@startuml
participant backend as be
participant usb_receive as usb_r
participant command_exucutor as ce
participant Request as req
participant Response as resp

be -> usb_r : send command()
usb_r -> ce : enqueue command()
ce -> req : execute()
activate req
    req -> req : interpret_request()
    req -> req : execute_request()
    activate req
        create resp
        req -> resp : new
        activate resp
            req -> resp : execute()
            resp -> resp : set_payload()
            activate resp
                resp -> resp : set_response_payload()
                activate resp
                resp --> resp : response_payload_size
                deactivate resp
            resp --> resp : payload_size
            deactivate resp
        resp --> req : was_successful
        deactivate resp
    req --> req : was_successful
    deactivate req
req --> ce : was_successful
deactivate req
@enduml