mongoose/docs/c-api/mg_mqtt.h/mg_mqtt_publish.md

title	decl_name	symbol_kind	signature
mg_mqtt_publish()	mg_mqtt_publish	func	void mg_mqtt_publish(struct mg_connection *nc, const char *topic, uint16_t message_id, int flags, const void *data, size_t len);

Publishes a message to a given topic.