DOP-3S HMI MQTT Advanced Functions Application Guide

This document describes the application of advanced MQTT functions using Delta HMI models DOP-3S10S3E2 and DOP-3S07S3E2, covering dynamic topics, timestamps, and top-level use of "d" in a publish/subscribe architecture. It provides a hardware/software configuration guide and references a custom JSON format for interoperability across different MQTT platforms.