voltage monitring with nagios

RouterOS Scripting
1

I want that nagios give me a warning if the voltage below the 15 volt

define service{
use generic-service ; Inherit values from a template
host_name 10.97.213.10
service_description SPANNING
check_command check_snmp!-C public -o 1.3.6.1.4.1.14988.1.1.3.8.0
}

This is my working config in nagios but wihout warnings

What are the parameters that i must config?

Thanks for repley

2

i have it found

define service{
use generic-service ; Inherit values from a template
host_name 192.168.122.12
service_description VOLTAGE
check_command check_snmp!-C public -o 1.3.6.1.4.1.14988.1.1.3.8.0
}

I hope this is helpfull