设计一个机房环境监测系统，实现机房温度检测，该机房环境监测系统程序应实现下列功能：

　　(1)能够检测到机房周围的温度，并显示在开发板上。

　　(2)若温度超出常温范围（常温范围为＋15°C～＋25°C）报警。

(3)能够实现单片机串口通信，并将此通信程序和检测温度程序合并在一起。

　　(4)能够实现PC机串口通信，将现场温度立即显示在计算机屏幕上。-Design a room environment monitoring system, to achieve room temperature detection, the procedure room environment monitoring system should achieve the following functions: (1) to detect ambient room temperature, and shows the development board. (2) If the temperature exceeds normal temperature range (temperature range of+15 ° C ~+25 ° C) alarm. (3) to achieve single-chip serial communication, and communication procedures and test the temperature of this process are combined. (4) to a PC serial port communication, the field temperature immediately displayed on the computer screen.