Antonio Oentung
Created February 24, 2018

Echo Dot Home Automation

Turn on, off, and adjust the lights in your home using Alexa.

199
Echo Dot Home Automation

Things used in this project

Hardware components

ATmega328
Microchip ATmega328
×1
ESP8266 ESP-12E
Espressif ESP8266 ESP-12E
×1
Arduino UNO
Arduino UNO
×1

Custom parts and enclosures

Gerber File

This is the gerber file of the hardware, you can see it using online gerber viewer or any gerber viewer software.

Schematics

The Schematic of the hardware

this is the schematic of the hardware.

Code

Code for EchoDot

C/C++
This is the code for esp8266, to communicate with Echo dot, and control the load (in this case the load is lamp).
#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <WiFiUdp.h>
#include "switch.h"
#include "UpnpBroadcastResponder.h"
#include "CallbackFunction.h"
#include <functional>

#define lamp1 D7
#define lamp2 D6
#define lamp3 D5
#define lamp4 D0
#define LED D2
boolean connectWifi();

//on/off callbacks 
void lightOneSwitch();
void lightTwoSwitch();
void lightThreeSwitch();
void lightFourSwitch();
void lightOn();
void lightOff();
void lighthold();
String sendlight;

// Change this before you flash
const char* ssid      = "Lab Mikro";
const char* password  = "duemilanove";

UpnpBroadcastResponder upnpBroadcastResponder;
Switch *lightOne    = NULL;
Switch *lightTwo    = NULL;
Switch *lightThree  = NULL;
Switch *lightFour   = NULL;
Switch *light       = NULL;
Switch *hold        = NULL;

boolean wifiConnected = false;

void setup(){
  Serial.begin(115200);

  pinMode(lamp1, OUTPUT);
  pinMode(lamp2, OUTPUT);
  pinMode(lamp3, OUTPUT);
  pinMode(lamp4, OUTPUT);
  pinMode(LED, OUTPUT);

  digitalWrite(lamp1, LOW);
  digitalWrite(lamp2, LOW);
  digitalWrite(lamp3, LOW);
  digitalWrite(lamp4, LOW);
  digitalWrite(LED, LOW);
  
  wifiConnected = connectWifi();

  if(wifiConnected){
    upnpBroadcastResponder.beginUdpMulticast();
  
    lightOne    = new Switch("First Light",     80, lightOneSwitch,     lightOneSwitch);
    lightTwo    = new Switch("Second Light",    81, lightTwoSwitch,     lightTwoSwitch);
    lightThree  = new Switch("Third Light",     82, lightThreeSwitch,   lightThreeSwitch);
    lightFour   = new Switch("Fourth Light",    83, lightFourSwitch,    lightFourSwitch);
    light       = new Switch("Light",           84, lightOn,            lightOff);
    hold        = new Switch("pause",           85, lighthold ,         lighthold);
    
    upnpBroadcastResponder.addDevice(*lightOne);
    upnpBroadcastResponder.addDevice(*lightTwo);
    upnpBroadcastResponder.addDevice(*lightThree);
    upnpBroadcastResponder.addDevice(*lightFour);
    upnpBroadcastResponder.addDevice(*light);
    upnpBroadcastResponder.addDevice(*hold);   
  }
}
 
void loop(){
  if(wifiConnected){
    upnpBroadcastResponder.serverLoop();   
    lightOne->serverLoop();
    lightTwo->serverLoop();
    lightThree->serverLoop();
    lightFour->serverLoop();
    light->serverLoop();
    hold->serverLoop();
  }
//  Serial.println("tesi tesi");
//  delay(100);
}

void lightOff() {
    sendlight="zero";
    Serial.print(sendlight);
}

void lightOn() {
    sendlight="one";
    Serial.print(sendlight);
}

void lighthold() {
    sendlight="two";
    Serial.print(sendlight);
}

void lightOneSwitch() {
  digitalWrite(lamp1, !digitalRead(lamp1));
//  Serial.println("lamp1");

}

void lightTwoSwitch() {
  digitalWrite(lamp2, !digitalRead(lamp2));
//  Serial.println("lamp2");

}

void lightThreeSwitch() {
  digitalWrite(lamp3, !digitalRead(lamp3));
//    Serial.println("lamp3");

}

void lightFourSwitch() {
  digitalWrite(lamp4, !digitalRead(lamp4));
//  Serial.println("lamp4");
}

// connect to wifi  returns true if successful or false if not
boolean connectWifi(){
  boolean state = true;
  int i = 0;
  
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  Serial.println("");
  Serial.println("Connecting to WiFi");
 
  // Wait for connection
  Serial.print("Connecting ...");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
    if (i > 10){
      state = false;
      break;
    }
    i++;
  }
  
  if (state){
    Serial.println("");
    Serial.print("Connected to ");
    Serial.println(ssid);
    Serial.print("IP address: ");
    Serial.println(WiFi.localIP());
  }
  else {
    Serial.println("");
    Serial.println("Connection failed.");
  }
  
  return state;
}

Code for dimmer

C/C++
Thic code for arduino uno to control dimmer.
String command;
int lampstate;
int defaultstate;
int startstate;
int endstate;
int i;
void setup() {
    DDRD = (1 << PD5) | (0 << PD2);
    PORTD = (1 << PD5) | (1 << PD2);
    EICRA = (1 << ISC00) | (1 << ISC01);
    EIMSK = (1 << INT0);
    sei();
    startstate = 920;
    endstate = 40;
    Serial.begin(115200);
}

void loop() {
  skip:
  if(Serial.available()){
    
  command = Serial.readString();
  
  if(command == "one"){
    endstate = 40;
    for( i = startstate;i >= endstate;i--){
      lampstate=i;
      delay(10);
      startstate = lampstate;
        if(Serial.available()){
          command = Serial.readString();
          if(command == "two" || command == "zero"){
            goto skip;
        }
      }
   }
 }
   else if(command == "zero"){
    startstate = 920;  
    for( i = endstate;i <= startstate;i++){
      lampstate=i;
      delay(10);
      endstate = lampstate;
        if(Serial.available()){
          command = Serial.readString();
          if(command == "two" || command == "one"){
            goto skip;
          }
        }
      }
   }
  }
}

ISR(INT0_vect){
   _delay_us(440);
   PORTD &= ~(1 << PD5);
   delayMicroseconds(lampstate * 10);
   PORTD |= (1 << PD5);
   _delay_us(10);
   PORTD &= ~(1 << PD5); 
}

Credits

Antonio Oentung

Antonio Oentung

1 project • 0 followers

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