Hi,
I am looking whether all the Meraki devices can be monitored with NPM (12.1)or only Wireless devices ?.
At this time there is not a built in integration with other Meraki devices besides the AP's.
You can enable direct SNMP polling for the firewalls and switches but from the people I spoke with you might find the available OID's are pretty limited compared to what you would see from most other firewalls.
SNMP Overview and Configuration - Cisco Meraki
