All the HP SmartArrays I've worked on have included temperature probes.
How specifically, you would access yours might depend on the specific model you have, and it may be different on Linux, but the ACU [Array Configuration Utility] is should be accessible online. Here's the link to a manual for one of the arrays I admin. Search HP's site for the manual specific to yours.
Launching ACU on a local server
1: From any command prompt, enter one of the following:
o For local mode, enter: cpqauxe-nosmh
o For remote mode, enter: cpqacuxe-R
ACU launches in a browser (Mozilla Firefox).
2: For a list of options, enter the following:
And, if you head down to page 54, there's an explanation of the "show" command, and the example output contains readings from the temperature probes on the array.