Thanks for your reply, PhilipDAth.
These devices only have the option of connecting to an SSID, then somehow i need to allow (default is to block anything on the SSID IOTDevices) them via its mac address.
They are not capable to have pre-shared/passphrase settings set.
Needs to work like this, i guess.
1) I need to manually add their mac address somewhere locally (or Meraki picks mac up connecting to the SSID, then allow in a policy etc).
2) IOT device connects to SSID IOTDevices.
3) Merkai looks up IOT device in a mac database.
4) Merkai then allows IOT device to connect.
Any ideas??