Android手机蓝牙模块的使用demo，实现了手机发送简单控制指令给下位机；手机与手机通过蓝牙的互聊，即蓝牙版的扣扣，-Android phone Bluetooth module demo, the phone sends a simple control instructions to the lower machine mobile phones and mobile phone via Bluetooth cross-talk, Bluetooth version QQ, huh