Maui Monitor Arduino Code

31 Dec 2018

Here's my contribution to the code for Episode 367: Most Useless IoT Device Ever - Part 2 It's ugly, but it works!

//element14 Presents IoT Rock Phase II
//Maui airport monitor by Matthew Eargle
//https://airbornesurfer.com
//Completely useless function to tell us when someone arrives in a place we aren't
//Especially when that place is somewhere we'd rather be
//Based on Adafruit GMailbox Example Code
//https://learn.adafruit.com/gmailbox
//Please support open source developers--we're all in this together!

/************************** Configuration ***********************************/

// edit the config.h tab and enter your Adafruit IO credentials
// and any additional configuration needed for WiFi, cellular,
// or ethernet clients.
#include "config.h"

/************************** Start Code *************************************/

// set up feed
AdafruitIO_Feed *gmail_feed = io.feed("IoT Rock");

void setup() {

  // initialize digital pin LED_BUILTIN as an output.
  pinMode(LED_BUILTIN, OUTPUT);
  
  // start the serial connection
  Serial.begin(115200);

  // wait for serial monitor to open
  while(! Serial);

  Serial.print("Maui Monitor");

  // connect to io.adafruit.com
  Serial.print("Connecting to Adafruit IO");
  io.connect();

  // set up a message handler for the monitor feed.
  // the handleMessage function (defined below)
  // will be called whenever a message is
  // received from adafruit io.
  gmail_feed->onMessage(handleMessage);

  // wait for a connection
  while(io.status() < AIO_CONNECTED) {
    Serial.print(".");
    delay(500);
  }

  // connection established
  Serial.println();
  Serial.println(io.statusText());
  gmail_feed->get();

  // write led indicator off
  digitalWrite(LED_BUILTIN, LOW);

}

void loop() {
  
  io.run();
  digitalWrite(LED_BUILTIN, LOW);
}

// this function is called whenever a 'gmail' message
// is received from Adafruit IO. it was attached to
// the gmail feed in the setup() function above.
void handleMessage(AdafruitIO_Data *data) {

  Serial.println("Someone Landed!");
  digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);                       // wait for a second
  digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);
  digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);                       // wait for a second
  digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);
  digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);                       // wait for a second
  digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);
  digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);                       // wait for a second
  digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);
  digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);                       // wait for a second
  digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);
}

You're also going to need a file named config.h in the same folder as this Arduino sketch. The config file contains the following:

/************************ Adafruit IO Config *******************************/

// visit io.adafruit.com if you need to create an account,
// or if you need your Adafruit IO key.
#define IO_USERNAME    "AdafruitIOUsername"
#define IO_KEY         "AdafruitIOAPIKey"

/******************************* WIFI **************************************/

// the AdafruitIO_WiFi client will work with the following boards:
//   - HUZZAH ESP8266 Breakout -> https://www.adafruit.com/products/2471
//   - Feather HUZZAH ESP8266 -> https://www.adafruit.com/products/2821
//   - Feather HUZZAH ESP32 -> https://www.adafruit.com/product/3405
//   - Feather M0 WiFi -> https://www.adafruit.com/products/3010
//   - Feather WICED -> https://www.adafruit.com/products/3056

#define WIFI_SSID       "SSID"
#define WIFI_PASS       "password"

// comment out the following two lines if you are using fona or ethernet
#include "AdafruitIO_WiFi.h"
AdafruitIO_WiFi io(IO_USERNAME, IO_KEY, WIFI_SSID, WIFI_PASS);