Kaspersky IoT Secure Gateway 100 forwards data to the MQTT broker over the MQTT protocol. You can read the MQTT protocol specification on the developer's website. Kaspersky IoT Secure Gateway 100 version 2.0 supports MQTT protocol version 3.1.1.
A network protocol that works on top of the TCP/IP protocol stack to exchange messages between devices on the internet of things.
A server that receives, filters, and forwards messages over the MQTT protocol.
In this Help section
Securing a connection over the MQTT protocol
Configuring data transmission over the MQTT protocol
Parameters description in the MqttPublisherSettings-0.json configuration file
Special considerations when generating names of MQTT topics
Required actions when an MQTT broker certificate is revoked