Axis P47-PLVE Series User Manual page 40

AXIS P47-PLVE series
The web interface
ALPN
ALPN is a TLS/SSL extension that allows for the selection of an application protocol during the handshake phase of the connection
between the client and server. This is used to enable MQTT traffic over the same port that is used for other protocols, such as HTTP.
In some cases, there might not be a dedicated port open for MQTT communication. A solution in such cases is to use ALPN to
negotiate the use of MQTT as the application protocol on a standard port, allowed by the firewalls.
MQTT client
Connect: Turn on or off the MQTT client.
Status: Shows the current status of the MQTT client.
Broker
Host: Enter the hostname or IP address of the MQTT server.
Protocol: Select which protocol to use.
Port: Enter the port number.
• 1883 is the default value for MQTT over TCP
• 8883 is the default value for MQTT over SSL
• 80 is the default value for MQTT over WebSocket
• 443 is the default value for MQTT over WebSocket Secure
ALPN protocol: Enter the ALPN protocol name provided by your MQTT broker provider. This is only applicable with MQTT over SSL
and MQTT over WebSocket Secure.
Username: Enter the username that the client will use to access the server.
Password: Enter a password for the username.
Client ID: Enter a client ID. The client identifier is sent to the server when the client connects to it.
Clean session: Controls the behavior at connection and disconnection time. When selected, the state information is discarded
at connect and disconnect.
HTTP proxy: A URL with a maximum length of 255 bytes. You can leave the field empty if you don't want to use an HTTP proxy.
HTTPS proxy: A URL with a maximum length of 255 bytes. You can leave the field empty if you don't want to use an HTTPS proxy.
Keep alive interval: Enables the client to detect when the server is no longer available without having to wait for the long
TCP/IP timeout.
Timeout: The time interval in seconds to allow a connect to complete. Default value: 60
Device topic prefix: Used in the default values for the topic in the connect message and LWT message on the MQTT client tab,
and in the publication conditions on the MQTT publication tab.
Reconnect automatically: Specifies whether the client should reconnect automatically after a disconnect.
Connect message
Specifies if a message should be sent out when a connection is established.
Send message: Turn on to send messages.
Use default: Turn off to enter your own default message.
Topic: Enter the topic for the default message.
Payload: Enter the content for the default message.
Retain: Select to keep the state of client on this Topic
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