1. I want to get 2 lastest telemetry in my device by using rule engine in thingsboard, but I can get it. The result returns the lastest telemetry.
   How to get 2 lastest telemetry in thingsboard ?

2. And I had connected thingsboard to kafka, but when I post the data from DHT22 to the thingsboard, the telemetry change everytime despire of I don’t change it in DHT22. And the data I had in the kafka is very cazy. Emxample:
   First I change the data:
   humidity: 20, temperature: 30
   Second I change the data:
   humidity: 23, temperature: 34

Because the data I post continuosly, the result must have been:
humidity: 20, temperature: 30
humidity: 20, temperature: 30
…..
humidity: 23, temperature: 34
humidity: 23, temperature: 34
…..

But the result I received is:
humidity: 20, temperature: 30
humidity: 23, temperature: 34
humidity: 20, temperature: 30
humidity: 23, temperature: 34
humidity: 23, temperature: 34
humidity: 20, temperature: 30
….