Enumeration of available QoS types.
- atLeastOnce → const MqttQos
QOS Level 1 - Message is guaranteed delivery. It will be delivered at least one time, but may be delivered more than once if network errors occur.
- atMostOnce → const MqttQos
QOS Level 0 - Message is not guaranteed delivery. No retries are made to ensure delivery is successful.
- exactlyOnce → const MqttQos
QOS Level 2 - Message will be delivered once, and only once. Message will be retried until it is successfully sent.
- failure → const MqttQos
Failure indication This is a QOS value of 128, used in a sub ack message to indicate failure to subscribe to a topic
- reserved1 → const MqttQos
Reserved by the MQTT Spec. Currently unused from here on until the fail indicator below
→ const List<
A constant List of the values in this enum, in order of their declaration.