Hello LOGO! community,

I would like to share with you a visitor greeting solution that I built using LOGO! controller, motion sensor and Alexa device (Echo).

Functional description: A visitor comes to my house, motion is detected via LOGO! and Alexa greets a person and offers help. For example, Alexa can suggest to adjust temperature in the house or turn on/off lights, a TV, play music. 

This required the following configuration: motion detector is wired to DI input of Siemens LOGO!, the tag data is being sent to the AWS IoT cloud, the motion sensor tag is analyzed and stored on the cloud. When motion is detected, it triggers lambda function that invokes an Alexa skill.

Here is a link to my demo so you can see things in action: https://youtu.be/bQ3qZvfU3oM

It took me half a day to build and test it. The hardest part was to figure out how to invoke Alexa, because normally a person initiates the conversation with an echo (Alexa) device not the other way around. IFTTT did the trick and I was able to make the idea come to live! 

I am attaching an architecture diagram as a pdf document. Please let me know if you have any questions!

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