TechPosts' $10 IoT Automation

/Google Assistant Home Automation
#include <ESP8266WiFi.h>π
#include "Adafruit_MQTT.h"
#include "Adafruit_MQTT_Client.h"
#include <Adafruit_Sensor.h>
#include <DHT.h>
#include <DHT_U.h>
#include <DNSServer.h>
#include <ESP8266WebServer.h>
#include <WiFiManager.h>


// pin connected to DH22 data line


#define Relay1 D0
#define Relay2 D1
#define Relay3 D2
//#define DHTTYPE DHT22
#define DHTPIN D4
#define DHTTYPE DHT11 // DHT 11


//WLAN Details
//#define WLAN_SSID "YOURWIFINAME" // Your SSID
//#define WLAN_PASS "PASSWORD" // Your password

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

#define AIO_SERVER "io.adafruit.com" //Adafruit Server
#define AIO_SERVERPORT 1883
#define AIO_USERNAME "Replace with Adafruit Username" // Username
#define AIO_KEY "PasteAiokeyHere" // Auth Key

// DHT sensor
DHT dht(DHTPIN, DHTTYPE);

//WIFI CLIENT
WiFiClient client;

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

Adafruit_MQTT_Publish temperature = Adafruit_MQTT_Publish(&mqtt, AIO_USERNAME "/feeds/Temperature");
Adafruit_MQTT_Publish humidity = Adafruit_MQTT_Publish(&mqtt, AIO_USERNAME "/feeds/Humidity");
Adafruit_MQTT_Subscribe Light = Adafruit_MQTT_Subscribe(&mqtt, AIO_USERNAME"/feeds/Relay1"); // Feeds name should be same everywhere
Adafruit_MQTT_Subscribe Lamp = Adafruit_MQTT_Subscribe(&mqtt, AIO_USERNAME "/feeds/Relay2");
Adafruit_MQTT_Subscribe Fan = Adafruit_MQTT_Subscribe(&mqtt, AIO_USERNAME "/feeds/Relay3");

void MQTT_connect();

void setup() {

// initialize dht22
dht.begin();

Serial.begin(115200);


pinMode(Relay1, OUTPUT);
pinMode(Relay2, OUTPUT);
pinMode(Relay3, OUTPUT);


  //WiFiManager
    //Local intialization. Once its business is done, there is no need to keep it around
    WiFiManager wifiManager;
    //reset saved settings
    //wifiManager.resetSettings();

    //set custom ip for portal
    //wifiManager.setAPStaticIPConfig(IPAddress(10,0,1,1), IPAddress(10,0,1,1), IPAddress(255,255,255,0));

    //fetches ssid and pass from eeprom and tries to connect
    //if it does not connect it starts an access point with the specified name
    //here  "AutoConnectAP"
    //and goes into a blocking loop awaiting configuration
    wifiManager.autoConnect("AutoConnectAP");
    //or use this for auto generated name ESP + ChipID
    //wifiManager.autoConnect();


    //if you get here you have connected to the WiFi
Serial.println("connected...yeey :)");



// 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(&Light);
mqtt.subscribe(&Lamp);
mqtt.subscribe(&Fan);

}
void temperatureAndHumidity()
{

float humidity_data = (float)dht.readHumidity();
float temperature_data = (float)dht.readTemperature();

// By default, the temperature report is in Celsius, for Fahrenheit uncomment
// following line.
// temperature_data = temperature_data*(9.0/5.0) + 32.0;

// Publish data
if (! temperature.publish(temperature_data))
Serial.println(F("Failed to publish temperature"));
else
Serial.println(F("Temperature published!"));
Serial.print("celsius: ");
Serial.print(temperature_data);
Serial.println("∞C");


if (! humidity.publish(humidity_data))
Serial.println(F("Failed to publish humidity"));
else
Serial.println(F("Humidity published!"));
Serial.print("Humidity: ");
Serial.print(humidity_data);
Serial.println("%");

// Repeat every 10 seconds
delay(5000);

}
void loop() {

MQTT_connect();


Adafruit_MQTT_Subscribe *subscription;
while ((subscription = mqtt.readSubscription(20000))) {
if (subscription == &Light) {
Serial.print(F("Got: "));
Serial.println((char *)Light.lastread);
int Light_State = atoi((char *)Light.lastread);
digitalWrite(Relay1, Light_State);

}
if (subscription == &Lamp) {
Serial.print(F("Got: "));
Serial.println((char *)Lamp.lastread);
int Lamp_State = atoi((char *)Lamp.lastread);
digitalWrite(Relay2, Lamp_State);
}
if (subscription == &Fan) {
Serial.print(F("Got: "));
Serial.println((char *)Fan.lastread);
int Fan_State = atoi((char *)Fan.lastread);
digitalWrite(Relay3, Fan_State);
}

}

}

void MQTT_connect() {
int8_t ret;

if (mqtt.connected()) {
return;
}

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

uint8_t retries = 3;

while ((ret = mqtt.connect()) != 0) {
Serial.println(mqtt.connectErrorString(ret));
Serial.println("Retrying MQTT connection in 2 seconds...");
mqtt.disconnect();
delay(2000);
retries--;
if (retries == 0) {
while (1);
}
}
Serial.println("MQTT Connected!");

}