Asynchronous messages are sent from an object that will not wait for a response from the receiver before continuing its tasks. Use half-arrowed lines to represent asynchronous messages. Messages are arrows that represent communication between objects. When an object is busy executing a process or waiting for a reply message, use a thin gray rectangle placed vertically on its lifeline. Use the UML object symbol to illustrate class roles, but don't list object attributes.Īctivation boxes represent the time an object needs to complete a task. If you have any other remark please feel free to correct me.Start Now Basic Sequence Diagram NotationsĬlass roles describe the way an object will behave in context. Shall this be represented as synchronous as I did or asynchronous? The server sends a post request to the beacon to start the rotation once, but it keep the state of the beacon and know that it's rotating its IDs. Is it possible to make a reference to another diagram type as the decision diagram is an activity diagram? The first question is, is it correct to draw the line between the beacon and the smartphone? Because the beacon is not sending the IDs specifically to the beacon, it's just broadcasting them over bluetooth. The server uses a logic represented in another activity diagram to decide if the user has access or not to the file and send back a response to the smartphone. When the smartphone wants to make a request, it includes the detected IDs, that the beacon is broadcasting in the request, with the requested file and send the request to the server. The beacon broadcast and change them after each interval. The server asks the beacon to start to change it's ID periodically(startIDRotation). I have a beacon which is a raspberry pi with bluetooth dongle.

It's the first time I draw an UML sequence diagram and I am not sure about few things.

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