MQTT
connect
data MQTT
disconnect
reconnect
onReconnect
resubscribe
data MQTTConfig
defaultConfig
cHost
cPort
cClean
cWill
cUsername
cPassword
cKeepAlive
cClientID
cConnectTimeout
cReconnPeriod
cLogger
subscribe
unsubscribe
publish
Message
send
addHandler
removeHandler
awaitMsg
awaitMsg'