update example.

hirotakaster · Oct 10, 2016 · 91b00fc · 91b00fc
1 parent 0f5e318
commit 91b00fc
Showing 1 changed file with 4 additions and 4 deletions.
diff --git a/firmware/examples/mqttqostest.ino b/firmware/examples/mqttqostest.ino
@@ -52,18 +52,18 @@ void setup() {
     // connect to the server
     client.connect("sparkclient");
 
-    // add qos callback
+    // add qos callback. If don't add qoscallback, ACK message from MQTT server is ignored.
     client.addQosCallback(qoscallback);
 
     // publish/subscribe
     if (client.isConnected()) {
-        // get messageid parameter at 4.
-
+        // can use messageid parameter at 4.
         uint16_t messageid;
-        client.publish("/outTopic", "hello world QOS1(message is NULL)", MQTT::QOS1);
         client.publish("/outTopic", "hello world QOS1", MQTT::QOS1, &messageid);
         Serial.println(messageid);
 
+        client.publish("/outTopic", "hello world QOS1(message is NULL)", MQTT::QOS1);
+
         client.publish("/outTopic", "hello world QOS2", MQTT::QOS2, &messageid);
         Serial.println(messageid);