Remote PLC and HMI access is essential for modern industrial automation. This article explains how industrial cellular routers enable secure remote maintenance through VPN, firewall policies, NAT configuration, and reliable cellular connectivity. Learn best practices for connecting PLCs, HMIs, and industrial devices without exposing automation systems directly to the internet.

Can a low-resource LTE router with only 16 MB of flash and 64 MB of RAM reliably support OpenWrt and WireGuard? This article explores the hardware limitations of entry-level routers, including flash storage, memory, CPU performance, VPN encryption, and long-term stability. It also provides practical deployment advice, testing recommendations, and common failure scenarios. Finally, it compares the Wavetel IoT WR143 and WR255 industrial routers as reliable alternatives for industrial IoT.

Choosing the right router for a remote industrial site is more than just getting Internet access. This article explains the key differences between consumer 4G routers and industrial 4G/5G routers, covering reliability, remote management, VPN security, dual SIM redundancy, watchdog recovery, and applications such as PLC, HMI, SCADA, solar, utilities, and IoT deployments.