working code, suggestion required for improvement

[anna]

FAN speed is returning value like below

snmpwalk -v2c -c public 10.217.129.116 .1.3.6.1.4.1.890.1.5.13.1.2.1.1.2.0
SNMPv2-SMI::enterprises.890.1.5.13.1.2.1.1.2.0.1 = INTEGER: 4333
SNMPv2-SMI::enterprises.890.1.5.13.1.2.1.1.2.0.2 = INTEGER: 4397
SNMPv2-SMI::enterprises.890.1.5.13.1.2.1.1.2.0.3 = INTEGER: 4386

< 2000 RPM means fan malfunctioning and > 2000 RPM means FAN is working fine.

Fan Values can be 0 (if stopped) to > 4200 RPM if working properly.