YouTube Tutorial -->https://www.youtube.com/watch?v=1X6FeuUiMUY
Alexa skills to control ESP8266 without opening a router's port/firewal.
In This project you will be able to control You TV with Alexa & Google Home.
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Download this project and unzip.
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Copy following folders to "C:\Program Files (x86)\Arduino\libraries"
arduinoWebSockets
ArduinoJson
IRremoteESP8266
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Connect, Capture, Update and flash your NodeMcu sketch
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Create IFTTT templates and add Heroku app URL as an end-point
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Test and enjoy.