Odd question ... does anyone know of a small 'industrial' system with a simple DC relay type switch which establishes VPN (IPSEC?) over a 4G connection? I need to be able to power on/off a number of remote devices, and would like to potentially script and control this centrally?
I currently have a number of GSM 'gate opener' type devices that toggle on / off based on an SMS message, but these are a little insecure (people are starting to know the numbers) and do not allow any feedback as to current state (a few have been left powered up for extended periods)
I've looked into a number of industrial IoT gateway type solutions, but they all have clever serial/Modbus/SCADA control connections, but not a simple DC switch.
Odd ask, but any idea?
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