Sending IR with Python/flirc

[Benjamin1971]

I have been messing around with the IR transmit capability of my flirc. I am able to send IR signals using the flirc_util app, but it takes around 800ms to send a single command. I suspect it's because flirc_util opens the device, sends the signal, and then closes the device. If I try with the repeat set higher, it doesn't significantly affect the timing.

It looks like the SDK provides static library (libflirc.a). I'm programming in python on a raspberry pi 3, which doesn't work with static libraries. Is it possible to get direct access to the flirc to open the device and send signals? Or possibly get a dynamic library?

Thanks,

Ben

[parkerlreed]

Also looking for something like this. I tried adapting the `ir` example from the sdk but it just sends the code type and hex value to the statically linked library.

In my case I want to keep the device open and send raw IR codes programmatically.

[parkerlreed]

So I managed to adapt an example from a project that used the C library to transmit codes.

fl_transmit_raw says its taking 65 ms to run but I think running on the main thread is slowing it down with the UI waiting for it.

The code I built out is here https://gist.github.com/parkerlreed/4f7d2026c5c4a29a4a0cf39e40705473

EDIT: Oh just realized I put the device init and disconnect in the button function... I'll separate these out and see how it performs.

Edited January 3, 2025 by parkerlreed

[parkerlreed]

This is working much better. Example here

https://github.com/parkerlreed/flirc_sendir_raw

[frangipan]

@Benjamin1971 another alternative to @parkerlreed's excellent solution is to use the "shell" mode of flirc_util. Here is a project which uses this approach with Python:

flirc_repeater/flirc_repeater.py at main · andrewfraley/flirc_repeater · GitHub

Look at the "wait_loop" function.