The main objective of a Smart City project should be to improve the quality life of citizens based on sustainability and energy efficiency. These projects are planned and implemented with the idea of being durable and provide a long-term service. The Universidad Politécnica de Catalunya (UPC), specifically the Escuela de Ingeniería de Telecomunicaciones y Aeroespacial de Castelldefels (EETAC), has started a project of Smart City in the vicinity of the Campus of Baix Llobregat consisting of building a network of sensors capable of covering a large area such as the campus and part of the city of Castelldefels. This project proposes a detailed study on the performance and limitations of the LoRa/LoRaWAN sensors wireless communication protocols considering analytical and experimental tools, as well as the description of the process of implementing a sensor network in a real scenario as Is the Campus of the Baix Llobregat of Castelldefels using this technology detailing the tools, software and configuration used for the correct operation of a LoRa / LoRaWAN sensor network. This document shows the results obtained in the concrete tests carried out in the laboratory together with conclusions in the context of a real scenario. The tests range from verifying the characteristics of each of the protocols to the configuration of equipment and devices to build a LoRa network that allows to store the data collected by the different sensors that make up the network, offering the opportunity to access them remotely and from any authorized device with Internet connection.