---
layout: page
title: "Let's Encrypt"
description: "Automatically manage your SSL certificate using Let's Encrypt."
date: 2018-04-18 10:55
sidebar: true
comments: false
sharing: true
footer: true
featured: false
---

<p class='note'>
You should not use this if you are also using the [DuckDNS add-on]. The DuckDNS add-on has integrated Let's Encrypt support.
</p>

Setup and manage a [Let's Encrypt](https://letsencrypt.org/) certificate. This addon will create a certificate on the first run and will auto-renew if the certificate is within 30 days of expiration. This add-on uses port 80 to verify the certificate request. You will need to stop all other add-ons that also use this port.

```json
{
  "email": "example@example.com",
  "domains": ["example.com", "mqtt.example.com", "hass.example.com"]
}
```

Configuration variables:

- **email** (*Required*): Your email address for registration on Let's Encrypt.
- **domains** (*Required*): A list of domains to create/renew the certificate.

## {% linkable_title Home Assistant configuration %}

Use the following configuration in Home Assistant to use the generated certificate:

```yaml
http:
  base_url: https://my-domain.tld:8123
  ssl_certificate: /ssl/fullchain.pem
  ssl_key: /ssl/privkey.pem
```

If you use another port such as `8123` or an SSL proxy, change the port number.

## {% linkable_title Enabling auto-renewals %}

Out of the box, the add-on will not automatically renew your certificate. In fact, it only starts, tries to get/renew your certificte, and then stops. It's up to you to manually start it again whenever your certificate comes close to expiry.

However, you can automate this process using Home Assistant.

Use this in your `automations.yaml` to attempt certificate renewal each day at midnight:

```yaml
- id: letsencrypt-renewal
  alias: "Let's Encrypt Renewal"
  trigger:
  - platform: time
    at: '00:00:00'
  action:
  - service: hassio.addon_restart
    data:
      addon: core_letsencrypt
```

[DuckDNS add-on]: /addons/duckdns/