MQTT Client

This is the MQTT client configuration used in [Action] -> [MQTT Communication].

Add

Click the [+Add] button.

[Name]

Enter the name of the MQTT Client. You can use any name.

[Host]

Enter the hostname or IP address of the MQTT broker (server).

[Port]

Enter the port number of the MQTT broker. The default port numbers are 1883 (unencrypted) or 8883 (SSL/TLS encrypted).

[Connection Timeout]

Enter the timeout duration for connecting to the MQTT broker. If this time is exceeded, the connection is considered failed.

[Client ID]

Enter the ID of the current client. Each client must use a unique ID and cannot duplicate another client’s ID.

[User Authentication]

Authenticate users using ID and password set on the MQTT broker (server).

[Username]

Enter the username. This field is only displayed when [User Authentication] is checked.

[Password]

Enter the password. This field is only displayed when [User Authentication] is checked.

[SSL/TLS Encryption]

Encrypt messages exchanged with the MQTT broker (server) using SSL certificates.

[Client Certificate]

Enter the local path to the client certificate. This field is only displayed when [SSL/TLS Encryption] is checked.

[Client Private Key]

Enter the local path to the client private key. This field is only displayed when [SSL/TLS Encryption] is checked.

[CA Certificate]

Enter the local path to the CA certificate. This field is only displayed when [SSL/TLS Encryption] is checked.

[Will Message]

Set the Will message to send to the broker when the connection with the MQTT broker (server) is abnormally terminated.

[Topic]

Enter the topic to send the Will message to. This field is only displayed when [Will Message] is checked.

[Message]

Enter the Will message. This field is only displayed when [Will Message] is checked.

[QoS]

Select the QoS (Quality of Service) for the Will message. This field is only displayed when [Will Message] is checked. QoS refers to the message service quality levels in MQTT. Higher numbers provide better reliability but consume more network resources.

• QoS 0: Does not confirm recipient’s response after sending message. Therefore, there’s a possibility that messages may not be delivered.

• QoS 1: Continues sending messages if recipient’s response doesn’t come after sending. Therefore, there’s a possibility of duplicate message transmission.

• QoS 2: Guarantees exactly-once message delivery using four-way handshaking method.

[Message Retain]

Store Will message on the MQTT broker (server). New subscribers can immediately receive the stored Will message when they connect. This field is only displayed when [Will Message] is checked.

Edit

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Delete

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