Santamaria-Granados, LuzMendoza-Moreno, Juan FranciscoMuñoz Organero, MarioChantre-Astaiza, AngelaRamirez-Gonzalez, Gustavo2021-12-222021-12-222021-12-01Santamaria-Granados, L., Mendoza-Moreno, J. F., Chantre-Astaiza, A., Munoz-Organero, M. & Ramirez-Gonzalez, G. (2021). Tourist Experiences Recommender System Based on Emotion Recognition with Wearable Data. Sensors, 21(23), 7854.1424-8220https://hdl.handle.net/10016/33830The collection of physiological data from people has been facilitated due to the mass use of cheap wearable devices. Although the accuracy is low compared to specialized healthcare devices, these can be widely applied in other contexts. This study proposes the architecture for a tourist experiences recommender system (TERS) based on the user’s emotional states who wear these devices. The issue lies in detecting emotion from Heart Rate (HR) measurements obtained from these wearables. Unlike most state-of-the-art studies, which have elicited emotions in controlled experiments and with high-accuracy sensors, this research’s challenge consisted of emotion recognition (ER) in the daily life context of users based on the gathering of HR data. Furthermore, an objective was to generate the tourist recommendation considering the emotional state of the device wearer. The method used comprises three main phases: The first was the collection of HR measurements and labeling emotions through mobile applications. The second was emotional detection using deep learning algorithms. The final phase was the design and validation of the TERS-ER. In this way, a dataset of HR measurements labeled with emotions was obtained as results. Among the different algorithms tested for ER, the hybrid model of Convolutional Neural Networks (CNN) and Long Short-Term Memory (LSTM) networks had promising results. Moreover, concerning TERS, Collaborative Filtering (CF) using CNN showed better performance.28eng© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.Atribución 3.0 EspañaCNNEmotion detectionIoTHeart rateLSTMRecommender systemTourist experienceWearableXiaomi mi bandresearch articleTelecomunicacioneshttps://doi.org/10.3390/s21237854open access785423Sensors21AR/0000028946