MQTT

General

Driver	Protocol	Protocol standard / version	Official protocol certification	Included in Base License Package?	Additional Licensing Requirements	License Key (Code Meter)	Operating System
MQTT	MQTT	MQTT V3.1.1	❌	❌	IO based	MQTT Client	Windows | Linux

Network

Driver	Encrypted communication to periphery device	Client Or Server / TCP or UDP	Default Port	Firewall Direction
MQTT	✔	TCP Client	1883 | 8883	outbound

Configuration Details

Driver	Recommended/technical limit of connections per driver	Multiple driver instances	Redundant network	Redundant devices	Special hardware requirements
MQTT	100	✔	✔	❌	❌

Communication

Driver	Polling	Poll on use	Single query	Unsolicited communication	Driver redundancy: Only active driver polls	Buffering
MQTT	❌	N/A	❌	✔	configurable (Subscription instead of polling)	❌

Engineering

Driver	Direct browsing of configuration/address data from connected devices	Import functionality of configuration/address data from external tools
MQTT	❌	❌

Special Telegrams

Driver	Native alarm transfer from connected devices / PLCs	Connection establishment without active address
MQTT	❌	✔

Timestamps and Synchronization

Driver	Timestamp transfer from periphery device	Time synchronization (WinCC OA to PLC)
MQTT	✔	❌