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The current low-cost solutions found in the literature share some of the following drawbacks: (1) high noise density, (2) lack of wireless synchronization, (3) lack of automatic data acquisition and data management, and (4) lack of dedicated field tests aiming to compare mode shapes from Operational Modal Analysis (OMA) with those of a digital model. To solve these problems, a recently built short-span footbridge in Barcelona is instrumented using four Low-cost Adaptable Reliable Accelerometers (LARA). In this study, the automatization of the data acquisition and management of these low-cost solutions is studied for the first time in the literature. In addition, a digital model of the bridge under study is generated in SAP2000 using the available drawings and reported characteristics of its materials. The OMA of the bridge is calculated using Frequency Domain Decomposition (FDD) and Covariance Stochastic Subspace Identification (SSI-cov) methods. Using the Modal Assurance Criterion (MAC), the mode shapes of OMA are compared with those of the digital model. Finally, the acquired eigenfrequencies of the bridge obtained with a high-precision commercial sensor (HI-INC) showed a good agreement with those obtained with LARA.<\/jats:p>","DOI":"10.3390\/s22249808","type":"journal-article","created":{"date-parts":[[2022,12,14]],"date-time":"2022-12-14T04:15:00Z","timestamp":1670991300000},"page":"9808","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":41,"title":["Operational and Analytical Modal Analysis of a Bridge Using Low-Cost Wireless Arduino-Based Accelerometers"],"prefix":"10.3390","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9010-2611","authenticated-orcid":false,"given":"Seyedmilad","family":"Komarizadehasl","sequence":"first","affiliation":[{"name":"Department of Civil and Environment Engineering, Universitat Polit\u00e8cnica de Catalunya, BarcelonaTech. C\/Jordi Girona 1-3, 08034 Barcelona, Spain"}]},{"given":"Pierre","family":"Huguenet","sequence":"additional","affiliation":[{"name":"Acoustic, Vibration and Fluid Dynamics Discipline of SENER Company, Parc de l\u2019Alba C\/Creu Casas i Sicart, 86-87, Cerdanyola del Vall\u00e8s, 08290 Barcelona, Spain"}]},{"given":"Fidel","family":"Lozano","sequence":"additional","affiliation":[{"name":"Department of Civil Engineering, Universidad de Castilla-La Mancha., Av. Camilo Jose Cela s\/n, 13071 Ciudad Real, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0741-0566","authenticated-orcid":false,"given":"Jose Antonio","family":"Lozano-Galant","sequence":"additional","affiliation":[{"name":"Department of Civil Engineering, Universidad de Castilla-La Mancha., Av. Camilo Jose Cela s\/n, 13071 Ciudad Real, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5001-2438","authenticated-orcid":false,"given":"Jose","family":"Turmo","sequence":"additional","affiliation":[{"name":"Department of Civil and Environment Engineering, Universitat Polit\u00e8cnica de Catalunya, BarcelonaTech. C\/Jordi Girona 1-3, 08034 Barcelona, Spain"}]}],"member":"1968","published-online":{"date-parts":[[2022,12,14]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"177","DOI":"10.1007\/s13349-020-00384-6","article-title":"Monitoring and evaluation of bridges: Lessons from the Polcevera Viaduct collapse in Italy","volume":"10","author":"Clemente","year":"2020","journal-title":"J. Civ. Struct. 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