Adafruit_Example.ino

#include <ESP8266WiFi.h>
#include "Adafruit_MQTT.h"
#include "Adafruit_MQTT_Client.h"

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

#define WLAN_SSID       "Your_SSID"
#define WLAN_PASS       "Your_Password"

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

#define AIO_SERVER      "io.adafruit.com"
#define AIO_SERVERPORT  1883            
#define AIO_USERNAME    "xxxxxxxxxx"
#define AIO_KEY         "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"


WiFiClient client;

Adafruit_MQTT_Client mqtt(&client, AIO_SERVER, AIO_SERVERPORT, AIO_USERNAME, AIO_KEY);

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

Adafruit_MQTT_Publish IRsensor = Adafruit_MQTT_Publish(&mqtt, AIO_USERNAME "/feeds/Analog");


Adafruit_MQTT_Subscribe LEDcontrol = Adafruit_MQTT_Subscribe(&mqtt, AIO_USERNAME "/feeds/BUILTIN");

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

void MQTT_connect();

void setup() {
  Serial.begin(115200);
  delay(10);

  pinMode(D0,OUTPUT);
  // 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());
  mqtt.subscribe(&LEDcontrol);
}

int x=0;

void loop() {

  MQTT_connect();

  Adafruit_MQTT_Subscribe *subscription;
  while ((subscription = mqtt.readSubscription(5000))) {
    if (subscription == &LEDcontrol) {
      Serial.print(F("Got: "));
      Serial.println((char *)LEDcontrol.lastread);
      int Light_State = atoi((char *)LEDcontrol.lastread);
      digitalWrite(D0, Light_State);
    }
  }

  x=analogRead(A0);
  Serial.print(F("\nSending analog val "));
  Serial.print(x);
  Serial.print("...");
  if (! IRsensor.publish(x)) {
    Serial.println(F("Failed"));
  } else {
    Serial.println(F("OK!"));
  }

}

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!");
}