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[shramik_salgaonkar]

@cybermerlo

In fact, I need to get the value in a raspberry pi (a magic mirror running https://magicmirror.builders/ which have a module that support mqqt).

nice. what do you want to do and achieve with it.
you can have a look at this tutorial.

Executing custom code on your Raspberry Pi from Cayenne

A frequent question on the forum has been how Raspberry Pi users can run any code on their Pi, triggered from a Cayenne action or widget. This is possible with your Pi connected through our ‘Bring Your Own Thing’ MQTT API, so I’ve made a quick guide to show how to do this. Setup For this example to work, your Pi must be connected to Cayenne via the MQTT API rather than via the original Cayenne Pi Agent software. To do this, follow the ‘Installation’ and ‘Cayenne Setup’ instructions for …