====== INFRARED ======

===== PINOUT / WIRING =====
{{:documentation:informatique:raspberrypi:infrared:raspi_ir_01.png|}}
\\
{{:documentation:informatique:raspberrypi:infrared:raspi_ir_02.png|}}



===== SOFTWARE CONFIGURATION =====
==== Python Blinking LED Script ====
<code python>
#!/usr/bin/python
import RPi.GPIO as GPIO
import time
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)
GPIO.setup(22, GPIO.OUT)
while True:
    GPIO.output(22, True)
    time.sleep(1)
    GPIO.output(22, False)
    time.sleep(1)
</code>

==== LIRC ====

=== Install LIRC ===
<code bash>
sudo apt-get install lirc
</code>

=== Enable and configure the lirc_rpi kernel module.===
<code bash>
sudo nano /etc/modules
</code>

=== Add the lines below to the file ===
<WRAP left round important 30%>
Useless!
<code bash>
lirc_dev
lirc_rpi gpio_out_pin=22
</code>
// gpio_out_pin parameter points to the pin controlling the IR LED//

</WRAP>


=== Edit '/etc/lirc/hardware.conf', and add ===
<code bash>
LIRCD_ARGS="--uinput"
LOAD_MODULES=true
DRIVER="default"
DEVICE="/dev/lirc0"
MODULES="lirc_rpi"
LIRCD_CONF=""
LIRCMD_CONF=""
</code>

=== /boot/config.txt ===
<code bash>
dtoverlay=gpio-ir,gpio_pin=18
dtoverlay=gpio-ir-tx,gpio_pin=22
</code>

=== /etc/lirc/lirc_options.conf ===
<code bash>
driver          = default 
device          = /dev/lirc0
</code>

=== Reboot ===
<code bash>
sudo reboot
</code>

===== LIRC SEND COMMANDS =====

Put the remotes you want to use in ''/etc/lirc/lircd.conf.d/''.

==== CONF WITH RAW (PRONTO?) CODES ====
<code bash>
begin remote

   name  MY_REMOTE
   flags RAW_CODES
   eps            30
   aeps          100

   frequency    38000
# note ensure the modulation frequency above correctly matches your remote, default is set to 38kHz
# you can also try other common frequencies (36000,40000,56000) if you are unsure

       begin raw_codes

           name MY_TEST
...<<PUT THE RAW CODE HERE >>...  

    end raw_codes
end remote
</code>
===== PRONTO TO LIRC CONF FILE =====
<code bash>
$ pronto2lirc
</code>
Input format: KEY_NAME:HEX_VALUE HEX_VALUE HEX_VALUE...

===== PIGPIO =====
<code bash>
wget https://github.com/joan2937/pigpio/archive/master.zip
unzip master.zip
cd pigpio-master
make
sudo make install
</code>

<WRAP left round info 60%>
If the Python part of the install fails it may be because you need the setup tools.
<code bash>
sudo apt install python-setuptools python3-setuptools
</code>
</WRAP>

==== To start the pigpio daemon ====
<code bash>sudo pigpiod</code>

==== To stop the pigpio daemon ====
<code bash>sudo killall pigpiod</code>

==== github ====
<code bash>git clone https://github.com/joan2937/pigpio</code>

==== Raspbian (raspberrypi.org image) ====
<code bash>
sudo apt-get update
sudo apt-get install pigpio python-pigpio python3-pigpio
</code>

<WRAP left round info 60%>
This may not be the most recent version.  You can check the version with the command pigpiod -v.
</WRAP>

===== LINKS =====
  * https://blog.bschwind.com/2016/05/29/sending-infrared-commands-from-a-raspberry-pi-without-lirc/
  * https://git.code.sf.net/p/lirc-remotes/code