Thingsboard tutorial (II and III): calculating the temperature difference between two devices in a regular chain

Preface

There is such a need , There is a thermometer outside , There is a thermometer in the room , We need to calculate the temperature difference between indoor and outdoor .
If you have similar needs , Please read this article carefully .

preparation

First create an asset , be called Fizz Home.
Then create two devices , Outdoor Thermometer , Indoor thermometer . And combine the two equipment and assets FizzHome Connect . We need to create the relationship between assets and equipment , Here's the picture

When I'm done

Rule chain of intelligent thermometer simulator

Use generator Node to generate the data of intelligent thermometer , The device needs to be bound when generating , You need to set the number of messages and the period .
Install the above figure to set .

When the configuration is complete , Link it to the root node , as follows

Root node