Posted On: Jan 10, 2019
Beginning today you can start connecting your devices to Amazon IoT Core using Persistent Sessions that will store subscription information and pending Quality of Service (QoS) 1 messages should the devices become disconnected. When a device reconnects and resumes a Persistent Session, its subscriptions will be automatically reinstated and any stored messages will be delivered.
Persistent sessions are a standard MQTT3.1.1 feature and are initiated using the CleanSession flag when connecting. This flag is supported by Amazon IoT Device SDKs and most other MQTT clients. Persistent Sessions are available in all regions where Amazon IoT Core is available. To learn more and get started visit our Developer Guide.