Create 2 y-axes

Create 2 y-axes

How do I create 2 y-axes and associate the correct data points to the appropriate y-axis?

Also, is there a way to rename the data point so it's not the same as what's listed in the device?  For instance, I'd like the legend to show "Temperature", but the data point name is shown "temp_sht".  Most non-techie users will wonder why the name is odd.