Getting started

This guide will setup your first application. The first step is to install the @angular/cli in the right version.

npx @angular/cli@v17-lts new --style=less --standalone=false

Second, navigate to the folder and add the @c8y/websdk package to your Angular application:

ng add @c8y/websdk

The CLI will prompt you in two steps for the version and the base template. Afterwards your application is set and you can start your first development server in step 3.

Step 1: Select the version

? Which base version do you want to scaffold from? (Use arrow keys)
> 1019.0.X
> 1019.X.0
> other

In the first step, the base scaffolding version must be selected. The interface will provide the latest available release. Additionally a version can be manually entered by selecting the other option. If you do not know which version to select, we recommend to use the latest.

Step 2: Select the base project to start from

? Which base project do you want to scaffold from?
  administration
  application
  cockpit
  devicemanagement
  hybrid
  tutorial
  widget-plugin
  package-blueprint

In step two, the base project to scaffold from must be selected. You can select any of the default Cumulocity applications to reuse the functions provided there. In alternative, you could start a blank application by selecting the “application” project.

Step 3: Start the local development server

Now you can start the application by running the npm start command. By default, the application will proxy to the Cumulocity IoT cloud platform, however, you can proxy to a different application using the -u flag. For example:

npm start -- -u http://mytenant.acme.iot

or

 ng serve <appName> -u http://mytenant.acme.iot

When you start the command the application begins to compile. After it is compiled, you can navigate to http://localhost:4200/apps/<<your-app-name>>/ and login to your tenant.

You are now setup. Any changes you make to your local files will lead to recompiling. After a refresh you will see your changes.

Create your first custom component

After creating the empty bootstrapping application you might want to start with your first content. To do so, add a new component in the src/app to your project and save it as hello.component.ts:

import { Component } from '@angular/core';

@Component({
  selector: 'app-hello',
  template: `
    <c8y-title>Hello World</c8y-title>
    <p>My first content.</p>
  `
})
export class HelloComponent {}

To hook the new component into the application, you must declare the new component and add it to a route in the app.module.ts. In the following example we extended the application project, which gives you a very clear application frame.

import { NgModule } from '@angular/core';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { RouterModule as ngRouterModule } from '@angular/router';
import { CoreModule, BootstrapComponent } from '@c8y/ngx-components';
import { HelloComponent } from './hello.component';

@NgModule({
  imports: [
    BrowserAnimationsModule,
    ngRouterModule.forRoot(
      [{ path: '', component: HelloComponent }], // hook the route here
      { enableTracing: false, useHash: true }
    ),
    CoreModule.forRoot()
  ],
  bootstrap: [BootstrapComponent],
  declarations: [HelloComponent] // add deceleration here
})
export class AppModule {}

If you start this application and login, you will see an application similar to the following screenshot.

The application is using a customized router from the Web SDK and the CoreModule. The CoreModule contains all the necessary components, directives, pipes and services that allow you to extend the application even further. But first we will release the application and deploy it.

Deploying your application

The CLI provides a command to deploy the application, you can simply run the command c8ycli deploy and the current application will be deployed. However, before deploying your application you need to build it, you can run c8ycli build to do so.

For deployment you need an application role, username, password and a tenant. You can also run it by providing this information as parameters. Use the following code to build and deploy the application without prompting:

ng deploy -- -u http://yourtenant.cumulocity.com -T t12345 -U acme -P "*******"

In this example we use the custom deploy command added to Angular. You need to provide the option -T (tenant), -U (user) and -P (password) to authenticate on your tenant. The deploy command also accepts environment variables if you do not want to store them, prefixed with C8Y_. So for example C8Y_USER for the -U flag.

Next steps

• Refer to the Cumulocity IoT Codex for more information on developing applications in the Cumulocity IoT environment. Moreover find various related tutorials in the Tech Community.