The Pub/Sub Subscription doesn't contain Nest camera events.
I created a Pub/Sub Subscription in the google cloud console but is not receiving any messages.
I issued the sdm api listDevices command, but no events were generated into the topic.
If I check the Subscription in the cloud console, it contains 0 messages.
There can be a couple of reasons that may be causing this issue :
The subscription might not be created properly. You can make use of either of the options to create a subscription :
The events might not be there hence you are not seeing anything as part of the Pub/Sub.
Also, if you are using a camera make sure you are able to trigger the events that essentially comes from traits that generates events ( CameraMotion, CameraPerson, CameraSound).