I’m looking for a vibration or sound sensor that would detect when somebody ‘knocks’ on our door. We have this huge iron door knocking thing. And i’m trying to make it smart. Because if i’m upstairs, i won’t hear it.
So does anyone know a sensor that could do that? It must be pretty sensitive.
It also has configurable sensitivity (when I replace the battery the sensitivity reverts back to its most sensitive, and the sensor reacts even to gusts of wind, so it’s pretty sensitive).