CHAPTER 6 ■ IOT PATTERNS: REMOTE CONTROL
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Listing 6-15. Code for Standard Arduino Functions
void setup()
{
// Initialize serial port
Serial.begin(9600);
// Connect Arduino to internet
connectToInternet();
// Set LED pin mode
pinMode(ledPin, OUTPUT);
//Connect MQTT Broker
Serial.println("[INFO] Connecting to MQTT Broker");
if (pubSubClient.connect("arduinoClient"))
{
Serial.println("[INFO] Connection to MQTT Broker Successful");
pubSubClient.subscribe(topic);
}
else
{
Serial.println("[INFO] Connection to MQTT Broker Failed");
}
}
void loop()
{
// Wait for messages from MQTT broker
pubSubClient.loop();
}
Your Arduino code is now complete.
The Final Product
To test the application, verify and upload the Arduino code as discussed in Chapter 1 .
Once the code has been uploaded, open the Serial Monitor window. You will start seeing
log messages similar to ones shown in Figure  6-22 .