jimmy
e4c811f51d
Add Docker deployment support, richer Selenium/LED pattern tests, in-browser diagnostics, responsive UI improvements, and 16x16 panel simulation tooling to speed iteration and hardware-style prototyping. Made-with: Cursor
76 lines
1.4 KiB
Markdown
76 lines
1.4 KiB
Markdown
# Python LED Tutorial (NeoPixel Focus)
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This tutorial is for the browser editor's ESP32-style mocks:
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- `machine.Pin`
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- `neopixel.NeoPixel`
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Use `workspace/code/led_tutorial.py` while reading this guide.
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## 1) Basic setup
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```python
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from machine import Pin
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import neopixel
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np = neopixel.NeoPixel(Pin(4), 12)
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```
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- `Pin(4)` means data pin 4 (matching common ESP32 examples).
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- `12` is the number of LEDs in the strip/ring.
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- `np` is your LED strip object.
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## 2) Set one LED color
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```python
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np[0] = (255, 0, 0) # red
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np.write()
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```
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- Colors are `(red, green, blue)` from `0` to `255`.
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- Nothing updates visually until `np.write()`.
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## 3) Fill all LEDs
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```python
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np.fill((0, 0, 255)) # all blue
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np.write()
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```
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## 4) Clear LEDs (turn off)
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```python
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np.fill((0, 0, 0))
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np.write()
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```
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## 5) Animate over time
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```python
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import time
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for step in range(20):
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np.fill((step * 10, 0, 255 - step * 10))
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np.write()
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time.sleep(0.08)
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```
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`time.sleep(...)` controls animation speed.
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## 6) Moving pixel example
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```python
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for i in range(len(np)):
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np.fill((0, 0, 0))
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np[i] = (255, 120, 0)
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np.write()
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time.sleep(0.06)
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```
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## 7) Tips
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- Keep color values in `0..255`.
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- Use helper functions for repeated color logic.
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- Start with short loops, then increase frames once behavior looks good.
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- If the simulator is closed, run your script again to show updates.
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