Synchronous Commands

Synchronous commands, also known as “request-reply” commands, are single HTTP transactions with an initial request followed by a response. The request will contain whatever information is necessary to complete the command, such as meter identifiers or dates. The reply will contain any results generated by the command. It could be a simple acknowledgement or a complex data structure. In general, it will return quickly as HTTP transactions will fail if the response does not arrive quickly enough.