This quick unmaintened project allows to do a simple visualizer using addressible LEDs. It can be controlled by a host computer over the serial port.
The libraries ArduinoJson and FastLED are required in order to compile the Arduino sketch. Make sure to use a 5V Microcontroller (ie: genuine Arduino Nano) if you want to control WS2812 LEDs, or use a Logic Level Converter between your µC and the LEDs to ensure proper voltage.
The provided python example requires the pyserial library.
The Arduino expects JSON dictionnaries, where the key indicates the command, and the value its parameter.
| Command | Description | Parameter |
|---|---|---|
| R[n] | Sets the Red channel of the n'th LED | 0 to 255 |
| G[n] | Sets the Green channel of the n'th LED | 0 to 255 |
| B[n] | Sets the Blue channel of the n'th LED | 0 to 255 |
| brightness | Sets the strip's general brightness | 0 to 255 |
| fadeall | Fade every LEDs to Black | 0 to 255, the lower the darker. |
| clear | Sets every LEDs to Black | any |
Example :
{"R1":100,"G2":150,"B3":200,"fadeall":220} Will set the first 3 LEDs to red, green and blue, and fade every led a bit to black.