The entire code for the AdaFruit Arduino library used to automate electronics

mediumTutorial.ino

/*****************
Adafruit MQTT Library ESP8266 Example


Must use ESP8266 Arduino from:
https://github.com/esp8266/Arduino


Works great with Adafruit's Huzzah ESP board & Feather
----> https://www.adafruit.com/product/2471
----> https://www.adafruit.com/products/2821


Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!


Written by Tony DiCola for Adafruit Industries.
MIT license, all text above must be included in any redistribution
******************/
#include <ESP8266WiFi.h>
#include "Adafruit_MQTT.h"
#include "Adafruit_MQTT_Client.h"
int relayInp1 = D13;


/********* WiFi Access Point ***********/


#define WLAN_SSID       "" //Wifi Name
#define WLAN_PASS       "" // Wifi Password


/********* Adafruit.io Setup ***********/


#define AIO_SERVER      "io.adafruit.com"
#define AIO_SERVERPORT  1883                   // use 8883 for SSL
#define AIO_USERNAME    "" // AdaFruit Usernmae
#define AIO_KEY         ""// AdaFruit Key


/**** Global State (you don't need to change this!) ******/


// Create an ESP8266 WiFiClient class to connect to the MQTT server.
WiFiClient client;
// or... use WiFiFlientSecure for SSL
//WiFiClientSecure client;


// Setup the MQTT client class by passing in the WiFi client and MQTT server and login details.
Adafruit_MQTT_Client mqtt(&client, AIO_SERVER, AIO_SERVERPORT, AIO_USERNAME, AIO_KEY);


/********** Feeds *************/


// Setup a feed called 'photocell' for publishing.
// Notice MQTT paths for AIO follow the form: <username>/feeds/<feedname>
//Adafruit_MQTT_Publish photocell = Adafruit_MQTT_Publish(&mqtt, AIO_USERNAME "/feeds/photocell");


// Setup a feed called 'onoff' for subscribing to changes.
Adafruit_MQTT_Subscribe lightBehindBed = Adafruit_MQTT_Subscribe(&mqtt, AIO_USERNAME "/feeds/mediumTutorial");


/********* Sketch Code ************/


// Bug workaround for Arduino 1.6.6, it seems to need a function declaration
// for some reason (only affects ESP8266, likely an arduino-builder bug).
void MQTT_connect();


void setup() {
Serial.begin(115200);
delay(10);
pinMode(relayInp1, OUTPUT);
Serial.println(F("Adafruit MQTT demo"));


// Connect to WiFi access point.
Serial.println(); Serial.println();
Serial.print("Connecting to ");
Serial.println(WLAN_SSID);


WiFi.begin(WLAN_SSID, WLAN_PASS);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println();


Serial.println("WiFi connected");
Serial.println("IP address: "); Serial.println(WiFi.localIP());


// Setup MQTT subscription for onoff feed.
mqtt.subscribe(&mediumTutorial);
}


uint32_t x=0;


void loop() {
// Ensure the connection to the MQTT server is alive (this will make the first
// connection and automatically reconnect when disconnected).  See the MQTT_connect
// function definition further below.
MQTT_connect();


// this is our 'wait for incoming subscription packets' busy subloop
// try to spend your time here


Adafruit_MQTT_Subscribe *subscription;


while ((subscription = mqtt.readSubscription(5000))) {
if (subscription == &mediumTutorial) {
Serial.print(F("Got: "));


char * temp = (char *)mediumTutorial.lastread;
Serial.println(temp);
uint16_t state = atoi(temp);
if (state == 1){
Serial.println("Switching mediumTutorial on ...");
digitalWrite(relayInp1,HIGH);
} else {
digitalWrite(relayInp1,LOW);
}
}
}
/*
// Now we can publish stuff!
Serial.print(F("\nSending photocell val "));
Serial.print(x);
Serial.print("...");
if (! photocell.publish(x++)) {
Serial.println(F("Failed"));
} else {
Serial.println(F("OK!"));
}
*/
// ping the server to keep the mqtt connection alive
// NOT required if you are publishing once every KEEPALIVE seconds
/*
if(! mqtt.ping()) {
mqtt.disconnect();
}
*/
}


// Function to connect and reconnect as necessary to the MQTT server.
// Should be called in the loop function and it will take care if connecting.
void MQTT_connect() {
int8_t ret;


// Stop if already connected.
if (mqtt.connected()) {
return;
}


Serial.print("Connecting to MQTT... ");


uint8_t retries = 3;
while ((ret = mqtt.connect()) != 0) { // connect will return 0 for connected
Serial.println(mqtt.connectErrorString(ret));
Serial.println("Retrying MQTT connection in 5 seconds...");
mqtt.disconnect();
delay(5000);  // wait 5 seconds
retries--;
if (retries == 0) {
// basically die and wait for WDT to reset me
while (1);
}
}
Serial.println("MQTT Connected!");
}