In this bachelor thesis, design a robust and efficient data aggregation scheme that considers the unique characteristics of WSNs is designed. All used processes and techniques have been focused in the field of agriculture. In this thesis, a wireless sensor network with a data aggregation protocol in other to save energy is developed. MATLAB software is used to create the network and develop the protocol and its algorithms. The main goal of the work presented in this thesis has been to provide possible improvements for aggregation data and energy consumption in WSN applications. To achieve that, different existing techniques and algorithms are studied to devise a protocol by using some techniques, improving another techniques and implementing new concepts.