For the human community to survive, agriculture is a vital industry. A number of actions have been done to increase crop yields. Nonetheless, unfavorable weather patterns and a high frequency of pest infestation cause agricultural loss. Under such circumstances, integrating cutting-edge technologies—like sophisticated sensors and the Internet of Things (IoT)—could increase agricultural output and reduce financial loss. Research from all around the world has satisfactorily shown how integrated IoT-smart sensors can be used to monitor temperature, humidity, moisture content, and other environmental factors that are vital to crop growth. Moreover, automated sensors are used to measure greenhouse gases like carbon dioxide, methane, and others.