title: How to aggregate telemetry data from different devices contained in one asset?
body: <p>I'm working with Thingsboard Community Edition 2.0.</p>
  
  <p>I have one asset that contains two different devices. Both devices send telemetry data with the same key. I want to be able to show the sum of both values as the total for the asset.
  Did anyone figure out how to do it?</p>
  
  <p>Thanks.</p>