guido57 / funny-spectrum

Funny Spectrum (audio spectrum viewed by colors)

This is an Internet Radio receiver based on ESP32 (D1 Mini), PCM5102 I2S DAC and WS2812 to display the audio spectrum by colors.

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Overview

It is mostly forked from https://github.com/schreibfaul1/ESP32-audioI2S but I added something very distinctive:

1. a local web server with two pages:

• one to change the WIFI credentials
• and the other one to set up to 5 different internet radio stations

2. a button to go to the next radio station

3. two WS2812 12 LEDs rings to display the audio spectrum

Schematics

For instructions to build your own Funny Spectrum device, see https://hackaday.io/project/176937-funny-audio-spectrum-by-colors

Very basic web pages

Web page at /wifi url to set/change the WIFI credentials accessing the builtin hotspot

If no Internet is available, the device becomes an access point, which you can connect to by smartphone or PC and access this page at http://192.168.4.1

After getting a local IP address e.g. 192.168.1.242, going to the url http://192.168.1.242/wifi you see something like this:

Web page at the root of the web server (i.e. the ip address got by ESP32), to set/change up to five internet radios and set the volume

Issues

• There's no button or anything else to turn it on/off but you can set turn on(/off time mye the config page
• Even if: a) "FFT calculations"
  b) "http receiving" c) "MP3/AAC decoding" d) LEDs updating run concurrently on core 1, the FFT can run real time without any audio click.