I don't think I have seen this topic so . . .
We have a generator (Generac) that runs off natural gas. I would like to get a notification when it's running. It basically runs under two scenarios: (1) commercial power fails, the power transfer switch signals it to start and, once up to speed, switches the house load over to the generator; (2) once a week it runs a self-test/exercise for about 15 minutes. When it is doing the self-test/exercise it does not involve the transfer switch.
I am reluctant to hack into the wiring of this thing so I would like to see if I could determine that it is running by monitoring vibration or noise. I doubt I will have much luck with a sensor inside the housing as it is aluminum and I would think it would be difficult to get a signal out. It's located fairly close to the house so it is likely within range of z-wave or zigbee. It should be feasible to attach a weatherproof plastic box to the housing.
I've been looking and haven't seen sensors specifically for vibration or sound.
Generac apparently has an app and a wireless interface. The Generac community has pretty much panned it as trash. And it is fairly expensive. And it requires a subscription.
Any ideas? Alternative suggestions?