Included are three examples of pixel based graphics for the ESP32 and OLED display (specifically I'm using the ESP32 from HELTEC - which has a built in OLED display).
Once the ESP32 is flashed with Micropython, you will need to upload the SSD1306.py library onto the board (note this is a deprecated version of the library that I found on Adafruit)
This is the classic cellular automata game of life by Conway.
The universe of the Game of Life is an infinite, two-dimensional orthogonal grid of square cells, each of which is in one of # two possible states: alive or dead, (or populated and unpopulated). Every cell interacts with its eight neighbors, which are the cells that are horizontally, vertically, or diagonally adjacent. At each step in time, t he following transitions occur:
- Any live cell with fewer than two live neighbours dies, as if by underpopulation.
- Any live cell with two or three live neighbours lives on to the next generation.
- Any live cell with more than three live neighbours dies, as if by overpopulation.
- Any dead cell with exactly three live neighbours becomes a live cell, as if by reproduction.
For this implementation, each graphic cell is made of up of a 3x3 pixel image - as a result the "universe" is 31 x 16 (or 496 cells)
To run life, you will need to upload the file world.txt which an ascii representation of the inital state
of the Universe.
To run the code, I use ampy ampy --port /dev/tty.SLAB_USBtoUART run life.py. The code is configured to run just 20
generations (feel free to modify it)
This is an implementation of a graphics program I saw years ago (does anybody remember the KIM-1 and MTU's Visible Memory board ?)
This generates 20 random swirl patterns. Lines are randomly used between successive points for some interesting effects
to run it, again use ampy with: ampy --port /dev/tty.SLAB_USBtoUART run sw.py
(note the port is for my Mac - if you're using Windows or Linux it will be different)
This plots 20 random polar equations based on:
r = 2 - 30 * math.cos( *leaves* * theta) where theta goes from 0 - 360 degrees and leaves is random
between 2 and 20
o run it, again use ampy with: ampy --port /dev/tty.SLAB_USBtoUART run polar.py
ok, ok - it's not quite "music" but I had some fun with this one. This play's "Ode to Joy" (Beethoven) but displays the score on the ESP's display. Requires a piezo speaker attached to pin 13
All of the code is written so you it can be run on both the ESP32 and a laptop running python3. If you run the code and specify any parameter the output will be dumped to a screen (versus no parameters which indicates the code should be run on an ESP32 device) I called this host mode - note in host mode the graphics obviously don't work