pubsubclient/_posts/2000-03-03-beginPublish.md

tag, type, name, params, returns

tag	type	name	params	returns
api	function	beginPublish	name description type topic the topic to publish to const char[] name description type length the length of the payload to be sent unsigned int name description type retained whether the message should be retained <ul> <li>false - not retained</li> <li>true - retained</li> </ul> boolean	type values boolean value description false publish failed, either connection lost or message too large value description true publish succeeded

Begins sending a publish message. The payload of the message is provided by one or more calls to write followed by a call to endPublish.