image/svg+xml Other Nodes Node Objects Request Message Node Message Listener Property Handler Message Listener Observers Observers Object Request Message Request Message User Functions uEcho (Automacic Handling) Error (False) Response Success (True) Response Request Message Error Response Response Message Error Response [Object Not Found] Error Response [Property Not Found] [Invalid Request] Write Property Data [Write Request] Read Property Data [Read Request] [Response Required] [Response Required]