In recent years, the studies in inter-devices communication (M2M) which is considered to be the Internet, ecosystem of the objects have accelerated in line with the developments in mobile communication technologies. This way, development of systems making human lives easier in smart environment, smart agriculture, smart grid fields with monitoring purposes which can be considered among M2M implementations is now possible. These systems can be developed with sensor node platform which can detect and communicate. Wireless Sensor Networks (WSN) consists of these sensor nodes containing simple processors, low power consuming antennas and various detectors. As the sensor networks do not require wired communication infrastructure, they can easily and inexpensively be formed with no harm to the environment. The sensor nodes have the ability to store and process data locally thanks to the software and hardware structure they have. The fact that they can get in contact with each other enables them to collaborate in performing complicated tasks along with exchanging information. As the communication means have low power consumption, it ensures that the life of the sensor nodes is long. The fact, too, that the nodes are programmable after being placed in the medium provides greater advantages. Because of the low cost and flexibility in use, the wireless sensor nodes are convenient to be used in many industrial and environmental applications. In this study, -how to develop smart environment, smart agriculture, smart grid with WSN-is analyzed. (C) 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).