├── .gitattributes
└── ESP32_MQTT
    └── ESP32_MQTT.ino


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


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/ESP32_MQTT/ESP32_MQTT.ino:
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  1 | /***************************************************
  2 |   Adafruit MQTT Library ESP8266 Example
  3 | 
  4 |   Must use ESP8266 Arduino from:
  5 |     https://github.com/esp8266/Arduino
  6 | 
  7 |   Works great with Adafruit's Huzzah ESP board & Feather
  8 |   ----> https://www.adafruit.com/product/2471
  9 |   ----> https://www.adafruit.com/products/2821
 10 | 
 11 |   Adafruit invests time and resources providing this open source code,
 12 |   please support Adafruit and open-source hardware by purchasing
 13 |   products from Adafruit!
 14 | 
 15 |   Written by Tony DiCola for Adafruit Industries.
 16 |   MIT license, all text above must be included in any redistribution
 17 |  ****************************************************/
 18 | #include <WiFi.h>
 19 | #include "Adafruit_MQTT.h"
 20 | #include "Adafruit_MQTT_Client.h"
 21 | 
 22 | #define LED 2 
 23 | 
 24 | /************************* WiFi Access Point *********************************/
 25 | 
 26 | #define WLAN_SSID       "SmS_jiofi"
 27 | #define WLAN_PASS       "sms123458956"
 28 | 
 29 | /************************* Adafruit.io Setup *********************************/
 30 | 
 31 | #define AIO_SERVER      "io.adafruit.com"
 32 | #define AIO_SERVERPORT  1883                   // use 8883 for SSL
 33 | #define AIO_USERNAME    "techiesms"
 34 | #define AIO_KEY         "912b30c900574034a653f41e2b4df838"
 35 | #define topic_name "light"
 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 WiFiClientSecure 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 'onoff' for subscribing to changes.
 50 | Adafruit_MQTT_Subscribe onoffbutton = Adafruit_MQTT_Subscribe(&mqtt, AIO_USERNAME "/feeds/"topic_name);
 51 | 
 52 | /*************************** Sketch Code ************************************/
 53 | 
 54 | // Bug workaround for Arduino 1.6.6, it seems to need a function declaration
 55 | // for some reason (only affects ESP8266, likely an arduino-builder bug).
 56 | void MQTT_connect();
 57 | 
 58 | void setup() {
 59 |   Serial.begin(115200);
 60 |   delay(10);
 61 |   pinMode(LED,OUTPUT );
 62 |   Serial.println(F("Adafruit MQTT demo"));
 63 | 
 64 |   // Connect to WiFi access point.
 65 |   Serial.println(); Serial.println();
 66 |   Serial.print("Connecting to ");
 67 |   Serial.println(WLAN_SSID);
 68 | 
 69 |   WiFi.begin(WLAN_SSID, WLAN_PASS);
 70 |   while (WiFi.status() != WL_CONNECTED) {
 71 |     delay(500);
 72 |     Serial.print(".");
 73 |   }
 74 |   Serial.println();
 75 | 
 76 |   Serial.println("WiFi connected");
 77 |   Serial.println("IP address: "); Serial.println(WiFi.localIP());
 78 | 
 79 |   // Setup MQTT subscription for onoff feed.
 80 |   mqtt.subscribe(&onoffbutton);
 81 | }
 82 | 
 83 | uint32_t x = 0;
 84 | 
 85 | void loop()
 86 | {
 87 |   // Ensure the connection to the MQTT server is alive (this will make the first
 88 |   // connection and automatically reconnect when disconnected).  See the MQTT_connect
 89 |   // function definition further below.
 90 |   MQTT_connect();
 91 | 
 92 |   // this is our 'wait for incoming subscription packets' busy subloop
 93 |   // try to spend your time here
 94 | 
 95 |   Adafruit_MQTT_Subscribe *subscription;
 96 |   while ((subscription = mqtt.readSubscription(5000))) {
 97 |     if (subscription == &onoffbutton) {
 98 |       Serial.print(F("Got: "));
 99 |       Serial.println((char *)onoffbutton.lastread);
100 |       int light_data = atoi((char *)onoffbutton.lastread);
101 |       if ( light_data == 1)
102 |       {
103 |         digitalWrite(LED, HIGH);
104 |         Serial.println("Light On");
105 |       }
106 | 
107 |       else
108 |       {
109 |         digitalWrite(LED, LOW);
110 |         Serial.println("Light Off");
111 |       }
112 |     }
113 |   }
114 | }
115 | 
116 | // Function to connect and reconnect as necessary to the MQTT server.
117 | // Should be called in the loop function and it will take care if connecting.
118 | void MQTT_connect() {
119 |   int8_t ret;
120 | 
121 |   // Stop if already connected.
122 |   if (mqtt.connected()) {
123 |     return;
124 |   }
125 | 
126 |   Serial.print("Connecting to MQTT... ");
127 | 
128 |   uint8_t retries = 3;
129 |   while ((ret = mqtt.connect()) != 0) { // connect will return 0 for connected
130 |     Serial.println(mqtt.connectErrorString(ret));
131 |     Serial.println("Retrying MQTT connection in 5 seconds...");
132 |     mqtt.disconnect();
133 |     delay(5000);  // wait 5 seconds
134 |     retries--;
135 |     if (retries == 0) {
136 |       // basically die and wait for WDT to reset me
137 |       while (1);
138 |     }
139 |   }
140 |   Serial.println("MQTT Connected!");
141 | }
142 | 


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