https://blog.gongquiz.com/2022/09/19/10ghz%ec%9d%98-%ec%a7%81%ec%a0%91%ed%99%95%ec%82%b0-%ec%8b%9c%ec%8a%a4%ed%85%9c%ec%9d%b4-20kbaud%ec%9d%98-%eb%8d%b0%ec%9d%b4%ed%84%b0-%ec%a0%84%ec%86%a1%ec%97%90-%ec%82%ac%ec%9a%a9%eb%90%9c-2/