[Observium] Sensors & syslog Questions

Hi,

I have been trying observium for the last few weeks and am happy with it. However, I couldn't get the sensors (temperature & voltage) and syslog to work. It doesn't even show up in the health drop down menu!. Does observium obtain the sensors data using lm-sensors or ipmi? And is there any other configurations steps to be done (other than in the wiki or documentation)?. Regarding syslog, I tried rsyslog and syslog-ng and followed the solutions posted in wiki & mailing list for similar issues but no luck!, the tab still says that no syslog entries found although its enabled and running (Note: I am using CentOS & RHEL). What am I missing exactly?

Many Thanks,