How to Determine the Correct OID to Use for Monitoring

From my experience, sadly no, I had to get the MIB and try to find in them the correct thing I need to query. (I used a simple mib browser)

For the OID you found, temperature too high, be sure it’s not a boolean value that set it at on/1 when it trigger, it could explain why you read nothing if the device is operating under normal temperature.

Sadly OID usage and documentation is underated online and not popular. I used to create monitoring templates inside a monitoring tool for unknown device from the tool, and I was seen as a black magic user to do so..

The only tip I can tell is watch for the return value, some are string even if they are wrote as a number, and other are simply integer.