Amazon Alexa Smart Home Using Node MCU
Intro: Amazon Alexa Smart Home Using Node MCU
UPDATE : THE UPDATE VERSION OF THIS PROJECT CAN BE FOUND HERE
One of the most common hobby projects you will come across the internet is HomeAutomation. There you will be controlling devices in your house through your smartphone via wifi/Bluetooth. But here we won't be using any smartphone. we will be using our own voice for it. No need to take phone everytime to control any device. Just say "Alexa turn on the device" and it will automatically do it for you.
STEP 1: THINGS YOU NEED
- HARDWARE
Amazon Alexa Device (Echo/Echo Dot)
NodeMCU
5v Relay - SOFTWARE
ARDUINO IDE
AMAZON ALEXA APPLICATION
STEP 2: WHAT IS ALEXA? WHO IS SHE ??
Amazon Alexa is a virtual assistant developed by Amazon. This assistant is used in Amazon speaker(Echo, Echo dot, Plus). This virtual assistant do many things like play music, read the flash news and much more if you want to know more about it then read this article
STEP 3: WATCH THE VIDEO TUTORIAL
STEP 4: Creating Virtual Smart Home Devices
For interfacing NodeMCU and Amazon Alexa, we will be using an Amazon skill called Sincric
- First of all, you need to create an account in Sinric. Sinric is a website which allows linking your development boards like RaspberryPi, ESP8226, ESP32 or Arduino with Amazon Alexa.
- Once the account is created login into it. Then click on the Smart Home Device Add button to create a new smart home device
- Create as many devices which you want to control. In my case, I have created 4 Smart Home Devices.
- For this project, we will be using NodeMCU wifi module. So for programming the board using Arduino IDE you need to download some additional boards. I have written a separate article showing how to do it
STEP 5: Configuring the Virtual Device
Download the example Sinric code from Github by kakopappa- Download and install WebSocketsClient.h and ArduinoJson.h library
- Now open switch_example.ino example from the downloaded file
Do the following changes in the code.
#define MyApiKey ""
- Enter your unique API key from the Sinric website, In my case, it was something like this db8d0309-84ce-485b-8957-xxxxxxxxxxxx
#define MySSID ""
- Enter your wifi network name here (case sensitive), your Amazon echo device should be in this same network.
<p>#define MyWifiPassword ""</p>
- Enter your wifi network password (case sensitive).
void turnOn(String deviceId)
{<br> if(deviceId == "xxxxxxxxxx") // Device ID of device 1
{<br> Serial.print("Turn on device id: ");<br> Serial.println(deviceId);
digitalWrite(device1, HIGH);<br> }- In the If condition enter your device 1 ID from Sinric website. In my case, it was 5b13a012870d4c3a139be009
- Do the same for all the devices in both turnOn and turnOn function
- Once everything is done. Select the correct board and upload the sketch.
- The NodeMCU will automatically connect to the wifi network
- .Make sure your wifi is turned ON and your Echo device is connected to same.
STEP 6: CONFIGURING SMARTHOME IN ALEXA APP
- Open the Alexa App in your smartphone
- Go to the Skills & Games section and search for Sinric skill and enable it
- Now search for devices or just ask say "Alexa, discover devices"It will show the number of available devices (In my case four).
- You can Rename the device name to whatever you want like fan, light ...
STEP 7: ELECTRONICS
The circuit is very simple, but be careful while connecting AC load to relay.
Always turn OFF the mains before opening any switchboard.
Now Almost everything is done. All you need is connect the AC loads to relay and sit back and enjoy the automation. Feel your self as Tony Stark ; )
Feel free to ask any queries.
