How do I identify a device? Craig Conover February 16, 2021 11:29 Updated Device identity is best represented by a UUID and can be either tracked via the presence add-on feature or published as part of the message or as a standalone message. Related articles How do I set the UUID? Can I build threaded messaging app using PubNub? Can I publish a message via database trigger? Can you handle spike usage? Do you count concurrent users?