A configurable, manageable and scalable communications gateway for industrial IoT applications. Network connectivity choices to data management platforms include 4G-LTE, 3G, 2G and Ethernet. Accessory cards provide the local wired or wireless field asset connectivity and plug directly into the rear of the gateway. Available options include a LoRaWAN-ready mCard capable of supporting long-range RF modules connected to remote sensors or appliances. Includes a graphical drag-and-drop interface or mLinux Open Embedded/Yocto.