说明：  该智能家居系统的硬件主要包括ARM主控模块的选型、报警I／O电路设计、以太网接口 电路设计、图像处理模块电路和“三表"的串行口电路组成。
(The hardware of the smart home system mainly includes the selection of ARM main control module, alarm I / O circuit design, Ethernet interface circuit design, image processing module circuit and "three meter" serial port circuit.)