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11 Comments
luca.mihai.viorel 4 years ago
[code]
/*
Version 0.4 - April 26 2019
*/
#include
#include
#include
#include // https://github.com/kakopappa/sinric/wiki/How-to-add-dependency-libraries
#include // https://github.com/kakopappa/sinric/wiki/How-to-add-dependency-libraries (use the correct version)
#include
int Auto_0 = 16;
int Auto_1 = 17;
int Auto_2 = 18;
int Auto_3 = 19;
WiFiMulti WiFiMulti;
WebSocketsClient webSocket;
WiFiClient client;
#define MyApiKey " " // TODO: Change to your sinric API Key. Your API Key is displayed on sinric.com dashboard
#define MySSID " " // TODO: Change to your Wifi network SSID
#define MyWifiPassword " " // TODO: Change to your Wifi network password
#define HEARTBEAT_INTERVAL 300000 // 5 Minutes
uint64_t heartbeatTimestamp = 0;
bool isConnected = false;
// deviceId is the ID assgined to your smart-home-device in sinric.com dashboard. Copy it from dashboard and paste it here
void turnOn(String deviceId) {
if (deviceId == " ") // Device ID of 1 device
{
Serial.print("Turn on device id: ");
Serial.println(deviceId);
digitalWrite (Auto_0, HIGH);
}
else if (deviceId == " ") // Device ID of 2 device
{
Serial.print("Turn on device id: ");
Serial.println(deviceId);
digitalWrite (Auto_1, HIGH);
}
else if (deviceId == " ") // Device ID of 3 device
{
Serial.print("Turn on device id: ");
Serial.println(deviceId);
digitalWrite (Auto_2, HIGH);
}
else if (deviceId == " ") // Device ID of 4 device
{
Serial.print("Turn on device id: ");
Serial.println(deviceId);
digitalWrite (Auto_3, HIGH);
}
else {
Serial.print("Turn on for unknown device id: ");
Serial.println(deviceId);
}
}
void turnOff(String deviceId) {
if (deviceId == " ") // Device ID of 1 device
{
Serial.print("Turn off Device ID: ");
Serial.println(deviceId);
digitalWrite (Auto_0, LOW);
}
else if (deviceId == " ") // Device ID of 2 device
{
Serial.print("Turn off Device ID: ");
Serial.println(deviceId);
digitalWrite (Auto_1, LOW);
}
else if (deviceId == " ") // Device ID of 3 device
{
Serial.print("Turn off Device ID: ");
Serial.println(deviceId);
digitalWrite (Auto_2, LOW);
}
else if (deviceId == " ") // Device ID of 4 device
{
Serial.print("Turn off Device ID: ");
Serial.println(deviceId);
digitalWrite (Auto_3, LOW);
}
else {
Serial.print("Turn off for unknown device id: ");
Serial.println(deviceId);
}
}
void webSocketEvent(WStype_t type, uint8_t * payload, size_t length) {
switch(type) {
case WStype_DISCONNECTED:
isConnected = false;
Serial.printf("[WSc] Webservice disconnected from sinric.com!\n");
break;
case WStype_CONNECTED: {
isConnected = true;
Serial.printf("[WSc] Service connected to sinric.com at url: %s\n", payload);
Serial.printf("Waiting for commands from sinric.com ...\n");
}
break;
case WStype_TEXT: {
Serial.printf("[WSc] get text: %s\n", payload);
// Example payloads
// For Switch or Light device types
// {"deviceId": xxxx, "action": "setPowerState", value: "ON"} // https://developer.amazon.com/docs/device-apis/alexa-powercontroller.html
// For Light device type
// Look at the light example in github
#if ARDUINOJSON_VERSION_MAJOR == 5
DynamicJsonBuffer jsonBuffer;
JsonObject& json = jsonBuffer.parseObject((char*)payload);
#endif
#if ARDUINOJSON_VERSION_MAJOR == 6
DynamicJsonDocument json(1024);
deserializeJson(json, (char*) payload);
#endif
String deviceId = json ["deviceId"];
String action = json ["action"];
if(action == "setPowerState") { // Switch or Light
String value = json ["value"];
if(value == "ON") {
turnOn(deviceId);
} else {
turnOff(deviceId);
}
}
else if (action == "SetTargetTemperature") {
String deviceId = json ["deviceId"];
String action = json ["action"];
String value = json ["value"];
}
else if (action == "test") {
Serial.println("[WSc] received test command from sinric.com");
}
}
break;
case WStype_BIN:
Serial.printf("[WSc] get binary length: %u\n", length);
break;
}
}
void setup() {
Serial.begin(115200);
pinMode (Auto_0, OUTPUT);
pinMode (Auto_1, OUTPUT);
pinMode (Auto_2, OUTPUT);
pinMode (Auto_3, OUTPUT);
WiFiMulti.addAP(MySSID, MyWifiPassword);
Serial.println();
Serial.print("Connecting to Wifi: ");
Serial.println(MySSID);
// Waiting for Wifi connect
while(WiFiMulti.run() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
if(WiFiMulti.run() == WL_CONNECTED) {
Serial.println("");
Serial.print("WiFi connected. ");
Serial.print("IP address: ");
Serial.println(WiFi.localIP());
}
// server address, port and URL
webSocket.begin("iot.sinric.com", 80, "/");
// event handler
webSocket.onEvent(webSocketEvent);
webSocket.setAuthorization("apikey", MyApiKey);
// try again every 5000ms if connection has failed
webSocket.setReconnectInterval(5000); // If you see 'class WebSocketsClient' has no member named 'setReconnectInterval' error update arduinoWebSockets
}
void loop() {
webSocket.loop();
if(isConnected) {
uint64_t now = millis();
// Send heartbeat in order to avoid disconnections during ISP resetting IPs over night. Thanks @MacSass
if((now - heartbeatTimestamp) > HEARTBEAT_INTERVAL) {
heartbeatTimestamp = now;
webSocket.sendTXT("H");
}
}
}
// If you want a push button: https://github.com/kakopappa/sinric/blob/master/arduino_examples/switch_with_push_button.ino
[/code]
Jigneshk5 4 years ago
joseismaelcastroruiz 4 years ago
SALUDOS AMIGOS!!
DilanM6 5 years ago
Configur my nodemcu with alexa android app , why?, this is only work amazon ecodot or other ?
joseismaelcastroruiz 4 years ago
demorgansucks 4 years ago
joseismaelcastroruiz 4 years ago
AHI VIENE TODO AMIGO!!
Shankar005 5 years ago
joseismaelcastroruiz 4 years ago
joseismaelcastroruiz 4 years ago
bhat2002.pratham 4 years ago