4bnode/add-serialport.js

4bnode is a CLI-powered backend development platform with a built-in visual dashboard to generate, manage, and test Node.js/Express APIs faster.

#!/usr/bin/env node

import path from "path";
import { input } from "@inquirer/prompts";
import { getProjectRoot } from "./lib/project.js";
import { updateEnvFile } from "./lib/env.js";
import { addImport, insertBeforeListen } from "./lib/indexFile.js";
import {
  showHeader,
  showTaskDone,
  showError,
  showFileAction,
  installDeps,
} from "./lib/ui.js";

async function main() {
  showHeader("add-serialport", "Add serial port communication");

  const serialPortPath = await input({
    message: "Serial port path:",
    default: process.platform === "win32" ? "COM3" : "/dev/tty-usbserial1",
  });

  const baudRate = await input({
    message: "Baud rate:",
    default: "9600",
    validate: (v) => (!isNaN(parseInt(v, 10)) ? true : "Enter a valid number."),
  });

  console.log();

  addImport("import { SerialPort } from 'serialport';");
  addImport("import { ReadlineParser } from '@serialport/parser-readline';");
  showFileAction("updated", "index.js");

  const serialportSetup = `
try {
  const serialPort = new SerialPort({
    baudRate: parseInt(process.env.BAUDRATE, 10) || ${baudRate},
    path: process.env.SERIALPORT_PATH || '${serialPortPath}',
  });

  const parser = serialPort.pipe(new ReadlineParser({ delimiter: "\\r\\n" }));

  parser.on("data", async (data) => {
    console.log('Received data:', data);
  });

  serialPort.on("error", function (err) {
    console.error("SerialPort Error: ", err.message);
  });
} catch (error) {
  console.error("Error initializing SerialPort:", error);
}`;

  insertBeforeListen(serialportSetup);

  const projectRoot = getProjectRoot();
  updateEnvFile(path.join(projectRoot, ".env"), "SERIALPORT_PATH", serialPortPath);
  updateEnvFile(path.join(projectRoot, ".env"), "BAUDRATE", baudRate);
  showFileAction("updated", ".env");

  await installDeps(["serialport", "@serialport/parser-readline"]);

  showTaskDone("SerialPort integration complete", [
    `Path: ${serialPortPath}`,
    `Baud rate: ${baudRate}`,
    "Data logged to console on receive",
  ]);
}

main().catch((err) => {
  if (err.name === "ExitPromptError") process.exit(0);
  showError(err.message);
  process.exit(1);
});