There is no doubt that the introduction of IoT-assisted applications will become an invaluable asset to optimize farm performance. Through the data collected by sensors deployed in the fields together with other sources of information and facilities, farmers will have at their disposal a set of tools allowing them to make informed decisions on the day-to-day operation. Since 2005, a multidisciplinary team of researchers from the Albacete Research Institute of Informatics and the School of Agronomical Engineers of the University of Castilla La Mancha (UCLM) has been exploring the use of information and communication technologies in the agricultural industry. This paper reports on the main findings acquired through the deployment and experimental evaluation of IoT technologies in a vineyard. Our results also provide insight into future directions on the use of IoT technologies in precision viticulture.