fixer sensor will show you the current exchange rate from Fixer.io which is using data from the European Central Bank (ECB).
To get an overview about the available currencies.
You need to create an API key. The free account is limited to only EUR as a base currency, allows 100 requests per month, and updates every hour.
To enable this sensor, add the following lines to your
# Example configuration.yaml entry sensor: - platform: fixer api_key: YOUR_API_KEY target: CHF
Your API key for Fixer.io.
Details about the API are available in the Fixer.io documentation.