MqttSubscriptionCode constants

The return value after an MQTT client attempts to subscribe to a topic, indicating the result of the behavior.

MqttSubscriptionAdministrativeAction

(152) - The connection is closed due to an administrative action.

MqttSubscriptionGrantedQoS0

(0) - The subscription is accepted and the maximum QoS sent will be QoS 0. This might be a lower QoS than was requested.

MqttSubscriptionGrantedQoS1

(1) - The subscription is accepted and the maximum QoS sent will be QoS 1. This might be a lower QoS than was requested.

MqttSubscriptionGrantedQoS2

(2) - The subscription is accepted and any received QoS will be sent to this subscription.

MqttSubscriptionIdentifiersNotSupported

(161) - The server does not support subscription identifiers; the subscription is not accepted.

MqttSubscriptionImplementationSpecificError

(131) - The subscription is valid, but the server does not accept it.

MqttSubscriptionKeepAliveTimeout

(141) - The connection is closed because no packet has been received for 1.5 times the keep alive time.

MqttSubscriptionMalformedPacket

(129) - The received packet does not conform to this specification.

MqttSubscriptionMessageRateTooHigh

(150) - The received data rate is too high.

MqttSubscriptionNotAuthorized

(135) - The client is not authorized to make this subscription.

MqttSubscriptionPacketIdentifierInUse

(145) - The specified packet identifier is already in use.

MqttSubscriptionPacketTooLarge

(149) - The packet size is greater than the maximum packet size for this client or server.

MqttSubscriptionProtocolError

(130) - An unexpected or out of order packet was received.

MqttSubscriptionQuotaExceeded

(151) - An implementation or administrative imposed limit has been exceeded.

MqttSubscriptionReceiveMaximumExceeded

(147) - The client or server has received more than receive maximum publication for which it has not sent PUBACK or PUBCOMP.

MqttSubscriptionServerBusy

(137) - The server is busy and cannot continue processing requests from this client.

MqttSubscriptionServerMoved

(157) - The server is moved, and the client should permanently change its server location.

MqttSubscriptionServerShuttingDown

(139) - The server is shutting down.

MqttSubscriptionSessionTakenOver

(142) - Another connection using the same client ID has connected causing this connection to be closed.

MqttSubscriptionSharedNotSupported

(158) - The server does not support shared subscriptions for this client.

MqttSubscriptionTopicFilterInvalid

(143) - The topic filter is correctly formed but is not allowed for this client.

MqttSubscriptionUnspecifiedError

(128) - The subscription is not accepted and the server either does not wish to reveal the reason or none of the other reason codes apply.

MqttSubscriptionWildcardNotSupported

(162) - The server does not support wildcard subscriptions; the subscription is not accepted.