https://blog.gongquiz.com/2024/01/30/%eb%a9%b4%ed%97%88-%eb%8c%80%ec%97%ad%ec%9d%84-%ec%82%ac%ec%9a%a9%ed%95%98%eb%8a%94-%ed%86%b5%ec%8b%a0-%ea%b8%b0%ec%88%a0%ec%9d%80-iot%ec%a7%80%ec%8b%9d%eb%8a%a5%eb%a0%a5%ea%b2%80%ec%a0%95-2019/