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Getting lirc to work with Raspberry Pi 3 (Raspbian Stretch)
Notes to make IR shield (made by LinkSprite) work in Raspberry Pi 3 (bought from Amazon [1]).
The vendor has some documentation [2] but that is not complete and sufficient for Raspbian Stretch.
Following are the changes that I made to make it work.
$ sudo apt-get update
$ sudo apt-get install lirc
# Add the following lines to /etc/modules file
lirc_rpi gpio_in_pin=18 gpio_out_pin=17
# Add the following lines to /etc/lirc/hardware.conf file
LIRCD_ARGS="--uinput --listen"
# Update the following line in /boot/config.txt
# Update the following lines in /etc/lirc/lirc_options.conf
driver = default
device = /dev/lirc0
$ sudo /etc/init.d/lircd stop
$ sudo /etc/init.d/lircd start
# Check status to make lirc is running
$ sudo /etc/init.d/lircd status
# Reboot before testing
$ reboot
# To test if lirc driver is working
$ sudo /etc/init.d/lircd stop
$ mode2 -d /dev/lirc0
<press a key in remote and you should see multple lines like below>
pulse 560
space 1706
pulse 535
# to record a custom remote/register a remote device
$ sudo /etc/init.d/lircd stop
$ sudo irrecord -d /dev/lirc0 ~/lircd.conf
# follow the instruction prompted by the above command carefully
# at the end ~/lircd.conf file will be generated
# backup the original lircd.conf
$ sudo mv /etc/lirc/lircd.conf /etc/lirc/lircd_original.conf
$ sudo cp ~/lircd.conf /etc/lirc/lircd.conf
$ sudo /etc/init.d/lircd start
# you can test if the recorded remote works by
$ irsend SEND_ONCE <device-name> KEY_POWER
$ irsend SEND_ONCE <device-name> KEY_VOLUMEUP

This is the only place amongst the many I have looked at that is both carefully written and laid out, and works.

Well Done and thanks

Exactly what I wanted to say :)

Thank you @prasanthj!

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