Using an SNMP Custom String sensor, how can I specify "No such instance" (SNMP error # 223) as Normal/Ok?
I have a device with dry contacts that can be monitored with SNMP. When the contacts are "closed" I get an SNMP response as "High Temperature" which is pretty easy to alert off of with configuring the settings to "Response Must Not Include" to "High Temperature". The problem is that when the contacts are "open", the SNMP response is "No such instance". So is there a way to configure PRTG to show green and "Ok" when the device responds with "No such instance"?
Or is there a way to use an SNMP Custom String Lookup sensor to show "No such instance" as green and "Ok"?
Thanks for your help.