As the world's population grows, there is pressure to switch to more sustainable agricultural methods. This, together with dwindling supplies of raw materials, shrinking amounts of farmable land, and more extreme weather events, has caused widespread anxiety about national food supplies. As a result, more farmers are turning to IoT and DA in an effort to maximise output while decreasing input costs. Smart agriculture is now being driven mostly by the IoT and data analytics, rather than by wireless sensor networks (WSN). Some of the technologies that have been merged to form the Internet of Things include wireless sensor networks for radio-frequency proof of identity, cloud computing, middleware infrastructures and customer-facing software. The advantages and disadvantages of the IoT are discussed in this article. Here, we demonstrate how smart farming is being made possible by the convergence of IoT and DA, and how an IoT ecological map may be created. In addition, we categorise future advancements by technology, applications, economic feasibility, and consumer interest.