The edge computing gateway BL300 series is designed according to the harsh industrial environment. It adopts industrial-grade microprocessor with a main frequency of up to 800Mhz, provides 512MB RAM and 8G ROM, pre-installed Linux and Ubantu operating systems, supports QT graphics tools and Node-Red, and is compatible with MQTT protocol, Modbus TCP protocol, OPC UA protocol, PLC protocol, etc. The edge computing gateway BL300 series provides a wealth of I/O interfaces, providing 1 isolated WAN port, 1 LAN port, 4 RS485, 1 CAN, 1 USB, 1 HDMI interface, 2 DI, 2 DO. The edge computing gateway BL300 series is a rugged and economical edge computer and an industrial IoT gateway. The metal shell ensures its EMC and EMI performance. It is small in size and supports DIN35 rail and wall installation. It is suitable for industrial IoT and industrial Automation Control applications.