Being a college student, you can become pretty lazy. This was the motivation behind my project for making a new remote for my TV that could be controlled from my phone, computer, or my voice.
I started this project my freshman year in college, before I even really knew what an Arduino was, and now I see it as a super simple project that anybody with an Arduino and a computer can do.
Step 1: Materials
-Regular IR remote control that works on your device
-IR LED 940nm
-some jumper wires
-Bluetooth SPP app for Android(optional)
Step 2: Setup/IR Code Retrieval
First off I would like to point you in the direction of where I got all of this information from, here. Thanks to Adafruit and Ladyada for all of their great tutorials! I would suggest reading that tutorial to get a more in depth idea of what is involved in this project.
After reviewing the supplied code in the tutorial, I modified it slightly so that when the serial terminal printed what it read from the IR sensor, I could just copy and paste it into the corresponding function in my emulator code. I have all of my source code attached in this Instructable.
The first step in finding out what signals your remote is outputting, we need to connect your Arduino to an IR sensor as shown in the picture.
After this is done, we can upload some code to Arduino and have it output the on/off cycle for each button on your remote. Upload the 'IR_Read' from my source. When this is running, open up a serial terminal, point your remote at the IR sensor and press one of the buttons that you will want to emulate. The output should look something like this...
...and so on.
We need to get this output for every button that you plan to emulate. I would open a word document or notepad and and copy the serial output and post it somewhere that you can access it later, and be sure to label it so you know which button it corresponds to.
Step 3: Arduino Library for Your Remote
To emulate the codes, I decided to create my own Arduino library instead of putting all of the code in the actual sketch. After getting all of the on/off codes from the previous step, this part is simple. The library consists of two main functions that turn the IR LED either on or off for whatever the correct length is. There are also multiple other functions that are simply a list of the on/off times for each remote control button. If you use my supplied code, all you have to do is replace the guts of each of my functions, such as 'power', with the codes that you copied from earlier. Make sure that you save the library files in the correct Folder so that your Arduino IDE can see it.
Step 4: Arduino Emulation Code
This is quite possibly the easiest part of the whole project. The sketch simply waits for a specified character from a serial input, then calls a certain function from the previously created library. That's all there is to it! I just set each of my remote control buttons up with a keyboard button. The only hardware needed for this circuit is an IR LED and appropriately sized resistor based on the specifications on your LED. If you are hooking up a standard 940nm IR LED you could just connect it to pin 13, as most Arduino units have a built in resistor on that pin. You should now be able to control your TV or other IR controlled device right from your Arduino setup, using any serial terminal application.
Step 5: PC Desktop Application
Now that I have the working Arduino remote running using a standard serial terminal, I wanted a friendlier way to use the remote, so I decided to create a small desktop application for my Windows computer using Visual Basic. I wanted a user interface that looked something like a regular TV remote and was easy to use. I made a small program that just had buttons for the numbers, volume buttons, channel buttons, last, mute and power. This is seen in the pictures, also included in a list box so you can choose which COM port your device is on.
After making the plain, boring program that just had buttons, I wanted to get lazier. I have done a little bit of work with Windows voice recognition so I decided to include that into this program as well. This allowed me to just yell at my computer and it would change my TV channel or anything else that I could program in.
Step 6: Expansion Into Android
I have not done too much work in Android programming, but I do know a little bit about using my resources. This led me to find a serial terminal app for Android phones that allows you to connect to a bluetooth enabled Arduino and control the device. This is simply done by attaching a cheap eBay bluetooth module to the RX and TX pins on the Arduino. The app that I use is Bluetooth SPP. Of course, if you are more advanced in Android development, you could make a custom app that looks like a remote, similar to the one that we made in Visual Basic.
I hope you enjoy! If anyone decides to develop an Android app I would love to see it!!
!!!!!!!!!!**********But wait!! There's new stuff!!**********!!!!!!!!!!
Thanks to user subduck and the Instructable I was sent to, https://www.instructables.com/id/How-control-arduino-board-using-an-android-phone-a/
I have created a simple app now for my Droid Razr and it seems to be working quite well. Just like with most of my projects, I'm sure that I will constantly be changing it and making it look different/better. I will do my best to keep an update on here. Right now this app only has power, mute, last and the number buttons. I added a small speech recognition that I am really only using for testing. It is only set up to control mute for right now. I have attached the App Inventor application that you can download then add to your existing projects.
Step 7: Updates
I have made some adjustments to the Android application. I am also including the source and apk file. I have added more speech recognition options for all buttons on the remote. There should be all of the buttons that are needed included in the remote.