Presence, powered by PubNub DSN, keeps a finger on the pulse, delivering up-to-the-millisecond status of users and devices. Beyond simply reading who is online and offline, Presence is flexible, enabling the streaming of real-time updates as device state changes (like typing indicators, whether a door is open or closed, and other sensor information). And, act on status updates by triggering PubNub Functions whenever an event occurs.
Signal other devices and servers as each user/device connects and disconnects.
Stream real-time updates as device state changes, like typing notices, battery drain, or temperature.
Trigger PubNub Functions whenever a presence event occurs, or webhooks on any presence join/leave event.
Pass customized information about the device for its last known state.