This inheritance list is sorted roughly, but not completely, alphabetically:

[detail level 12]

▼CMQTT::Message	Abstract base class
CMQTT::Connect	Message sent when connecting to a broker
CMQTT::ConnectAck	Response to Connect
CMQTT::Disconnect	Disconnect from the broker
CMQTT::Ping	Ping the broker
CMQTT::PingResp	Response to Ping
CMQTT::Publish	Publish a payload to a topic
CMQTT::PublishAck	Response to Publish when qos == 1
CMQTT::PublishComp	Response to PublishRel
CMQTT::PublishRec	First response to Publish when qos == 2
CMQTT::PublishRel	Response to PublishRec
CMQTT::Subscribe	Subscribe to one or more topics
CMQTT::SubscribeAck	Response to Subscribe
CMQTT::Unsubscribe	Unsubscribe from one or more topics
CMQTT::UnsubscribeAck	Response to Unsubscribe
CPubSubClient	Main do-everything class that sketches will use