XBMC project - Post 7 - Interfacing IR Remote to Raspberry Pi

Story Board:
Post 1: http://blog.karthiksunil.com/2013/07/installing-home-media-centre-dyi-xbmc.html
Post 2: http://blog.karthiksunil.com/2013/07/xbmc-project-what-you-need.html
Post 3: http://blog.karthiksunil.com/2013/07/xbmc-project-post-3-operating-systems.html
Post 4: http://blog.karthiksunil.com/2013/07/xbmc-project-post-4-installing-openelec.html
Post 5: http://blog.karthiksunil.com/2013/07/xbmc-project-post-5-updating-to-latest.html
Post 6: http://blog.karthiksunil.com/2014/01/xbmc-project-post-6-installing-nas.html

Background:
Raspberry Pi as XBMC media device without a remote control... !!! Something is wrong. Of course we can use Android and iPhone apps to control using Wi-Fi. But after using for a while, it feels very awkward to look for phone, unlock it, search for the app, launch it, press desired button .. may be to pause the movie ?? Uff not a good idea. How about having our TV or any other existing IR remote to control our XBMC. This post explains how

What you need:
If you having completed installation of XBMC on Raspberry Pi, you just need one Hardware for IR remote to work..I bought IR module from ebay - http://www.ebay.in/itm/181394100511

It looks something as below. It works directly with Raspberry Pi, no soldering etc required




Connections:
Very straight forward connections, VCC will get 3.3V pin, that is first pin on left lane on GPIO stack. GND will goto any of ground pin. Data pin goes to any of GPIO pins, I selected pin 18. 6th on right stack. As shown below




Settings to be done on OpenElec
Step 1: Update and Upgrade your OpenElec
This is the way you can keep your system upto date. You can do it from XBMC user interface itself.
check this link http://wiki.openelec.tv/index.php?title=Updating_OpenELEC#Update_Methods

Step 2: Install LIRC

Log into OpenElec from a computer using SSH. You can use PuTTy from windows. Default user name and password - root / openelec

Execute following command to install LIRC

sudo apt-get install lirc

This will install LIRC. 

Step 2: Configure LIRC
For IR receiver to work properly you need to configure few settings..

First off OpenElec needs to be know which remote you are going to use and which buttons means what. This information is obtained from a config file called lircd.conf. This file needs to be placed in /storage/.config/lircd.conf

For this to be achieved there is a Utility called irreccord as part of LIRC which can be used.

first all kill all running LIRC services.

killall lircd

Now start the utility

irrecord /storage/.config/lircd.conf

The instructions are straight forward. However you need to name the keys in a specific format.

You can use following names as it explains:
KEY_PLAY
KEY_PAUSE
KEY_STOP
KEY_FORWARD
KEY_REWIND
KEY_HOME
KEY_LEFT
KEY_RIGHT
KEY_UP
KEY_DOWN
KEY_OK
KEY_MUTE
KEY_MENU
KEY_EXIT
KEY_BACK
KEY_NEXT
KEY_PREVIOUS

Step 3: Start the LIRC services
Following command starts the LIRC services. Make sure you have attached data wire to pin 18 as shown above

modprobe lirc_rpi gpio_in_pin=18 gpio_out_pin=1

You can also start the service automatically every time the OpenElec boots, by creating a file /storage/.config/autostart.sh with below content

#!/bin/sh
modprobe lirc_rpi gpio_in_pin=18 gpio_out_pin=1

Make the above file executable
chmod ugo+x  /storage/.config/autostart.sh


Now you are all set. Reboot the system and try using the remote


Watch below video for full explanation .. Don't worry about initial circuit design he has given, you would not need those additional resistors and capacitors..