thingspeak components makes Home Assistant communicate with the ThingSpeak API.
For now, it records exactly one entity at once, which is great for testing purposes. For long-time storage you should rely on the InfluxDB component.
You will have to create a new channel on ThingSpeak and grab your Write API Key from the “API Keys” tab of the channel you want to use.
To setup the ThingSpeak component in your installation, add the following to your
# Example configuration.yaml entry thingspeak: api_key: MY_API_KEY id: 1337 whitelist: sensor.yr_temperature