wifibutton-mqtt.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"

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

#define WLAN_SSID       "YOURSSID"
#define WLAN_PASS       "YOURPASS"

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

#define AIO_SERVER      "YOURMQTTBROKER"
#define AIO_SERVERPORT  1883                   // use 8883 for SSL
#define AIO_USERNAME    "MQTTBROKERUSERNAME"
#define AIO_KEY         "MQTTBROKERPASSWORD"

/************ 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 button = Adafruit_MQTT_Publish(&mqtt, "wifibutton");

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


// buttonpin
int buttonpin = 12;


int DEBUG = 0;

/*************************** 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() {
  if (DEBUG) Serial.begin(115200);
  delay(10);

  if (DEBUG) Serial.println(F("Adafruit MQTT demo"));

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

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

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

  pinMode(buttonpin, INPUT_PULLUP);
  

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

uint32_t x=0;

//boolean lastbuttonstate;
int buttonstate = 0;
unsigned long lastpressed = 0; 
unsigned long lastsent = 0; 
const long pressdelay = 400;
const long ignoredepress = 100;
int needsoff = 1;

const long senddelay = 250;


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();


  if (digitalRead(buttonpin) == LOW) {
    if (millis() - lastpressed >= pressdelay) {
      lastpressed = millis();
      buttonstate = 1;
    }
    
    // Now we can publish stuff!
    lastsent = millis();
    if (DEBUG) Serial.print(F("\nSending buttonpress "));
    if (DEBUG) Serial.print("...");
    if (! button.publish("ON")) {
      if (DEBUG) Serial.println(F("Failed"));
    } else {
      if (DEBUG) Serial.println(F("OK!"));
    }

    needsoff = 1;

  } else {
    if ((millis() - lastpressed >= ignoredepress) && (needsoff)) {
      buttonstate = 0;
      
      if (! button.publish("OFF")) {
        if (DEBUG) Serial.println(F("Failed"));
      } else {
        if (DEBUG) Serial.println(F("OK!"));
      }

      needsoff = 0;
    }
  }

if (0){
  if (millis() - lastsent >= senddelay) {
    lastsent = millis();
    if (DEBUG) Serial.print(F("\nreSending buttonpress "));
    if (DEBUG) Serial.print(buttonstate);
    if (DEBUG) Serial.print("...");
    if (buttonstate) {
      if (! button.publish("ON")) {
        if (DEBUG) Serial.println(F("Failed"));
      } else {
        if (DEBUG) Serial.println(F("OK!"));
      }
    } else {
      if (! button.publish("OFF")) {
        if (DEBUG) Serial.println(F("Failed"));
      } else {
        if (DEBUG) 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;
  }

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

  uint8_t retries = 3;
  while ((ret = mqtt.connect()) != 0) { // connect will return 0 for connected
       if (DEBUG) Serial.println(mqtt.connectErrorString(ret));
       if (DEBUG) 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);
       }
  }
  if (DEBUG) Serial.println("MQTT Connected!");
}