Introduction: Add Infrared Interface to Your Raspberry Pi GPIO
I have many remote controls lying around. Some of these remote controls are no longer used because the appliance they controlled have gone kaput and were thrown. I was wondering whether the remote controller can communicate with Raspberry Pi. In addition, I do not want a USB based infrared because the special thing about Raspberry Pi is its GPIO. Therefore, it is a big pity not to use the GPIO. After completing this instructable, the next logical thing to do is to try "Install and Configure Linux Infrared Remote Control (LIRC) Software".
This instructable will show the following:
1. Install the infrared receiver diode in the Raspberry Pi GPIO pins
2. Install and configure kernel module for the infrared receiver diode
This instructable will NOT show:
- Install and configure Linux Infrared Remote Control software
- Use the infrared interface and remote control to do useful stuff.
The above is covered in my other instructables.
Raspberry Pi users running Raspbian OS
Works for Raspberry Pi B and Raspberry Pi 2
Step 1: Install Raspbian OS
Follow the steps in www.raspberrypi.org
Step 2: Buy the Parts
Step 3: Install the Infrared (IR) Receiver Diode
Power off Raspberry Pi.
Use three jumper wire of different colour.
Attach each wire to each leg of the IR Receiver diode.
Attach the other end of the jumper wire to the Raspberry Pi by following the adafruit's Infrared tutorial
Step 4: Install and Configure Kernel Modules
Install the Infrared (IR) Receiver kernel module
sudo modprobe lirc_rpi
Check that above kernel module is loaded
sudo lsmod | grep lirc_rpi
lirc_rpi 7498 0 lirc_dev 10391 1 lirc_rpi
We should find a line in dmesg that says:
lirc_rpi lirc_rpi.0: lirc_dev: driver lirc_rpi registered at minor = 0 [68648.951805] lirc_rpi: driver registered!
Check that Linux has created a device file to represent the infrared device hardware.
sudo ls -l /dev/lirc* crw-rw---T 1 root video 247, 0 Jan 27 15:28 /dev/lirc0 <br>
The IR Receiver device file is /dev/lirc0.
If the above device file does not exist, the installation of the infrared receiver diode hardware has FAILED.
In my Raspberry Pi, I have to reload theInfrared (IR) Receiver kernel module after ever reboot. To aviod manually reloading and make the IR Receiver kernel module persistent across reboots, add an entry to the module file.
On the terminal emulator:
Append the following to the file:
LATEST UPDATE ON 12 FEB 2015
The licr_rpi module STOPPED working after I updated my Raspbian's kernel. After googling. the following method solved the issue:
Add the following to /boot/config.txt:
Remove the lirc_rpi in /etc/modules