SNMP and custom OID?

Hi everyone.

I’ve been working with ROS for a year now, and love it…and still learn new things almost every day.
But one issue I still haven’t quite grasped yet is SNMP and oid in ROS… Is it possible to make custom oid so I can pull those values?
If not, any other ideas how I can get custom values from the mikrotik? SNMP trap?

The idea is to connect a device throu serial cable, and pull values from the device and maybe implement it throu SNMP…

Thanks

Did you ever find out any clues , as i am looking for the same here.