HubAlyzer

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A spectrum analyzer display for HUB75 RGB LED panels and I2S microphones

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// repository documentation

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!!! WORK IN PROGRESS !!!

# HubAlyzer

An ESP32 spectrum analyzer display for HUB75 RGB LED panels and I2S microphones (INMP441). Uses the [ESP32 Arduino core](https://github.com/espressif/arduino-esp32), the [Smartmatrix v4](https://github.com/pixelmatix/SmartMatrix) RGB LED panel library, [my fork](https://github.com/HorstBaerbel/esp32-i2s-slm) of [Ivan Kostoski I2S microphone library](https://github.com/ikostoski/esp32-i2s-slm) and my [development version](https://github.com/HorstBaerbel/arduinoFFT) of the [ArduinoFFT](https://github.com/kosme/arduinoFFT/tree/develop) library.

## Schematics

The circuit is using the SmartMatrix ["forum pinout"](https://github.com/pixelmatix/SmartMatrix/blob/fdb60faf8b140326c75761ac29970e48ac9cc6db/src/MatrixHardware_ESP32_V0.h#L208) without any level shifters for the LED matrix. This is working fine for me for two 32x16 matrices chained together. It includes the "E" pin for driving 64x64 matrices.

## Making the PCB

See the [KiCad](KiCad) directory for the PCB files. You can upload the PCB file straight to e.g. [Aisler.net](Aisler.net) and get some pretty PCBs made.

## Updating your network configuration

Edit [HubAlyzer/network_config.h](HubAlyzer/network_config.h) and put your WiFi network and password there. Make sure NOT to commit the file and upload to GitHub when forking the repo!

## Problems compiling the Arduino code

Recently there were some problems with SmartMatrix and the ESP32 Arduino libraries, see [this](https://github.com/pixelmatix/SmartMatrix/issues/165).

## Problems flashing the Arduino code

If the Arduino IDE fails to connect to the board / upload the code, see [this](https://github.com/espressif/arduino-esp32/issues/2516).

## License

If you want to build your own soft- or hardware based on this, you can. See the [MIT LICENSE](LICENSE).

## TODO

* Clean up code
* Clean up esp32-i2s-slm fork
* Merge ArduinoFFT master
* More draw functions
* Draw function switching
* Add rotary encoder handling
* And Bluetooth MIDI and/or WiFi interface

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