The Industrial IoT Edge Gateway R40 is an industrial-grade OpenWrt IoT device with multiple functions. It integrates an Industrial Router, Gateway, RTU, and DTU functionality in one unit. The highly cost-effective product simplifies IoT systems by reducing hardware connections and maintenance requirements.

With dual SIM design, built-in WIFI module, Ethernet connection, and various IO interfaces, it is suitable for a broad range of applications. The most common use-cases are IoT solutions for infrastructure (bridges, tunnels), agriculture (forest), mining, oil and gas, water, and industrial factory use cases.

The R40 supports IPsec, OpenVPN, and L2TP VPNs, as well as protocols such as Modbus and MQTT with local computing capabilities using shell scripts, C, or Lua programming.

It's under continuous improvement, Below are the newly added functions:
(1) Only upload changed data in MQTT Protocol;
(2) Can disable the Cellular Module;
(3) Support customized data format in MQTT Protocol;
(4) Modbus master poll cycle and response timeout can be setup;
(5) Can setup the start and end time and the number of cycles of the timer;
(6) LAN/WAN Port can be setup by manual;
(7) USB port can extend USB Disk, and share to the LAN Network computers.

https://devices.amazonaws.com/detail/a3G0h00000AkCvmEAF/Industrial-Cellular-Router

Industrial cellular router R40 is compatible with Huawei cloud, AWS IoT Core, MQTT, OPC UA, PLC protocol, Modbus TCP and Modbus RTU Master / Slave. Widely used in industrial wireless IoT applications.

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Industrial cellular routers are also called 4G industrial routers, WIFI industrial routers, VPN industrial routers, LTE industrial routers, industrial LTE routers, wireless industrial routers, and wireless industrial gateways.