The Certificate Expiry integration fetches the certificate from a configured host and displays its expiration in a timestamp sensor. The sensor checks and updates the certificate information for the configured host every 12 hours.
Adding Certificate Expiry to your Home Assistant instance can be done via the user interface, by using this My button:
If the above My button doesn’t work, you can also perform the following steps manually:
Browse to your Home Assistant instance.
In the bottom right corner, select the Add Integration button.
From the list, select Certificate Expiry.
Follow the instructions on screen to complete the setup.
The Certificate Expiry entities provide extra attributes to represent the state of the certificate.
||If the certificate is able to be validated:
||A human-readable error description if the certificate is considered invalid, “None” otherwise.|