@Nico Was kann die denn smartes?
@Nico ESP really is the swiss army knife of microcontrollers, isn't it?
Where does it send the message when the bell rings? Phone?
@shobe It's just awesome what you can do with these things.
Almost every day I have to hold myself back from buying another bunch of these :D
Regarding the doorbell:
The ESP sends a message to my homebridge (https://homebridge.io/) and thus sends a push notification to my phone.
... how it started :)