Siemens SIMATIC CloudConnect CC7 Series Operating Instructions Manual page 81

● TLS
– When the option is enabled, the data is transferred using the secure TLS method.
– When the option is disabled, the data is transferred unencrypted.
● TLS version
From the drop-down list, select the TLS protocol version you wish to use that is also
supported by the broker.
● Last will / testament
– When the option is enabled, the functions "Last will" and "Testament" are released.
– When the option is disabled, the use of both functions is disabled.
The functions have the following meaning:
– Last will
– Testament
● Last will topic
Enter the name of the topic that transfers the testament here.
You configure the additional parameters of the topic in the topic editor, see section
Configuring topics (Page 84).
● Testament
Here you enter the text for the message to be transferred.
Max. number of characters: 65535
● Retain- Last will
– If the option is enabled, the testament is sent with the "Retain" flag to the broker.
SIMATIC CC7
Operating Instructions, 10/2019, C79000-G8976-C503-02
The default port for encrypted transmission is 8883.
When the option is enabled, the parameter group for importing the broker certificate is
displayed, see section Certificates (Page 82).
The default port for unencrypted transmission is 1883.
If the connection between device and broker is terminated, a message can be sent to
the subscribers.
As soon as the broker (server) detects that the connection to the device (client) was
terminated, it sends a message (testament) to all subscribers that have registered for
this topic on the broker.
The testament is the content of the message that is sent to the subscribers registered
on the broker for this topic when the connection is terminated.
The testament message is saved on the broker.
The testament is enabled for permanent storage in the broker.
If the connection between the device and the broker is terminated, the broker
publishes the testament for each registered subscriber.
If a subscriber does not have a connection to the broker when the connection between
device and broker is terminated, the "testament" for the subscriber is lost. When the
Configuration
4.9 Cloud configuration
81