google.md

Google Calendar API

see https://developers.google.com/calendar/caldav/v2/guide

• SignIn on https://console.developers.google.com/projectselector/apis/credentials
• Click on create a project

Configure consent screen

• UserType external

• for Application Name use ioBroker.webCal
• choose your email adress for support and developer contact

• click save three times
• click back to dasboard
• Set publishing to production

Click on "+ create Credentials" and add new OAuth Client ID

• type Webapplication
• name ioBroker.webCal
• Authorized redirect URIs: https://developers.google.com/oauthplayground
• click on "Create" and download JSON in next screen

• Click Library on the side menu
• search for "webdav" and click on result tile

• Click Enable to enable the calDAV API.

Open OAuth 2.0 Playground

• click OAuth 2.0 Configuration button in the Right top corner.
• Select Use your own OAuth credentials in the bottom and provide the Client ID and Client Secret values from JSON file.

• click close

• Under Step 1 on left side search for Google Calendar and click on
  https://www.googleapis.com/auth/calendar and https://www.googleapis.com/auth/calendar.events
  

• click on Authorize API's

  • now you have to accept and trust yourself.... (perhaps you have to click on advanced)

  • 

    

• Click Button Exchange authorization code for tokens on Step 2
  

• here we need the refresh-token

Use the following settings in ioBroker

• auth Methold = google
• Secret = Client Secret (from JSON file)
• refresh token = which you get from above
• client ID = your clientID (from JSON file)