Problem using smart home on Raspberry pi with integrated Alexa not certified? - raspberry-pi

I have installed Alexa Voice Service (AVS) Device SDK on a Raspberry Pi.
I want to use smart home to turn on a led on my raspberry pi via the Alexa command.
To do this, I followed the following tutorial: https://developer.amazon.com/en-US/blogs/alexa/device-makers/2020/04/create-a-sample-alexa-built-in-disco-ball-with-smart-home-for-av
When I ask Alexa to turn on my led, the answer is "this feature is only supported by Alexa integrated devices".
I wait for Alexa to execute my request.
Is it really impossible to use this feature until the device is certified? Or have I done something wrong?
Thank you very much in advance for your help!

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[ http://wiki.qt.io/Main ]