How do I identify a device? Craig Conover November 17, 2022 10:40 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. For more information please check Users & Devices. Related articles Required uuid/userID parameter What is a UserID (formerly UUID)? Can I build threaded messaging app using PubNub? Can I publish a message via database trigger? Can you handle spike usage?