Saturday, January 28, 2012

Using IRMP with Arduino

I needed to implement an infrared remote control decoder, so certainly I took out my Arduino and hooked up an IR sensor chip to pin 2. Then the interesting thing started. Looking around, I found ladyada's tutorial on IR sensors. However, the method used there is pretty limited (you basically record a sample of each key signal and then compare the received signal to your samples) and unreliable for many protocols.
Then I found IRMP (german only link, sorry) which is a very versatile IR decoder for many protocols. However, IRMP is made to be used with plain avr-gcc, not from within Arduino's IDE.
But fixing that was really not very hard.
The results are available on gitorious, project arduino-addons/irmp-arduino, including a simple example sketch to test the decoder.

Note that I'll probably rebase the git tree whenever something happens in the IRMP SVN repository, so be aware of that in case you make local changes to the code and want to update from my tree.

Have fun! :-)

1 comment:

  1. Hi seife,

    just want to say thanks for your arduino implementation of irmp.

    looking for a universal usb remote receiver I was already fond of IRMP. But the drawback of IRMP is that you have to solder it for yourself because there are (afaik) no affordable ready-made devices right now.

    Then s.o. drops a hint about your arduino port. Easy to get it up and it works like a charm!