It's not on AWS but runs on a local raspberry pi, but my doorbell signals via MQTT that someone ringed. This makes my security camera take a picture and sends a push notification to a custom made iOS app which shows who's in front of the door on my apple watch. If I'm logged in my home wifi, I can even open the door with a button directly from this notification. I would argue that I'm not the only one who finds that useful.

Is "signalizes" a word? Did you mean "signals"?

Thanks, I've corrected it.

To know when someone ring your doorbell but you are not in home so that you can connect through voip to speakerphone near doorbell and speak with someone who stands before your door.

It's probably one of first examples, like "Hello World!". Who in their right mind would write hello world, they are written for all languages already.

Probably to make use of their whole IoT platform, such as https://aws.amazon.com/greengrass/. I still wouldn't use it over a properly architected local solution (being a software architect with focus on security), but if you _really_ don't want to write the non-feature-specific code then I suppose their stuff isn't that bad.

There's actually a very good use case if you have sleeping children:

https://www.alittletothewright.com/index.php/2017/05/doorbel...

Indeed. We just bought a house and I'm excited to actually invest (in terms of electronic projects). Top thing on my list is to make the doorbell send a notification when our little one is sleeping, instead of sounding.

From experience you want to get them used to noise rather then keeping things quiet.

With the first child, I made the mistake of hanging out of the window at 10PM trying to get the attention of the pizza guy so he didn't ring the door bell so we got to eat in peace.

By the third child, you could set a firework off in the living room and she'd stay in bed.

Be noisy! Be free!

So that anything else that is connected to AWS can control your doorbell. Maybe the doorbell could have different sounds depending on what service (pizza, Amazon,friends) is on its way or just pulling up to the driveway right now.

I think a smart doorbell is a great idea for a product.