├── .gitattributes
└── code_for_workshop_.ino


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1 | # Auto detect text files and perform LF normalization
2 | * text=auto
3 | 


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/code_for_workshop_.ino:
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  1 | /***************************************************
  2 |   This is the code for the project
  3 |   "Google Assistant Controllled Appliances"
  4 |   using a ESP8266 12e board
  5 | 
  6 |   Original code is from
  7 |   Adafruit MQTT Library ESP8266 Example
  8 |   Code edited by
  9 |   Sachin Soni
 10 |   http://www.techiesms.com
 11 |  ****************************************************/
 12 | 
 13 | // Necessary Library Declarations
 14 | #include <ESP8266WiFi.h>
 15 | #include "Adafruit_MQTT.h"
 16 | #include "Adafruit_MQTT_Client.h"
 17 | 
 18 | //What does a libray means?
 19 | //Library contains the detailed code of the functions used in the code.
 20 | 
 21 | // Defining Pin for our Relay
 22 | #define relay D1
 23 | 
 24 | /************************* WiFi Access Point *********************************/
 25 | 
 26 | #define WLAN_SSID       "SmS"
 27 | #define WLAN_PASS       "sms123458956"
 28 | /************************* Adafruit.io Setup *********************************/
 29 | //This Will remain as it is for all adafruit accounts
 30 | #define AIO_SERVER      "io.adafruit.com"
 31 | #define AIO_SERVERPORT  1883                   // use 8883 for SSL
 32 | 
 33 | //Here you have to enter the details of your Adafruit IO account.
 34 | #define AIO_USERNAME    "techiesms"
 35 | #define AIO_KEY         "912b30c900574034a653f41e2b4df838"
 36 | 
 37 | /************ Global State (you don't need to change this!) ******************/
 38 | 
 39 | // Create an ESP8266 WiFiClient class to connect to the MQTT server.
 40 | WiFiClient client;
 41 | // or... use WiFiFlientSecure for SSL
 42 | //WiFiClientSecure client;
 43 | 
 44 | // Setup the MQTT client class by passing in the WiFi client and MQTT server and login details.
 45 | Adafruit_MQTT_Client mqtt(&client, AIO_SERVER, AIO_SERVERPORT, AIO_USERNAME, AIO_KEY);
 46 | 
 47 | /****************************** Feeds ***************************************/
 48 | 
 49 | // Setup a feed called 'onoffbutton' for subscribing to changes.
 50 | //Here you need to add the feed name of the button you have created in your adafruit account.
 51 | Adafruit_MQTT_Subscribe onoffbutton = Adafruit_MQTT_Subscribe(&mqtt, AIO_USERNAME "/feeds/relay1");
 52 | 
 53 | /*************************** Sketch Code ************************************/
 54 | 
 55 | // Bug workaround for Arduino 1.6.6, it seems to need a function declaration
 56 | // for some reason (only affects ESP8266, likely an arduino-builder bug).
 57 | void MQTT_connect();
 58 | 
 59 | //This is a setup function in which the initial settings are decalred
 60 | //and this function will run only once when the code starts running
 61 | void setup() {
 62 |   Serial.begin(115200);//Turning ON the serial communication to view response in serial monitor 
 63 |   delay(10);
 64 | 
 65 |   Serial.println(F("Adafruit MQTT demo"));
 66 | 
 67 |   // Connect to WiFi access point.
 68 |   Serial.println(); Serial.println();
 69 |   Serial.print("Connecting to ");
 70 |   Serial.println(WLAN_SSID);
 71 | 
 72 |   WiFi.begin(WLAN_SSID, WLAN_PASS);
 73 |   while (WiFi.status() != WL_CONNECTED) {
 74 |     delay(500);
 75 |     Serial.print(".");
 76 |   }
 77 |   Serial.println();
 78 | 
 79 |   Serial.println("WiFi connected");
 80 |   Serial.println("IP address: "); Serial.println(WiFi.localIP());
 81 | 
 82 |    //Defining our relay pin as an Output 
 83 |   pinMode(relay, OUTPUT);
 84 | 
 85 |   // Setup MQTT subscription for onoff feed.
 86 |   mqtt.subscribe(&onoffbutton);
 87 | }
 88 | 
 89 | uint32_t x=0;
 90 | 
 91 | void loop() {
 92 |   // Ensure the connection to the MQTT server is alive (this will make the first
 93 |   // connection and automatically reconnect when disconnected).  See the MQTT_connect
 94 |   // function definition further below.
 95 |   MQTT_connect();
 96 | 
 97 |   // this is our 'wait for incoming subscription packets' busy subloop
 98 |   // try to spend your time here
 99 | 
100 |   Adafruit_MQTT_Subscribe *subscription;
101 |   while ((subscription = mqtt.readSubscription(5000))) {
102 |     if (subscription == &onoffbutton) {
103 |       Serial.print(F("Got: "));
104 |       Serial.println((char *)onoffbutton.lastread);
105 |       uint16_t state = atoi((char *)onoffbutton.lastread);
106 |       digitalWrite(relay, state);
107 |     }
108 |   }
109 | 
110 | 
111 |   // ping the server to keep the mqtt connection alive
112 |   // NOT required if you are publishing once every KEEPALIVE seconds
113 |   /*
114 |   if(! mqtt.ping()) {
115 |     mqtt.disconnect();
116 |   }
117 |   */
118 | }
119 | 
120 | // No need to change anything inside this function
121 | // Function to connect and reconnect as necessary to the MQTT server.
122 | // Should be called in the loop function and it will take care if connecting.
123 | void MQTT_connect() {
124 |   int8_t ret;
125 | 
126 |   // Stop if already connected.
127 |   if (mqtt.connected()) {
128 |     return;
129 |   }
130 | 
131 |   Serial.print("Connecting to MQTT... ");
132 | 
133 |   uint8_t retries = 3;
134 |   while ((ret = mqtt.connect()) != 0) { // connect will return 0 for connected
135 |        Serial.println(mqtt.connectErrorString(ret));
136 |        Serial.println("Retrying MQTT connection in 5 seconds...");
137 |        mqtt.disconnect();
138 |        delay(5000);  // wait 5 seconds
139 |        retries--;
140 |        if (retries == 0) {
141 |          // basically die and wait for WDT to reset me
142 |          while (1);
143 |        }
144 |   }
145 |   Serial.println("MQTT Connected!");
146 | }
147 | 


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