Realize agreement
* Realize Bluetooth serial profile.
* LM, LC, L2cap, SDP and RFCOMM

Pin specification:
1. clearup saved Bluetooth address(input)
2. connect instruction output high level under connection(output)
3. clearup transmission(input)
4. request transmission(output)
5. serial data input
6. sleep/awaken(input),connect high level when it is free
7. do not connect
8. the source of power supply
9. the pressure of electrical source(input)

Features:

*Compatible with V2.1+EDR criterion
* Cambridge Silicon Radio BC212015
* Effective distance: Class 1(100m)
* External antenna
* Working temperature: -20°C~+70°C
* Power supply : 7.5V~8V
* Support SPI interface
* Standard UART interface
* Support multi baud rate(suchasl.2k, 2.4, 4.8, 9.6k, 19.2k, 38.4k, 57.6k, 115.2k etc.),
The maximum is 1.384Mbps( the original baud rate is 9.6K)
* Energy saving automatically mode.
* Support Iow power working mode/high speed working mode
* Safe authentication, data encryption, anti-jamming.