The former is used to send a message after the service has started, and the latter is used to notify other clients about a disconnected client. Home Assistant’s MQTT integration supports so-called Birth and Last Will and Testament (LWT) messages. See also MQTT Discovery section Birth and last will messages The prefix for the discovery topic (default homeassistant) can be changed here as well. To open the MQTT options page, select Next.To change the settings, follow these steps: The WebSockets transport can be secured using TLS and optionally using user credentials or a client certificate.Ī configured client certificate will only be active if broker certificate validation is enabled. When you select websockets and click NEXT, you will be able to add a WebSockets path (default = /) and WebSockets headers (optional). You can select websockets as transport method if your MQTT broker supports it. Make sure the private key has no password set. Only a PEM encoded client certificates together with a PEM encoded private key can be uploaded. To set the client certificate and private key turn on the option Use a client certificate and click “Next” to show the controls to upload the files. ![]() With a secure broker connection it is possible to use a client certificate for authentication. If your MQTT broker supports MQTT version 5 you can set the protocol setting to 5. The MQTT protocol setting defaults to version 3.1.1. To allow a connection without the verification of the hostname, turn the Ignore broker certificate validation switch on. If the server certificate does not match the hostname then validation will fail. Click NEXT to show the control to upload the CA certificate. A custom PEM encoded CA-certificate can be uploaded. If a self-signed certificate is used, select Custom. This will allow validation against certifite CAs bundled certificates. If your broker uses a trusted certificate then choose Auto. To enable a secure the broker certificate should be validated. The keep alive setting should be minimal 15 seconds. ![]() The time in seconds between sending keep alive messages for this client. Leave this settings default if you want Home Assistant to generate a unique ID. You can set a custom MQTT client ID, this can help when debugging.
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