l class="section"><li class="chapter-item expanded "><a href="../../chapter_9/9.1.html"><strong aria-hidden="true">9.1.</strong> Introduction to Remote Control</a></li><li class="chapter-item expanded "><a href="../../chapter_9/9.2/index.html"><strong aria-hidden="true">9.2.</strong> Cloud Data Communication Protocols</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../chapter_9/9.2/9.2.1.html"><strong aria-hidden="true">9.2.1.</strong> MQTT Introduction</a></li><li class="chap