L1.4 HC 05 with Arduino : Introduction to HC-05 Bluetooth Module

Brief about HC-05 Bluetooth Module -

HC-05 module is an easy to use Bluetooth SPP (Serial Port Protocol) module, designed for
transparent wireless serial connection setup.
Serial port Bluetooth module is fully qualified Bluetooth V2.0+EDR (Enhanced Data Rate) 3Mbps
Modulation with complete 2.4GHz radio transceiver and baseband. It uses CSR Bluecore
04-External single chip Bluetooth system with CMOS technology and with AFH(Adaptive
Frequency Hopping Feature).

Specifications
Hardware features
 Typical -80dBm sensitivity
 Up to +4dBm RF transmit power
 Low Power 1.8V Operation ,1.8 to 3.6V I/O
 PIO control
 UART interface with programmable baud rate
 With integrated antenna
 With edge connector

Software features
 Default Baud rate: 38400, Data bits:8, Stop bit:1,Parity:No parity, Data control: has.
Supported baud rate: 9600,19200,38400,57600,115200,230400,460800.
 Given a rising pulse in PIO0, device will be disconnected.
 Status instruction port PIO1: low-disconnected, high-connected;
 PIO10 and PIO11 can be connected to red and blue led separately. When master and slave
are paired, red and blue led blinks 1time/2s in interval, while disconnected only blue led
blinks 2times/s.
 Auto-connect to the last device on power as default.
 Permit pairing device to connect as default.
 Auto-pairing PINCODE:”0000” as default
 Auto-reconnect in 30 min when disconnected as a result of beyond the range of connection.