mqtt_sonoff.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       "---ssid---"
#define WLAN_PASS       "---password---"

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

#define AIO_SERVER      "io.adafruit.com"
#define AIO_SERVERPORT  1883                   // use 8883 for SSL
#define AIO_USERNAME    "adafruit_mqqt-user"
#define AIO_KEY         "adafruit_io_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;

// Store the MQTT server, username, and password in flash memory.
// This is required for using the Adafruit MQTT library.
/*const char MQTT_SERVER[] PROGMEM    = AIO_SERVER;
const char MQTT_USERNAME[] PROGMEM  = AIO_USERNAME;
const char MQTT_PASSWORD[] PROGMEM  = AIO_KEY;*/

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

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

// Setup a feed called 'onoff' for subscribing to changes.
//const char ONOFF_FEED[] PROGMEM = AIO_USERNAME "/feeds/onoff";
Adafruit_MQTT_Subscribe onoffbutton = Adafruit_MQTT_Subscribe(&mqtt, AIO_USERNAME "/feeds/onoff");
Adafruit_MQTT_Publish onOff = Adafruit_MQTT_Publish(&mqtt, AIO_USERNAME "/feeds/onoff");//Manual switch

/*************************** 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();

#define RELAY 12
#define LED 13
#define SWITCH 0

boolean toggle = false;

void setup() {
  Serial.begin(115200);
  delay(10);
  pinMode(RELAY, OUTPUT);
  pinMode(LED, OUTPUT);
  digitalWrite(LED, HIGH);
  pinMode(SWITCH, INPUT_PULLUP);

  Serial.println(F("Adafruit MQTT SONOFF 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(".");
    toggle = !toggle;
    digitalWrite(LED, toggle);
  }
  Serial.println();

  Serial.println("WiFi connected");
  Serial.println("IP address: "); Serial.println(WiFi.localIP());
  digitalWrite(LED, HIGH);
  // Setup MQTT subscription for onoff feed.
  mqtt.subscribe(&onoffbutton);
}

uint32_t x=0;

uint8_t lastStateSwitch = 0;

void relay(char* onof){
  String state = String(onof);
  if((digitalRead(RELAY) != HIGH) && (state == "ON")){
    digitalWrite(RELAY, HIGH);//On relay
    digitalWrite(LED, LOW);//On led
  }else if((digitalRead(RELAY) == HIGH) && (state == "OFF")){
    digitalWrite(RELAY, LOW);//Off relay
    digitalWrite(LED, HIGH);//Off led
  }else{
    Serial.print("I got this = ");
    Serial.println(onof);
  }
}//end relay

void manualRelay(){
  if(!digitalRead(SWITCH)){
    lastStateSwitch = !lastStateSwitch;//Update switch state
    if(lastStateSwitch){
      if (! onOff.publish("ON")) {
        Serial.println(F("Failed"));
      } else {
        Serial.println(F("OK!"));
      }//end if
    }else{
      if (! onOff.publish("OFF")) {
        Serial.println(F("Failed"));
      } else {
        Serial.println(F("OK!"));
      }//end if    
    }//end if
  }//end if
}//end manualRelay

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 == &onoffbutton) {
      Serial.print(F("Got: "));
      Serial.println((char *)onoffbutton.lastread);
      relay((char *)onoffbutton.lastread);
    }
  }

  manualRelay();

  // Now we can publish stuff!


  // 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!");
}