ANet-2E4SM Modular Smart IoT Gateway is a general-purpose intelligent communication management machine independently developed by ankerui Electric Co., Ltd. it divides the interface of the traditional management machine into modules that can be assembled and matched. The main module can work independently as a standard intelligent communication management machine. The whole equipment can collect water meters, gas meters, electricity meters through serial ports, Ethernet and other links For the data of microcomputer protection and other equipment terminals, the standard 8-way passive dry contact can collect the switching value information such as access control, flooding and smoke detection in real time, and upload the alarm, real-time data and other information through wired network, 4G network and other links. The master module and slave module can be flexibly expanded to add richer application scenarios. At the same time, they can also provide requirements such as edge computing..