系统设计主要功能和技术难点
1、基于手机APP的远程温控风扇实现的主要功能
(1)　DS18B20实时温度采集自动控制功能；
(2)　LCD12864液晶显示界面设计；
(3)　基于手机APP的蓝牙远程控制功能；
(4)　可通过按键设置温度阈值；
(5)　语音提示功能；
2、设计中需要解决的技术难点
(1) 实时自动检测温度，并检测温度是否达到上下限，驱动风扇的运行；
(2) 蓝牙模块与单片机的数据通信；
(3) 手机app的设计与实现(The main functions and technical difficulties of the system design
1,the main function of remote temperature control fan based on mobile APP
(1) DS18B20 real-time temperature acquisition automatic control function;
(2) LCD12864 LCD interface design;
(3) Bluetooth remote control function based on mobile phone APP;
(4) the temperature threshold can be set by pressing the button;
(5) voice prompt function;
2, the technical difficulties need to be solved in the design
(1) real time automatic detection of temperature, and check whether the temperature reaches the upper and lower limits, drive the operation of the fan;
(2) data communication between Bluetooth module and mcu;
(3) design and implementation of mobile phone app)