codeceptJS configuration file for BrowserStack

browserstack.codecept.conf.js

exports.config={
  helpers: {
    WebDriverIO: {
      url: process.env.BASE_URL,
      user: "<USERNAME>",
      key: "<ACCESS_KEY>",
      desiredCapabilities: {
        project: "Sample Project",
        build: "CodeceptJS",
        "browserstack.local" : true,
        os: "Windows",
        os_version: "10",
        resolution: "1920x1080",
      },
      uniqueScreenshotNames: true
    },

    Mochawesome: {
      uniqueScreenshotNames: true
    }
  },

  include: {
    "I": "./lib/steps_file.js",
    HomePage: "./lib/pages/HomePage.js",
    BannerPage: "./lib/pages/BannerPage.js"
  },

  multiple: {
    testHomePage: {
      grep: "@HomePage",
      browsers: [{"browser": "chrome", "desiredCapabilities": {name: "Home Page"}},{"browser": "firefox", "desiredCapabilities": {name: "Home Page"}}]
    },
    testBannerPage: {
      grep: "@BannerPage",
      browsers: [{"browser": "chrome", "desiredCapabilities": {name: "Banner Page"}},{"browser": "firefox", "desiredCapabilities": {name: "Banner Page"}}]
    },
    
  },

  mocha: {
    reporterOptions: {
      "mocha-junit-reporter":{
        stdout: "-",
        options: {
          mochaFile: "report/result.xml"
        }
      },
      mochawesome: {
        stdout: "-",
        options: {
          reportDir: "./report",
          reportFilename: "Regression_Test",
          reportTitle: "Regresstion Test",
          reportPageTitle: "Regresstion Test",
          ennableChart: true
        }
      }
    }
  },

  bootstrap: null,
  teardown: null,
  output: "./report",
  hooks: [],
  tests: "tests/*/*.js",
  timeout: 10000,
  name: "browserstack-home-banner-test-codeceptjs",
  smartWait: true
}

@hanikhan are the desiredCapabilities in multiple part are working when you use this config with run-multiple command? I can´t get it to work.

@pablopaul yes, this is a working configuration file. Command I am using to run this:
codeceptjs run-multiple --all -c browserstack.codecept.conf.js

you may refer a few sample repo's here:
https://github.com/DanteYu/codecept_practice
https://github.com/kinlu/Sample-CodeceptJS

How can I have all tests runs run on multiple platforms, e.g. Android, iOS, Mac, Windows? The config above doesn't work for me if I try and add devices.