SmartApp Instance to create a virtual device

smartapp.js

'use strict';
/*
  * This demo SmartApp can be registered
  * as a SmartApp Automation or SmartApp
  * Connector.
  *
  * Either way, a virtual switch will be
  * created and will respond to device
  * commands.
  * */
const { SmartApp } = require('@smartthings/smartapp');

const deviceSmartApp = new SmartApp()
  .appId('demo')
  .disableCustomDisplayName(true)
  .permissions(['w:devices:*', 'r:locations:*', 'i:deviceprofiles:*'])
  .page('mainPage', (ctx, page, configData) => {
    page.section('Device label:', section => {
      section
        .textSetting('deviceLabel')
        .description('')
        .name('Set label')
    })
  })
  .installed(async (ctx, updateData) => {
    // Get device label from Input
    let deviceLabel = ctx.config.deviceLabel[0].stringConfig.value;

    // Device request payload
    let deviceOpt = {
      label: deviceLabel,
      locationId: ctx.locationId,
      app: {
        profileId: '',
        installedAppId: updateData.installedApp.installedAppId
      }
    };

    let deviceReq = await ctx.api.devices.create(deviceOpt)
  }).deviceCommandHandler(async (ctx, cmdData) => {
    let event = [];
    let statusRes = {
      component: cmdData.commands[0].componentId,
      capability: cmdData.commands[0].capability,
      attribute: 'switch',
      value: cmdData.commands[0].command === 'on' ? 'on' : 'off'
    };

    event.push(statusRes);
    await ctx.api.devices.sendEvents(cmdData.deviceId, event); // send device response
  }).uninstalled(async (ctx, uninstallData) => {
    await ctx.api.devices.delete(ctx.config.deviceId); // delete device
  })

module.exports = deviceSmartApp;

To publish a device profile, run the following command at the SmartThings CLI:

smartthings deviceprofiles:publish <device_profile_id>