ESP8266-Google_Assistant

ESP8266 module connected with google assistant or google home by MQTT protocol on Adafruit broker.

Let's get started 🚀

First you need to have your local machine preparate to work with the ESP8266 module, in this case we will use the ESP8266 ESP-12E NodeMCU board, for that I recommend to you check this web site How to programming ESP8266 ESP-12E NodeMCU.

Prerequisites 📋

• Install the Adafruit MQTT Client library, you can find it in the Arduino IDE library manager.
• Create a free acount in the Adafruit IO broker.
• Create a free ("Maker") account in this web site IFTTT, it is advisable to do it with the google account.

Installation 🔧

• Change this parameters in the code...

#define WIFI_SSID "<YOUR SSID>"
#define WIFI_PASS "<YOUR WiFi PASSWORD>"

#define MQTT_SERV "io.adafruit.com"
#define MQTT_PORT 1883
#define MQTT_NAME "<YOUR ADAFRUIT.IO USER NAME>"
#define MQTT_PASS "<YOUR AIO KEY>"

You can find the AIO Key in your Dashboards in the Adafruit.io website.

Running the tests ⚙️

• Define the pins you want to use, in this case we will define four pins for MQTT Subscriptions and one that will light up when there is wifi connection, like this.

#define WiFi_LED D4
#define greenpin D0
#define yellowpin D1
#define redpin D2
#define fanpin D3

• So then let's create your Feeds in your Adafruit account like this.
• Create a Dashboar and add your Feeds:
• You must define your Feed Subscriptions.

Adafruit_MQTT_Subscribe geenled = Adafruit_MQTT_Subscribe(&mqtt, MQTT_NAME "/feeds/geenled");
Adafruit_MQTT_Subscribe yellowled = Adafruit_MQTT_Subscribe(&mqtt, MQTT_NAME "/feeds/yellowled");
Adafruit_MQTT_Subscribe redled = Adafruit_MQTT_Subscribe(&mqtt, MQTT_NAME "/feeds/redled");
Adafruit_MQTT_Subscribe fan = Adafruit_MQTT_Subscribe(&mqtt, MQTT_NAME "/feeds/fan");

• Instance them in the setup function in your code:

mqtt.subscribe(&geenled);
mqtt.subscribe(&yellowled);
mqtt.subscribe(&redled);
mqtt.subscribe(&fan);

• How you can see, the name of my Feeds are geenled,yellowled,redled and fan you must change these feeds for yours in the mentioned parts of code and in the logic code below:

    while((subscription = mqtt.readSubscription(3000))) {
        //If we're in here, a subscription update...
        if(subscription == &geenled) {
            //Print the new value to the serial monitor
            Serial.print("Green LED: ");
            Serial.println((char*)geenled.lastread);

            //If the new value is "ON", turn the light on.
            //Otherwise, turn it off.
            if(!strcmp((char*)geenled.lastread, "ON")) {
                digitalWrite(greenpin, HIGH);
            }else {
                digitalWrite(greenpin, LOW);
            }
        }
        if(subscription == &yellowled) {
            //Print the new value to the serial monitor
            Serial.print("Yellow LED: ");
            Serial.println((char*)yellowled.lastread);

            //If the new value is "ON", turn the light on.
            //Otherwise, turn it off.
            if(!strcmp((char*)yellowled.lastread, "ON")) {
                digitalWrite(yellowpin, HIGH);
            }else {
                digitalWrite(yellowpin, LOW);
            }
        }
        if(subscription == &redled) {
            //Print the new value to the serial monitor
            Serial.print("Red LED: ");
            Serial.println((char*)redled.lastread);

            //If the new value is "ON", turn the light on.
            //Otherwise, turn it off.
            if(!strcmp((char*)redled.lastread, "ON")) {
                digitalWrite(redpin, HIGH);
            }else {
                digitalWrite(redpin, LOW);
            }
        }
        if(subscription == &fan) {
            //Print the new value to the serial monitor
            Serial.print("Fan: ");
            Serial.println((char*)fan.lastread);

            //If the new value is "ON", turn the light on.
            //Otherwise, turn it off.
            if(!strcmp((char*)fan.lastread, "ON")) {
                digitalWrite(fanpin, HIGH);
            }else {
                digitalWrite(fanpin, LOW);
            }
        }
    }

At this moment, when you upload the code to your board you should be able to control your pins from the adafruit page.

Almost there...

Now we just need to download the IFTTT mobile app in your device and configure the apletts.

• The trigger is by Google Assistant
• the action is by Adafruit, configure your Adafruit account with IFTTT in the action and then you will see your feeds. Now you should be able to controle your pins with Google Assistant

All done.