Trying to figure out how to use the flirc to send IR commands is pretty daunting. For starters, the blog post won't load: http://blog.flirc.tv/index.php/2017/08/06/sdk-release-linux-rpi-ir-transmit-support/
I've tried to cobble together various ways to do it, but I have seen three different flirc_util commands mentioned that don't work, finally finding the one that currently works with software version 3.25.3, which is the "sendir" command.
My use case I would think is common, I want to use a remote to control a device the remote doesn't support, so I want Flirc to receive one command and transmit another. I'll program my remote to control some arbitrary device it supports, then have the Flirc send a different command that controls my actual device. In my case it's my LG TV remote that I want to use to control the volume on an amplifier, but the LG remote doesn't support it nor does it have a learning function to control arbitrary devices.
To get started on a proof of concept, I can use the GUI device log to capture the IR sequence I want to transmit. I press a button on my remote and the device log will show something like:
The long string there is the IR code I guess (I really don't know what I'm doing here). I can then transmit this code by doing something like:
flirc_util.exe sendir --ik=23000 --repeat=3 --pattern="0,9003,4390,619,470,614,470,614,470,614,1588,614,470,614,474,614,470,614,1588,614,1582,614,1588,614,1587,614,470,614,1588,614,1583,614,1587,615,469,615,474,610,1587,615,1587,615,469,615,470,614,474,615,1583,614,474,614,1583,614,474,610,474,614,1584,614,1587,615,1587,614,470,614,1583,618"
This is enough for me to write a simple script that can be triggered with a keyboard press, but I suspect it will be slow and I'll need to dust off my ancient or now non-existent C skills and see what I can do.
What would be end game for me is if I could flash the flirc with my own custom firmware and then connect the flirc to power and use it standalone without any PC. Is something like this possible? Assuming it's not possible, I have a Raspberry Pi Zero W on the way to control the flirc instead.
I'll report back when I've got my setup in production, but hopefully the above will save someone some time.