                     +---------+
                     | sensors |
                     +---------+
                          |
                          v
  +---------+       +==========+       +-----------+
  | control |<------#  broker  #------>| dashboard |
  +---------+       +==========+       +-----------+
                          |
                          v
                     +---------+
                     | archive |
                     +---------+
