Design and implement a smart traffic light controlled by internet of things. Periodicals of Engineering and Natural Sciences, [S. l.], v. 9, n. 4, p. 542–548, 2021. DOI: 10.21533/pen.v9.i4.964. Disponível em: https://pen.ius.edu.ba/index.php/pen/article/view/964. Acesso em: 18 apr. 2026.