ULAN DARI, G.; DEDY HAMDANI; IWAN SETIAWAN. Design and Build a Hazardous Gas Monitoring Device (CO, CO2, CH4) Upon Cigarette Smoke in an Enclosed Space Based on Arduino Uno and GSM SIM 900 A . Journal of Research and Technology, [S. l.], v. 8, n. 2, p. 289–302, 2023. DOI: 10.55732/jrt.v8i2.696. Disponível em: https://journal.unusida.ac.id/index.php/jrt/article/view/696. Acesso em: 5 mar. 2025.