Devices_Alexa_Program

Program to turn a dimmer light to a certain percentage, flip a light switch on/off using Alexa, Raspberry Pi, and the ESP8266 through the MQTT protocol.

FILES:

• home_automation.py is the python script that used Flask and Flask-Ask libraries to process Alexa intents. It will send servo angle values to the ESP8266 by publishing them to the MQTT server.
• MQTT_MultipleTopics.ino is an Arduino programm that is to be flashed on a ESp8266 chip. This will control the servos which will turn on/off lights
• AlexaInteractionModel_MyDevices.json is the model I used for my Alexa app in the Amazon Developer Console.
• I used ngrok to make my program live.

VARIABLES TO CHANGE:

Change the MQTT_SERVER, ssid, and password variables from MQTT_MultipleTopics.ino

STEPS TO SETUP:

1. Go to ngrok path and type: ./ngrok http 5000
2. Add the https .io URL (example: https://55055686.ngrok.io) as an endpoint in the Alexa Development Console
3. In a seperate terminal, run the python script
4. Upload the MQTT programm to the ESP8266

ALEXA COMMANDS:

• "Alexa, tell my devices to turn {OnOff}" -> LightOnOffIntent
• "Alexa, tell my devices to dimmer {maxMinUpDown}" -> DimmerDirectionIntent
• "Alexa, tell my devices to turn dimmer {Angle} degrees -> DimmerAngleIntent

MQTT PUBLISH AND SUBSCRIBE COMMANDS:

• mosquitto_sub -v -t "/devices/light"
• mosquitto_pub -t "/devices/light" -m '1' //or '0'
• mosquitto_sub -v -t "/devices/dimmer"
• mosquitto_pub -t "/devices/dimmer" -m '__some_angle__'

FUTURE PLANS

Plan to re-write this application using Javascript and built a web app using Node, Express, and React