Wireless sensor networks (WSN) are one of the important technologies of the 21st century. Most researchers and technical analysts believe that, in the near future, these micro-sensors will be integrated throughout anywhere of our life. In recent years, IoT and WoT gradually became a very popular and hot topic especially in the area of WSN. However, with the development of IoT, the devices that can provide information can be heterogeneous which generate different issues. In this thesis, we considered the Semantic Web associated to Ontology as a possible solution to solve some of these problems. Technologies of the Semantic Web, such as RDF language, are, for example, used to support the publication of structured data on the Web and their interoperability in the Linked (Open) Data. Besides, the 6LoWPAN (IPv6 over Low power Wireless Personal Area Networks) protocol has allowed the use of IPv6 protocol stack in the field of WSN. The use of this protocol should enable, in theory, to have all the nodes of a WSN individually "visible" from the Internet. So, relying on research works currently performed in the context of the WoT as well as the 6LoWPAN protocol, it should be possible to integrate WSN dedicated to environment and agriculture in the IoT.