Sending multiple sensor data to the cloud using Arduino is pretty easy.
You can send upto 6 data types to the cloud.
All you have to do is change the code which sends data to the bolt.
When you want to send more than one data type (Example you want to send Temperature, Humidity and a digitalPin status), all you have to do is print all 3 with commas to seperate them.
So lets say the temperature is 30 degrees, the Humidity is 40%, and the digital pin is high then you would have to pring
Then on the product on the cloud, you have to configure the product hardware to monitor 3 CSV (Comma Separated Values) and give a variable name to each one of them.
The cloud side code will separate the sting into its individual components, and you will be able to plot each one of them separately.
You can use the multigraph feature to visualise all of them simultaniously