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kitesurfer1404 / WS2812FX

WS2812 FX Library for Arduino and ESP8266
MIT License
1.6k stars 347 forks source link

No issue.. code request / custom button function #278

Closed d4rr3n87 closed 3 years ago

d4rr3n87 commented 3 years ago

Hi.. I have been searching for a way to add audio reactive l.e.d mode to a custom button on the user ws2812fx control web interface for the "esp8266_webinterface" found in examples. So the user could use the web interface to select the pre defined buttons (such as.. static.. rainbow.. strobe.. running random etc etc) found when opening the ws2812fx control web interface and one of the desired custom buttons (custom 0 through to custom 7) to enable the led's to respond to audio.. ideally have the leds respond to audio playback via a pc over the wifi connection although microphone input is an option..

This would be a great addition to the kitesurfer1404/ws2812fx release..

Many thanks for any replys, suggestions, info or code uploaded/updated

moose4lord commented 3 years ago

Getting WS2812FX to respond to audio streaming over WiFi would be quite a feat. There are sketches for steaming mp3s to an ESP (see @earlephilhower's amazing ESP8266Audio library for examples), but I could only get them to work reliably at very low bit rates.

Adding audio reactivity with a microphone is much easier. There's lots of audio detector gadgets (see this article) that'll do the trick. See the WS2812FX _externaltrigger example sketch.

moose4lord commented 3 years ago

@d4rr3n87, I got an email with a followup question, but I don't see it in this thread. Strange. Did you delete your followup question?

moose4lord commented 3 years ago

Just FYI, the latest version of WS2812FX (v1.3.3) includes an example sketch that demos audio reactivity using a microphone.

defnotkevin92 commented 3 years ago

Is there any way to assign the audio reactive sketch to the "Custom 0" button in the web interface? I've combed through the issues and I see that you can create a custom effect using the source effects provided in the library and assign it to a custom button, and I also see that there is an audio sketch, but I havent seen exactly how to assign the audio reactivity sketch to a custom button in the interface.

moose4lord commented 3 years ago

It turns out running an audio responsive program with WiFi enabled (for a web interface) is not trivial. The problem lies with the ESP8266's WiFi subsystem, which periodically uses the on-chip ADC to fine tune the radio's RF power output. So if you use the ADC to constantly sample the microphone, the WiFi subsystem will become unstable and eventually crash. See esp8266/Arduino core issue #1634.

The secret is to not constantly sample the A0 pin, but rather sample it at a regular interval (say every 5ms). This allows some time for the WiFi subsystem to use the ADC and hopefully avoid contention for that resource.

I took a stab at it by merging the esp82666_webinterface and ws2812fx_audio_reactive example sketches, tweaked the audio sampling code, and added an Auxiliary button to the web interface to turn audio reactivity on and off. That should get you started.

audio_reactive_webinterface.zip