import React from "react"; import SerialPort from "serialport"; import { createGlobalStyle } from "styled-components"; import Knob from "./Components/Knob"; const GlobalStyle = createGlobalStyle` html { border-style: solid; border-color: #363636; border-width: 1px; box-sizing: border-box; height: 100%; border-bottom-style: hidden; border-right-style: hidden; } `; const App = () => { const port = new SerialPort("COM5", { baudRate: 9600, autoOpen: false, }); const sendIncreaseHandler = () => { port.write("2i"); }; const sendDecreaseHandler = () => { port.write("2d"); }; const sendToggleHandler = () => { port.write("2t"); }; return (