Axis Q3628-VE - Page 43

AXISQ36DomeCameraSeries
Thedeviceinterface
TheLastWillTestament(LWT)letsaclientprovideatestamentalongwithitscredentialswhenconnectingtothebroker.Ifthe
clientdisconnectsungracefullyatsomepointlater(maybebecausehispowersourcedied),itcanletthebrokerdeliveramessage
tootherclients.ThisLWTmessagehasthesameformasanordinarymessageandgetsroutedviathesamemechanics.
Sendmessage:Turnontosendmessages.
Usedefault:Turnofftoenteryourowndefaultmessage.
Topic:Enterthetopicforthedefaultmessage.
Payload:Enterthecontentforthedefaultmessage.
Retain:SelecttokeepthestateofclientonthisTopic
QoS:ChangetheQoSlayerforthepacketow.
MQTTpublication
Usedefaulttopicprex:Selecttousethedefaulttopicprex,thatisdenedinthedevicetopicprexintheMQTTclienttab.
Includetopicname:SelecttoincludethetopicthatdescribestheconditionintheMQTTtopic.
Includetopicnamespaces:SelecttoincludeONVIFtopicnamespacesintheMQTTtopic.
Includeserialnumber:Selecttoincludethedevice’sserialnumberintheMQTTpayload.
Addcondition:Clicktoaddacondition.
Retain:DeneswhichMQTTmessagesaresentasretained.
•None:Sendallmessagesasnon-retained.
•Property:Sendonlystatefulmessagesasretained.
•All:Sendbothstatefulandstatelessmessagesasretained.
QoS:SelectthedesiredlevelfortheMQTTpublication.
MQTTsubscriptions
Addsubscription:ClicktoaddanewMQTTsubscription.
Subscriptionlter:EntertheMQTTtopicthatyouwanttosubscribeto.
Usedevicetopicprex:AddthesubscriptionlterasprextotheMQTTtopic.
Subscriptiontype:
•Stateless:SelecttoconvertMQTTmessagesintoastatelessmessage.
•Stateful:SelecttoconvertMQTTmessagesintoacondition.Thepayloadisusedasthestate.
QoS:SelectthedesiredlevelfortheMQTTsubscription.
MQTToverlays
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