TTL data transparent transfer between a host Bluetooth device
Compatible with all Bluetooth adapters that support SPP
Coverage up to 30 ft / 10 m
Built in antenna
Power input: +3.3VDC (bluetooth module)
Can set the module control parameters and control commands via AT commands
The maximum serial baud rate: 1382400 bps, support for hardware flow control transfer
Provide seven input and output ports
Connection/non-connection status indicators

Pin definition
Pin 1: (UART TX - weak internal pull-up) UART data output
Pin 2: (UART RX - weak internal pull-down) UART data input
Pin 11: (RESETB) - connect to ground to reset, pullup-resistor of 10K recommended
Pin 12: (VCC) Working range 3V1 to 4V2
Pin 13: (VSS) Ground
Pin 21: (VSS) Ground
Pin 22: (VSS) Ground
Pin 24: (PI01) ON when paired/connected, PULSING when not paired/connected
Pin 26: (KEY - MASTER only): LOW for normal operation; HIGH erase pairing/connection information;
after erasure, searches for new device to pair with/connect to randomly.

HC Serial Bluetooth Products User Instructional Manual