An Iot-Enabled System For Monitoring And Alerting Cat Litter Tray Cleaning Based On Fill-Level Detection. International Journal of Environmental Sciences, [S. l.], p. 5107–5114, 2025. DOI: 10.64252/jezsxz36. Disponível em: https://theaspd.com/index.php/ijes/article/view/8400.. Acesso em: 20 sep. 2025.