Wake up the dongle connected to the home wi-fi network

When my autopi comes home, the cellular signal vanishes. He connects to home wifi. How can I talk directly to the dongle via the local network?
How can I wake up the dongle via wifi when the cellular network is down?

I guess it depends on what you mean by “talk directly to the dongle”.

You can ssh to the device ( How to SSH to your dongle ) - I do that to read logs.

But as far as I know, the only way to wake it up is to turn the car on or send an SMS.