We have a lot of older Cisco 2602 AP and we need to connect some Coffe Machine to the Network. (this is not a Joke) if we now configure the correct SSID on the Cisco AP (even with open security) the Cisco AP is not Connecting to the Meraki AP.
If your willing to post the config of your 2602, which I'm assuming you have configured in autonomous mode as a work-group bridge based on the lovely image you have above, I can take a peek (no promises since it's been a while).
Were you able to get this to work ? I have the same need, and am able to get the WGB to associate fine. And it can ping the ethernet device fine (same subnet as the WGB & SSID/VLAN). But no traffic for it is being passed across the association.