Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you may not be able to execute some actions.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
就是官网给的串口通信上一样的教程，就是把write的内容改成了（30，40）这样的坐标，加了引号的
如果涉及代码，需要报错提示与全部代码文本，请注意不要贴代码图片