pubsubclient/_posts/2000-04-01-subscribe.md

tag	type	name	params	returns
api	function	subscribe	name description type topic the topic to subscribe to const char[] name optional description type qos true the qos to subscribe at int: 0 or 1 only	type values boolean value description false sending the subscribe failed, either connection lost or message too large value description true sending the subscribe succeeded

Subscribes to messages published to the specified topic.