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Your First Message


What you will learn:

Luos engine aims to exchange information between services by sending messages. In this tutorial, you will learn messages' structure and how to send one to another service.

Luos message
Message handler

A button can be represented (as a LED) by a state-type service. But contrary to the LED, the button will have to send a state value instead of receiving it.

A button service only has to manage a button, so it is kind of dumb! Your button service doesn't know where it needs to send its value, that's why you will have to program a reaction from an external request.

Your button service will have to receive a request message asking for the state of the button, then the service will have to send the state's value back to the asking service.

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