Published January 4, 2018 © GPL3+

Smart Living Room (Home Theatre)

I built myself a voice controlled home theatre, with background light, screen and projector control. With an ESP8266 and an Arduino Nano.

IntermediateShowcase (no instructions)24 hours8,746

Things used in this project

Hardware components

Espressif ESP8266 ESP-01

Used for the communication between the amazon echo und the relay board

Arduino Nano R3

used for the projector and the screen control

ControlEverything.com Relay Shield for Particle Photon I²C 8-Channel SPDT 10-Amp

this is not the exact hardware i used, but it's a 8-Channel Relay

Software apps and online services

Arduino IDE

Story

Hey there!

I've got my girlfriend an Amazon Echo device for Christmas. Some days later I thought that this device on its own, is a little boring. So I promised her to make us a voice controlled smart living room... and this is my way to it.

While there are some opportunities for controlling some devices that make your home "smart"... but then I've only seen light controls for like 150€. That's waaay to expensive for me.

So I thought, let's build a smart, voice controlled device on my own, so I can personalize its features and expand its possibilities.

So I searched in the internet for some information, if there is any possibility to make a Board communicate with the amazon echo V.2. I found the ESP8266 board pretty fast with a library called "fauxmo". So I bought myself this board with a 8-Channel Relay Board for controlling nearly everything that is electronical.

I had to read myself into the example code, which took me some time (since i'm not a great programmer). With minor changes in the code I got it working.

After a working communication between the echo and my ESP8266, I hooked up the relay board to the module and tried some switching. After some "debugging" i got it to work.

So I hooked up a very cheap warm-light LED strip on the end of our shelves and.... taadaaa!

I looked around and only saw so many possibilites, so I stood up and got back on my computer to program much more devices into the code, that I could control with my voice.

And now I'm capable of driving the projector screen up and down, while this happens the projector gets a infrared signal to turn on/off. Also I can control the background light (seen on the picture) and the lamp on the side. Maybe I'll add some devices in the future.

Here's a short video of the functionality.

Code

#include <Arduino.h>
#include <ESP8266WiFi.h>
#include "fauxmoESP.h"
#include "credentials.h"

#define SERIAL_BAUDRATE                 115200
#define LIGHT                             D0
#define LAMP                              D1
#define START_ARD                         D2


fauxmoESP fauxmo;

// -----------------------------------------------------------------------------
// Wifi
// -----------------------------------------------------------------------------

void wifiSetup() {

    // Set WIFI module to STA mode
    WiFi.mode(WIFI_STA);

    // Connect
    Serial.printf("[WIFI] Connecting to %s ", WIFI_SSID);
    WiFi.begin(WIFI_SSID, WIFI_PASS);

    // Wait
    while (WiFi.status() != WL_CONNECTED) {
        Serial.print(".");
        delay(100);
    }
    Serial.println();

    // Connected!
    Serial.printf("[WIFI] STATION Mode, SSID: %s, IP address: %s\n", WiFi.SSID().c_str(), WiFi.localIP().toString().c_str());

}

void setup() {

    
    Serial.begin(SERIAL_BAUDRATE);
    Serial.println();
    Serial.println();

    // Wifi
    wifiSetup();

    // Setting up
    pinMode(LIGHT, OUTPUT);
    pinMode(LAMP, OUTPUT);
    pinMode(START_ARD, OUTPUT);
    
    digitalWrite(LIGHT, HIGH);
    digitalWrite(LAMP, HIGH);
    digitalWrite(START_ARD, HIGH);

    fauxmo.enable(true);

    // Add virtual devices
    fauxmo.addDevice("Licht");
    fauxmo.addDevice("Lampe"); 
    fauxmo.addDevice("Beamer");
    
   // "Control section"
    fauxmo.onSetState([](unsigned char device_id, const char * device_name, bool state) {
        Serial.printf("[MAIN] Gerät #%d (%s) ist: %s\n", device_id, device_name, state ? "AN" : "AUS");

        if( (strcmp(device_name, "Licht") == 0)){
          if(state){
            digitalWrite(LIGHT, LOW);
            } else{
            digitalWrite(LIGHT, HIGH);
              }
          }//end of if

        if( (strcmp(device_name, "Lampe") == 0)){
          if(state){
            digitalWrite(LAMP, LOW);
            } else{
              digitalWrite(LAMP, HIGH);
              }//end of if-else
          }//end of if 

        if( (strcmp(device_name, "Beamer") == 0)){
          if(state){
            digitalWrite(START_ARD, LOW);
            } else{
              digitalWrite(START_ARD, HIGH);
              }//end of if-else
          }//end of if
          
    });

    // Callback to retrieve the current state
    fauxmo.onGetState([](unsigned char device_id, const char * device_name) {
        return digitalRead(LIGHT) == LOW;
        return digitalRead(LIGHT) == HIGH;
        return digitalRead(LAMP) == LOW;
        return digitalRead(LAMP) == HIGH;
        return digitalRead(START_ARD) == LOW;
        return digitalRead(START_ARD) == HIGH;
    });

}

void loop() {
    fauxmo.handle();

    static unsigned long last = millis();
    if (millis() - last > 5000) {
        last = millis();
        Serial.printf("[MAIN] Free heap: %d bytes\n", ESP.getFreeHeap());
    }

}

#include <IRremote.h>

IRsend irsend;  // PIN 3

#define SCREEN_DOWN         6  //IN4
#define SCREEN_UP           7  //IN5

int aktiviert = 0;    // activation variable

void setup()
{
  Serial.begin(9600);
 // Setting up 
  pinMode(2, INPUT);
  pinMode(SCREEN_DOWN, OUTPUT);
  pinMode(SCREEN_UP, OUTPUT);

  // Turning the Relay switches off in the beginning 
   digitalWrite(SCREEN_DOWN, HIGH);
   digitalWrite(SCREEN_UP, HIGH);

}//end of setup()

void loop() {  
 if(digitalRead(2) == HIGH){
       if(aktiviert == 0){        //Screen down, projector on
         digitalWrite(SCREEN_DOWN, LOW);
         delay(1000);
         digitalWrite(SCREEN_DOWN, HIGH);
         delay(30000); //Wait 45 sec.
         irsend.sendNEC(0x61D6F807, 32);
         delay(15000);
         digitalWrite(SCREEN_UP, LOW);
         delay(1000);
         digitalWrite(SCREEN_UP, HIGH);
         aktiviert = 1;
       }//end of if
    }else {
      if(aktiviert == 1){         //Screen up, projector off               
         irsend.sendNEC(0x61D6F807, 32);
         delay(1000);
         irsend.sendNEC(0x61D6F807, 32);
         delay(1000);
         irsend.sendNEC(0x61D6F807, 32);
         digitalWrite(SCREEN_UP, LOW);
         delay(46000);
         digitalWrite(SCREEN_UP, HIGH);
         delay(1000);
         digitalWrite(SCREEN_DOWN, LOW);
         delay(1000);
         digitalWrite(SCREEN_DOWN, HIGH);
        aktiviert = 0;
        }//end of if       
      }//end of if-else
 }//end of loop()