Virtual device reading values from devices on other controller (not the same network)
I would like somehow to connect two controllers that are far from each other through eg. virtual device on controller A that could read values from devices on controller B.
Example - I have controller at my garden house (cottage) with motion and door sensor. At my house I have different controller with eg siren device.
I would like to make siren at home to start when there is a intruder alarm at my garden house (I have pish a mail notifications setup).