Sid
Published © LGPL

Automation Using Amazon Echo Alexa and NodeMCU Without IFTTT

Control relays attached to NodeMCUs using Amazon Echo Alexa without IFTTT.

EasyProtip30 minutes3,554
Automation Using Amazon Echo Alexa and NodeMCU Without IFTTT

Things used in this project

Hardware components

NodeMCU ESP8266 Breakout Board
NodeMCU ESP8266 Breakout Board
×1
RobotGeek Relay
RobotGeek Relay
×1
Jumper wires (generic)
Jumper wires (generic)
×1
Echo Dot
Amazon Alexa Echo Dot
×1

Software apps and online services

Alexa Voice Service
Amazon Alexa Alexa Voice Service
Arduino IDE
Arduino IDE

Story

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Code

AmazonEcho_Home_Automation_NodeMCU

Arduino
Upload the sketch to any NodeMCU and get started.. Make sure to download all the libraries that are required.
/**********************************************************************************
  * Code for controlling multiple devices connected to one NodeMCU using Amazon Echo
  * 
  * Written by Sid for Sid's E Classroom
  * 
  * https://www.youtube.com/c/SidsEClassroom
  *********************************************************************************/
#include <Arduino.h>
#include <ESP8266WiFi.h>
#include "fauxmoESP.h"

#define WIFI_SSID "**********"//change your Wifi name
#define WIFI_PASS "*********"//Change your Wifi Password
#define SERIAL_BAUDRATE                 115200

fauxmoESP fauxmo;
//declare switching pins
//Change pins according to your NodeMCU pinouts
#define Kitchen D1
#define Bedroom D2
#define Living D3
// -----------------------------------------------------------------------------
// Wifi Setup
// -----------------------------------------------------------------------------

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());
}
// -----------------------------------------------------------------------------
// Device Callback
// -----------------------------------------------------------------------------
void callback(uint8_t device_id, const char * device_name, bool state) {
  Serial.print("Device "); Serial.print(device_name); 
  Serial.print(" state: ");
  if (state) {
    Serial.println("ON");
  } else {
    Serial.println("OFF");
  }
  //Switching action on detection of device name
  if ( (strcmp(device_name, "Kitchen Lights") == 0) ) {
    // adjust the relay immediately!
    if (state) {
      digitalWrite(Kitchen, HIGH);
    } else {
      digitalWrite(Kitchen, LOW);
    }
  }
  if ( (strcmp(device_name, "Bedroom Lights") == 0) ) {
    // adjust the relay immediately!
    if (state) {
      digitalWrite(Bedroom, HIGH);
    } else {
      digitalWrite(Bedroom, LOW);
    }
  }
  if ( (strcmp(device_name, "Living Room Lights") == 0) ) {
    // adjust the relay immediately!
    if (state) {
      digitalWrite(Living, HIGH);
    } else {
      digitalWrite(Living, LOW);
    }
  }
}

void setup() {
    //Initialize pins to Low on device start
    pinMode(Kitchen, OUTPUT);
    digitalWrite(Kitchen, LOW);
    pinMode(Bedroom, OUTPUT);
    digitalWrite(Bedroom, LOW);
    pinMode(Living, OUTPUT);
    digitalWrite(Living, LOW);
    
    // Init serial port and clean garbage
    Serial.begin(SERIAL_BAUDRATE);
    Serial.println("FauxMo demo sketch");
    Serial.println("After connection, ask Alexa/Echo to 'turn <devicename> on' or 'off'");

    // Wifi
    wifiSetup();

    // Device Names for Simulated Wemo switches
    fauxmo.addDevice("Living Room Lights");
    fauxmo.addDevice("Kitchen Lights");
    fauxmo.addDevice("Bedroom Lights");
    fauxmo.onMessage(callback);
}

void loop() {
  fauxmo.handle();
}

Credits

Sid

Sid

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