Protocol Feature Comparison

Feature	MQTT 3.1.1	MQTT 5.0	MQTT-SN 1.2	MQTT-SN 2.0	AMQP 1.0	CoAP 1.2	STOMP 1.2
QoS Support	0,1,2	0,1,2	-1,0,1,2	-1,0,1,2	At-most-once, At-least-once, Exactly-once	Confirmable, Non-confirmable	Simple
Smart Grid Suitability	Medium	High	High	Very High	High	Medium	Low
Fault Detection Speed	Medium	Fast	Fast	Very Fast	Fast	Medium	Slow
Real-time Monitoring	Good	Excellent	Excellent	Superior	Excellent	Good	Basic