This repository contains a shell script for changing the colors of an LED strip using a Flirc USB transceiver device.
The LED strip I am using is an LnLED brand, but I am pretty sure all cheap IR controlled LED strips use the same generic remote, so this should work with all of them.
Flirc provides both a GUI program and a CLI tool for recording and replaying IR commands. I have captured the commands of the remote using the device log found in the Flirc GUI. Go to File > Device Log and check Enable IR Debugging.
Pressing a key results into multiple lines being written into the device log. The IR command is the line with numbers separated by commas starting with zero.
Replaying the key is done by using the Flirc CLI and its sendir command. It
takes a --pattern argument whose value should be set to the capture sequence.
The script cycles the colors I have decoded so far (red, green, blue and white) in the quickest possible succession. Which is not very quick.
To run the script the first time, remember to first run chmod +x party.sh. To
run the script, run ./party.sh. Ensure Flirc GUI is closed before running the
script as the device can only be used by the GUI or the CLI exclusively, not at
the same time.
To kill the script, kill the terminal window running it. Ctrl+C will be caught
by flirc_util but due to the lack of delay between the invocations, it does
not seem to kill it fast enough.
# on
0,9376,4440,640,478,636,478,641,478,636,478,640,478,636,482,636,478,636,483,636,1586,641,1586,640,1598,629,1587,640,480,634,1586,641,1586,641,1586,641,1587,640,1587,636,478,640,478,636,478,636,478,644,475,636,478,636,478,640,478,636,1587,640,1586,641,1586,643,1584,641,1586,641,1586,636
# off
0,9358,4445,632,482,636,478,637,478,636,478,636,478,636,478,636,478,636,478,636,1591,636,1587,636,1591,632,1590,655,459,636,1587,636,1591,632,1590,636,478,636,1586,636,478,636,478,636,478,636,478,636,478,632,482,632,1591,636,479,631,1591,636,1587,636,1591,632,1590,637,1586,636,1586,637
# light+
0,9369,4415,636,478,637,473,667,448,667,465,649,448,667,447,641,474,640,474,641,1582,641,1582,667,1557,667,1560,641,473,663,1560,641,1582,670,1554,666,448,667,448,667,447,641,474,641,469,668,447,667,448,667,448,667,1557,667,1557,674,1554,641,1582,667,1557,667,1557,666,1557,667,1560,667
# light-
0,9394,4415,664,452,640,473,667,447,645,473,667,447,640,478,640,474,666,448,644,1582,666,1560,667,1555,671,1555,645,474,640,1582,644,1582,666,1560,667,1555,645,474,640,473,667,447,666,448,666,452,640,474,666,447,667,447,666,1555,671,1555,667,1559,666,1555,671,1555,666,1560,666,1556,671
# flash
0,9400,4414,666,452,641,473,667,451,637,477,667,511,581,474,666,452,641,473,667,1560,666,1579,648,1560,666,1561,666,452,667,1555,671,1556,671,1556,671,1556,644,1597,630,474,667,1560,666,452,640,474,667,447,640,478,667,447,667,452,666,1556,671,447,667,1560,666,1560,667,1556,671,1555,671
# strobe
0,9380,4440,641,478,641,473,641,478,640,474,640,478,641,473,641,478,640,474,640,1586,641,1586,641,1586,641,1586,645,474,640,1586,646,1581,641,1586,640,1587,640,1586,641,1586,641,1586,645,474,640,474,645,473,641,473,645,474,640,478,641,473,641,477,641,1586,641,1586,640,1587,640,1587,644
# fade
0,9385,4445,636,478,640,478,641,478,640,478,641,478,640,478,614,504,636,478,641,1586,614,1617,640,1586,641,1591,636,478,640,1587,644,1578,640,1587,640,1587,636,1591,636,478,610,504,640,1591,614,504,637,477,641,478,614,504,619,500,644,1587,640,1587,640,478,641,1586,645,1586,640,1587,640
# smooth
0,9388,4440,641,478,640,473,641,478,640,474,640,478,641,473,641,477,641,473,641,1586,640,1586,641,1586,640,1586,640,474,640,1586,641,1586,640,1586,641,1586,640,1587,640,1582,641,477,641,1582,640,478,640,474,641,473,641,478,636,478,640,474,640,1587,640,474,640,1587,640,1586,641,1582,640The codes will vary slightly between presses, presumably due to the noise in the environment between the IR transmitter in the remote and the IR receiver in the Flirc USB device.
There seems to be tolerance for this in the LED strip receiver logic. Individual numbers of the code seem to vary by as much as a few dozen between presses and that's with the remote 5 cm away from the Flirc. I would not be surprised to see the LED strip IR receiver accept numbers in the sequence that vary by a hundred or more.
Presumably the most important aspect of the code is the relative difference between the numbers and their order of magnitude. I might play around with seeing how far I can go with changing the code and still have it decode to the same action by the LED strip.
This should help decode the IR protocol between the remote and the LED strip.