E90-DTU(400SL30)E is a wireless gateway (Ethernet interface data transmission radio) that supports 10M/100M rate and based on LoRa communication technology and Ethernet protocol . Supports 2-way Socket, provides six working modes: TCP Server , TCP Client , UDP Server , UDP Client , HTTP Client , MQTT Client , and supports six client connections in TCP server mode . Wireless communication uses LoRa direct sequence spread spectrum technology, which will bring longer communication distances, and has the advantages of concentrated power density and strong anti-interference ability. It has a software FEC forward error correction algorithm, which has high coding efficiency and strong error correction capability. In the case of sudden interference, it can actively correct the interfered data packets, greatly improving reliability and transmission distance, and helping users to efficiently Complete long-distance data transparent transmission. Support users to perform relevant configuration through W EB web page and UDP host computer