Things Gateway - offline

[BoRRoZ]

How to monitor "gateway online"?

I’m thinking about a method / tool like a watchdog to get a message / signal that warns when my TTN-Gateway goes off-line. I could then e.g. start a reboot to get it on-line again. If, for example, I had a tool to read the “… seconds ago” from the console-page … I’d be happy , because when the “seconds” turn into “minutes” it is most probably an off-line situation. Because I have no clue, my question is: Anybody any ideas ?