Basic Spark.publish() usage

publish.cpp

// The most basic event, without data.
Spark.publish("motion-detected");

// Some events require additional data.
Spark.publish("temperature", "19 F");  

// You can set a TTL to persist data in the cloud...
Spark.publish("lake-depth/1", "28", 21600);

// ...and make events private for secure applications.
Spark.publish("front-door-unlocked", NULL, 60, PRIVATE);