The story behind this project
Some summer nights are quite hot, and although I have air conditioning in my room, I can not leave it on all night ... or I wake up in the morning with a sore throat!
So what if I scheduled the air conditioner to work 10-15 minutes every hour for a while? But how, if the remote control of the device only allows one on/off programming?
Earlier this year, I started researching the Internet of Things (IoT) and discovered Arduino and other development boards such as nodeMCU / ESP8266 and then decided to start with a project that would allow me to schedule the air conditioner as I intended.
But I wanted the scheduling not to be hard-coded on the development board and would be easy to change, in less than 1 minute I could change the settings at my will.
So I decided to use my smartphone as the interface for the development board scheduling ... and this is what I used
Using the MIT App Inventor 2 , I created an app that defines the length of time the air conditioner would work and the duration of it.
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Step 1: Nodemcu + IR Transmitter
You can buy this infrared emitters on Ebay or AliExpress for less than 1€.
Connect the sensor as shown and upload the code to the nodemcu board
Step 2: Creating the App @ MIT App Inventor 2
Just import the .aia file to the App Inventor site
Step 3: Enjoy
This is my first instructable and I assume that anyone reading this knows how to use the Arduino IDE to program the board and is already registered in MIT App Inventor 2